Interior lighting fixtures

Abstract

Interior lighting fixture, comprising: an LED light; and a control device connected to the LED luminaire to control the LED luminaire, wherein: the control device comprises a solar cell on at least part of its outer surface to generate electrical energy by absorbing visible light emitted by the LED lamp; and the control device further comprises a rechargeable battery which is charged with the generated electrical energy.

Description

[Technical Area]

[0001] The present disclosure relates to an interior lighting fixture. [Background of the invention]

[0002] A zero-energy building (ZEB) is a building designed to be more energy efficient, allowing occupants to live without additional external energy input. Passive and / or active technologies can be used to construct zero-energy buildings. Passive technology uses high-performance insulation materials, high-density windows, etc., to minimize energy loss, while active technology uses high-efficiency appliances and renewable energy.

[0003] As an example of active technology for constructing zero-energy buildings, the use of low-power building materials can be considered. In other words, zero-energy buildings can be constructed by minimizing the power consumption of lighting fixtures, which consume a lot of electricity in buildings. The use of solar panels is being discussed as a way to reduce the power consumption of lighting fixtures.

[0004] Korean Patent No. 10-1658426 discloses a portable LED lamp that uses solar energy. However, this is problematic in that it is inefficient for indoor use, as outdoor light, i.e., sunlight, is essential for charging the solar cells. [REVELATION][Technical Problem]

[0005] The present disclosure has been made in view of the above-mentioned problem, and an object of the present disclosure is to provide an indoor lighting fixture having excellent indoor light conversion efficiency. [Technical solution]

[0006] According to one aspect of the present disclosure, an indoor lighting fixture is provided comprising an LED lamp and a driving device connected to the LED lamp for driving the LED lamp, wherein the driving device comprises a solar cell on at least a portion of its exterior for generating electrical energy by absorbing visible light emitted by the LED lamp, and the driving device further comprises a rechargeable battery charged with the generated electrical energy.

[0007] The visible light absorbed by the solar cell can have a wavelength of 300 nm to 800 nm.

[0008] The visible light absorbed by the solar cell can have a wavelength of 380 nm to 800 nm.

[0009] The solar cell may comprise at least one cell selected from a Si-based photovoltaic cell, a group III-V, group II-VI, and group I-III-VI inorganic thin-film photovoltaic cell, an organic photovoltaic cell, and a dye-sensitized photovoltaic cell.

[0010] The solar cell can be an organic photovoltaic cell.

[0011] The electrical energy generated by the solar cell can be used as auxiliary power for the interior lighting.

[0012] The control device may also include an inverter configured to convert the electrical energy stored in the rechargeable battery into energy that can be used by the LED light.

[0013] The drive device may further include an input module configured to receive external power, and the power supplied by the input module may be used to charge the rechargeable battery.

[0014] The input module can be supplied with external energy when the electrical energy stored in the battery is discharged to a threshold value or less.

[0015] The control device may also include an LED inverter configured to control the LED luminaire.

[0016] The interior lighting may include a plurality of LED lights and a plurality of control devices connected to each other. [Beneficial Effects]

[0017] An indoor lighting device with a solar cell according to the present disclosure may have lower power consumption due to the high light conversion efficiency. [Short name of the characters] Fig. 1 is a view showing an indoor lighting fixture according to an embodiment of the present disclosure. Fig. Figure 2 is a graph showing the intensity of the light source as a function of wavelength and the efficiency of the solar cell. Fig. 3 is a view showing an indoor lighting fixture according to another embodiment of the present disclosure. Fig. 4 is a view showing an indoor lighting fixture according to another embodiment of the present disclosure. Fig. 5A and Fig. 5B are perspective views showing an implementation of an interior lighting fixture according to another embodiment of the present disclosure. Fig. 6 is a perspective view showing the interior of a driving device of an indoor lighting fixture according to another embodiment of the present disclosure. Fig. shows an example of an organic photovoltaic cell module. Fig. 8 is a view showing an implementation of an indoor lighting fixture according to another embodiment of the present disclosure. [Examples of implementation]

[0018] The present disclosure relates to a high-efficiency indoor lighting device using a solar cell with high light conversion efficiency.

[0019] This disclosure is described in detail below.

[0020] When this description refers to an element being “outside / inside” or “in a part” of another element, it means not only that an element is in contact with another element, but also that an element is located between the two elements.

[0021] When this description refers to a component that "comprises" or "includes" a component, this does not exclude other components but may also comprise or include the other components unless otherwise stated.

[0022] To concretely describe the present disclosure, exemplary embodiments are described in detail below. However, the embodiments of the present disclosure may be embodied in various forms, and the present disclosure should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0023] Fig. 1 is a view showing an interior lighting fixture 100 according to an embodiment of the present disclosure. Fig. 1 shows only the necessary parts of the interior lighting fixtures 100 in the present disclosure, and the interior lighting fixture 100 may be used in addition to the parts shown in Fig. 1 may contain additional parts.

[0024] Referring to Fig. 1, the interior lighting fixture 100 may include an LED lamp 110 and a control device 120, and the control device 120 may include a solar cell 122 and a rechargeable battery 124. The control device 120 is shown in Fig. 1 as containing only the solar cell 122 and the rechargeable battery 124, but this is only for convenience of explanation, and the driving device 120 may further comprise a control unit (not shown), an LED inverter 128 (see Fig. 4) etc. for operating the interior lighting fixtures 100 according to this embodiment.

[0025] The LED lamp 110 is a lighting unit that uses light-emitting diodes, and the driving device 120 can be connected to the LED lamp 110 to drive the LED lamp 110.

[0026] The driving device 120 according to this embodiment includes the solar cell 122 on at least a part of its outer surface to generate electric energy by absorbing the visible light emitted from the LED lamp 110, and includes therein the rechargeable battery 124 which is charged with the electric energy generated by the solar cell 122.

[0027] For example, the LED lamp 110 may emit light toward a first light-emitting region 112 and a second light-emitting region 114. In this case, the first light-emitting region 112 may be located outside the interior lighting fixtures 100, and the second light-emitting region 114 may be located inside the interior lighting fixtures 100, but the present disclosure is not limited thereto.

[0028] The light emitted into the first light-emitting region 112 can be used to illuminate the exterior of the interior lamp 100, and the light emitted into the second light-emitting region 114 can be used to charge the rechargeable battery 124 via the solar cell 122. The electric power charged in the rechargeable battery 124 can be appropriately converted by an inverter (not shown) and then used to drive the LED lamp 110. As such, the electric power generated by the solar cell 122 according to this embodiment can be used as auxiliary power for the interior lighting fixture 100, but the present disclosure is not limited thereto. For example, the above-mentioned electric power can also be used as main power.

[0029] The solar cell 122 according to this embodiment can absorb visible light from the spectrum of light emitted toward the second light-emitting region 114. In this case, the visible light absorbed by the solar cell 122 can have a wavelength of 300 nm to 800 nm, preferably 380 nm to 800 nm, and more preferably 400 nm to 700 nm.

[0030] Furthermore, the solar cell 122 according to this embodiment may include at least one cell selected from, but not limited to, a Si-based photovoltaic cell, a Group III-V, Group II-VI, and Group I-III-VI inorganic thin-film photovoltaic cell, an organic photovoltaic cell (OPV), and a dye-sensitized photovoltaic cell. Furthermore, the solar cell 122 may include any cell that generates electrical energy using light. Examples of Group III-V inorganic thin-film photovoltaic cells include GaAs, InP, GaInAs, GaAlAs, etc.; examples of Group II-VI inorganic thin-film photovoltaic cells include CdTe, CdS, ZnS, etc.; and examples of Group I-III-VI inorganic thin-film photovoltaic cells include CIS / Se, CGS / Se, CIGS, etc.The solar cell 122 of the indoor lighting fixture 100 according to this embodiment may be implemented as an organic photovoltaic cell to increase the light conversion efficiency in indoor lighting, but the present disclosure is not limited thereto.

[0031] In the following, the wavelength absorbed by the solar cell 122 and the light conversion efficiency are described with reference to Fig. 2 described in more detail.

[0032] Fig. Figure 2 is a diagram showing the intensity of a light source by wavelength and the efficiency of a solar cell (Hwa Sook Ryu et al. (2020), Recent progress in indoor organic photovoltaics, Nanoscale, issue 10, 5792-5804; etc.). In Fig. 2 shows a diagram for the intensity of the light source as a function of the wavelength 200 and a diagram for the efficiency of the solar cell 210.

[0033] The Fig. The light source intensity versus wavelength 200 illustrated in Figure 2 represents an intensity by wavelength for each of the outdoor lights 202, an LED lamp 204, a compact fluorescent lamp (CFL) 206, and an incandescent lamp 208. The LED light 110 according to this embodiment may use an LED bulb 204, and the LED bulb 204 has a predetermined intensity value in a wavelength band from 300 nm to 800 nm, and more preferably, a high intensity value in a wavelength band from 380 nm to 770 nm. Accordingly, the visible light absorbed by the solar cell 122 according to this embodiment may have a wavelength from 300 nm to 800 nm, and preferably from 380 nm to 800 nm, but is not limited thereto.

[0034] In addition, the Fig. 2, the efficiency 210 of the solar cell illustrated includes the first and second efficiencies 212 and 214 of the Si-based photovoltaic cell and the first and second efficiencies 216 and 218 of the organic photovoltaic cell. In this case, the first Si-based photovoltaic cell efficiency 212 and the first organic photovoltaic cell efficiency 216 refer to efficiencies when outdoor light 202 is used as the light source, and the second Si-based photovoltaic cell efficiency 214 and the second organic photovoltaic cell efficiency 218 refer to efficiencies when indoor light is used as the light source. For example, the indoor light may use the LED bulb 204, the CFL 206, and / or the incandescent bulb 208 as light sources, but the present disclosure is not limited thereto.From the illustrated power conversion efficiency 210, it can be seen that the efficiency 218 of the second organic photovoltaic cell is higher than the efficiency 214 of the second Si-based photovoltaic cell when the indoor light is used as the light source. Therefore, the solar cell 122 of the indoor lighting fixture 100 according to this embodiment can be implemented as an organic photovoltaic cell to increase the light conversion efficiency in indoor lighting, but the present disclosure is not limited thereto. In this way, when the organic photovoltaic cell is used for the solar cell 122 of the indoor lighting fixture 100, it is possible to realize a light conversion efficiency of 25% or more, thus implementing the indoor lighting fixture 100 with high efficiency. For example, when the indoor lighting fixture 100 according to this embodiment uses an LED lamp 110 (see FIG. Fig. 1) When used at 1,000 lux or less, the efficiency of the solar cell 122 can be 25% or more.

[0035] As in Fig. As shown in Figure 1, the rechargeable battery 124 is charged with the electrical energy generated by the solar cell 122. In other words, the solar cell 122 generates electricity by absorbing visible light of the light spectrum emitted by the LED lamp 110 of the interior lighting fixture 100, and the electricity generated by the solar cell 122 is stored in the rechargeable battery 124 in the form of direct current energy. At this time, the stored electricity can be converted by the inverter to power the LED lamp 110.

[0036] The interior lighting fixture 100 of this embodiment can ensure high efficiency because the electrical energy generated by the light emitted by the LED lamp 110 is stored in the rechargeable battery 124 and used to operate the LED lamp 110.

[0037] Fig. 3 is a view showing an interior lighting fixture 100 according to another embodiment of the present disclosure. Since the Fig. 3 illustrated interior lighting fixture 100 with the Fig. 1 is identical with the interior lighting fixture 100 shown, with the sole exception that an electrode layer 123 has been added, a redundant description is omitted.

[0038] Typically, a reflector may be provided to reflect the light emitted by the illumination. On the other hand, in the indoor lighting fixture 100 according to the present disclosure, the solar cell 122 may be directly attached to the exterior of the driver 120. The remaining part of the exterior of the driver 120, where the solar cell 122 is not attached, may have a silver color due to the electrode layer 123 provided thereon, and the electrode layer may be used as a reflector without providing a separate reflector. The electrode layer 123 according to this embodiment may be made of a material such as, but not limited to, silver (Ag), and may be formed into various shapes that have excellent conductivity while being capable of reflecting the light emitted by the LED lamp 110.

[0039] Furthermore, according to this embodiment, the solar cell 122 can be directly attached to the outside of the electrode layer 123 and / or the drive device 120. Accordingly, the interior lighting fixture 100 according to this embodiment can have a further increased brightness value without increasing power consumption by radiating multiple types of reflected light 1231 reflected by the electrode layer 123 to the outside of the interior light fixture 100.

[0040] Fig. 4 is a view showing an interior lighting fixture 100 according to another embodiment of the present disclosure. Since the Fig. 4 illustrated interior lighting fixture 100 with the Fig. 1 is identical to the interior lighting fixture 100 shown in FIG. 1, with the sole exception of the addition of an input module 125, a power inverter 126, and an LED inverter 128, a redundant description thereof will be omitted. Even though in Fig. 4 the electrode layer 123 from Fig. 3 is not shown, an electrode layer 123 can be provided at the same location as in Fig. 3 should be added.

[0041] As in Fig. 4, the control device 120 of the interior light 100 may include a solar cell 122, a rechargeable battery 124, an input module 125, an inverter 126 and / or an LED inverter 128.

[0042] The input module 125 receives external power. The input module 125 may, for example, include an input unit for receiving additional power from an external power source not generated by the solar cell, and a control unit for controlling the input unit.

[0043] The power supplied via the input module 125 is used to charge the rechargeable battery 124. In this case, the input module 125 according to this embodiment can be implemented to receive external power when the electrical energy stored in the rechargeable battery 124 is discharged to a threshold value or less, but the present disclosure is not limited thereto. For example, the input module 125 can be supplied with constant power for stable operation of the interior lamp 100. The threshold value can be 10% in this embodiment, but is not limited thereto. Furthermore, the threshold value for stable operation of the interior lamp 100 can be adjusted accordingly, or depending on the application example.

[0044] Accordingly, it is possible to improve the efficiency of the indoor lighting fixture 100 according to this embodiment by appropriately combining and utilizing the electric power generated by the solar cell 122 and the electric power supplied from the external power source via the input module 125. At least one of the electric power from the solar cell 122 and the electric power from the external power source can be used as the main power, and the electric power used as the main power can be appropriately adjusted depending on the usage environment of the indoor lighting fixture 100. For example, when the solar cell 122 is used as an auxiliary power source, the solar cell according to the present disclosure, when applied to the LED lamp requiring 100 mW of power, can supply 10 to 40% of the required power, that is, 10 to 40 mW of power.In addition, from the point of view of stability, it is preferable for the solar cell to deliver 10 to 20% of the required power, i.e. 10 to 20 mW of power.

[0045] The inverter 126 converts the electrical energy stored in the rechargeable battery into energy that can be used by the LED light 110, and the LED inverter 128 controls the LED light 110. In other words, the inverter 126 converts the DC energy stored in the rechargeable battery 124 into AC energy that is used to operate the LED light 110, and the LED inverter 128 uses the energy generated by the inverter 126 to operate the LED light 110. According to this embodiment, the inverter 126 can also be used to convert both the electrical energy generated by the solar cell 122 and the external power source via the input module 125.

[0046] Fig. 5A and Fig. 5B are perspective views showing an implementation of an interior lighting fixture 100 according to another embodiment of the present disclosure. Since the Fig. 5A and Fig. 5B illustrated interior lighting fixture 100 with the Fig. 1 to 4, a redundant description of the same is omitted. In addition, Fig. 5A and Fig. 5B shows an exemplary shape of the interior lighting fixture 100 according to this embodiment, and the interior lighting fixture 100 according to this embodiment can be implemented in various forms without limitation.

[0047] Fig. 5A is a perspective view of the interior lighting fixture 100 in plan view, and Fig. 5B is a bottom perspective view of the interior lighting fixture 100. Here, the direction refers to a direction in which the interior lighting fixture 100 is installed, but the present disclosure is not limited thereto.

[0048] Referring to Fig. 5A and Fig. 5B, the interior lighting fixture 100 may include an LED lamp 110 and a driver 120, and the driver 120 may include a solar cell 122 on at least a portion of its exterior.

[0049] Fig. 6 is a perspective view showing the interior of a control device 120 of an interior lighting fixture 100 according to another embodiment of the present disclosure. Since the Fig. 6, the interior lighting fixtures 100 are identical to those shown in the Fig. 1 to 5B, a redundant description of the same is omitted. In particular, Fig. 6 is a perspective view showing the interior of the control device 120 in comparison with the perspective view of Fig. 5A shows. Fig. 6 is an interior perspective view showing an example of the interior lighting fixture 100 in plan view. Although in Fig. 6, the interior lighting fixture 100 may also include a solar cell 122 and an input module 125.

[0050] Fig. 7 is a view showing an example of an organic photovoltaic cell module 700. The Fig. The organic photovoltaic cell module 700 shown in Figure 7 can be used as the solar cell 122 according to this embodiment. In other words, the back of the absorption surface of the organic photovoltaic cell module 700 can be attached to the outside of the driver 120 or the electrode layer 123, so that the absorption surface of the organic photovoltaic cell module 700 can absorb the light emitted by the LED lamp 110.

[0051] Fig. 8 is a view showing an interior lighting fixture 100 according to another embodiment of the present disclosure. Fig. The interior lighting fixture 100 shown in Fig. 8 is realized by combining a plurality of interior lighting fixtures 100 which are described with reference to the Fig. 1 to 7. Since the functionality of each of the Fig. 8, the LED lights 110 and control devices 120 are identical to the one shown in the Fig. 1 to 7, a redundant description of them is omitted. As in Fig. 8, the indoor lighting fixture 100 according to this embodiment can be implemented in a form in which a plurality of LED lamps 110 and a plurality of driving devices 120 are respectively connected to each other.

[0052] Accordingly, the indoor lighting fixture 100 according to this embodiment uses the solar cells 122 attached to the respective driving devices 120 to provide a method for driving a plurality of LED lights 110 using the light emitted by the LED lights 110. Therefore, it is possible to provide an indoor lighting fixture 100 with excellent indoor light conversion efficiency. [Industrial applicability]

[0053] An indoor lighting device with a solar cell according to the present disclosure may have lower power consumption due to the high light conversion efficiency. [List of reference symbols] 100 lighting fixtures for interiors 110 LED light 112 first light-emitting area 114 second light-emitting area 120 control device 122 solar cells 123 Electrode layer 123 reflected light 124 rechargeable battery 125 input module 126 inverters 128 LED inverters 200 Intensity of the light source by wavelength 202 outdoor light 204 LED light bulbs 206 Compact Fluorescent Lamp (CFL) 208 light bulb 210 Power conversion efficiency 212 and 214 first and second efficiency of a Si-based photovoltaic cell 216 and 218 first and second efficiency of an organic photovoltaic cell 700 Organic photovoltaic cell module QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] KR 10-1658426

[0004] Cited non-patent literature

[0000] Hwa Sook Ryu et al. (2020), Recent progress in indoor organic photovoltaics, Nanoscale, issue 10, 5792-5804

[0032]

Claims

[1] Interior lighting fixtures, comprising: an LED light; and a control device connected to the LED luminaire to control the LED luminaire, wherein: the control device comprises a solar cell on at least part of its outer surface to generate electrical energy by absorbing visible light emitted by the LED lamp; and the control device further comprises a rechargeable battery which is charged with the generated electrical energy. [2] The indoor lighting fixture according to claim 1, wherein the visible light absorbed by the solar cell has a wavelength of 300 nm to 800 nm. [3] The indoor lighting fixture according to claim 1, wherein the visible light absorbed by the solar cell has a wavelength of 380 nm to 800 nm. [4] The indoor lighting fixture according to claim 1, wherein the solar cell comprises at least one cell selected from a Si-based photovoltaic cell, a group III-V, group II-VI, and group I-III-VI inorganic thin film photovoltaic cell, an organic photovoltaic cell, and a dye-sensitized photovoltaic cell. [5] The indoor lighting fixture according to claim 1, wherein the solar cell is an organic photovoltaic cell. [6] The indoor lighting fixture according to claim 1, wherein the electrical energy generated by the solar cell is used as auxiliary power for the indoor lighting fixture. [7] The indoor lighting fixture of claim 1, wherein the driving device further includes an inverter configured to convert the electrical energy stored in the rechargeable battery into energy usable by the LED lamp. [8] Interior lighting fixture according to claim 1, wherein: the control device further comprises an input module configured to receive external power; and the energy supplied by the input module is used to charge the battery. [9] The indoor lighting fixture of claim 8, wherein the input module receives external power when the electrical energy stored in the rechargeable battery is discharged to a threshold level or below. [10] The indoor lighting fixture of claim 1, wherein the driving device further includes an LED inverter configured to drive the LED lamp. [11] The indoor lighting fixture according to claim 1, wherein the indoor lighting fixture comprises a plurality of LED lights and a plurality of driving devices connected to each other.

Images