KR101847615B1 - Sensing device - Google Patents

Abstract

A sensing device according to an embodiment of the present invention includes a solar cell for converting light energy into electric energy, a sensor module electrically connected to the solar cell, sensing a surrounding information, The case includes a window for providing external light to the solar cell, and a sensing hole for communicating at least a part of the sensor module with the outside.

Description

[0001] SENSING DEVICE [0002]

The present invention relates to a sensing device using a solar cell.

A sensing device is a device that provides a variety of external information in a digital or analog signal to a control device or the like.

Such a sensing device is connected to a control device and a wireless communication method (object Internet) according to the development of wireless communication technology. The sensing device connected to the control device via the object Internet changes various sensing information such as environmental information into a control signal and transmits the control signal to the control device in real time so that the control device outputs a quick control command based on the sensing information. There is a disadvantage in that it becomes insufficient.

Therefore, the lifetime of the battery is shortened compared with the life of the sensing device, which shortens the life of the sensing device.

Since the sensing device is exposed to the indoor and the outdoor, there is a problem that foreign substances and moisture are introduced into the interior and the internal electronic device is damaged.

It is an object of the present invention to provide a sensing device with improved lifetime and reliability.

A solar cell for converting light energy into electric energy according to an embodiment, a sensor module electrically connected to the solar cell, sensing a surrounding information, and a case for housing the solar cell and the sensor module, Includes a window for providing external light to the solar cell and a sensing hole for communicating at least a part of the sensor module with the outside.

According to the embodiment, there is an advantage that electric energy is supplied to the sensing device through the solar cell to improve the life of the sensing device.

In addition, the embodiment has an advantage that the sensor module is brought into contact with the external sensing material while preventing foreign substances from entering the inside of the sensing device.

In addition, in the embodiment, the condenser lens is disposed in the window, thereby increasing the amount of light incident on the solar cell, and there is an advantage of being easy to manufacture.

In addition, in the embodiment, the wavelength conversion unit is disposed in the window, and there is an advantage that the deterioration of the photoelectric conversion efficiency due to the mismatch of the absorption spectrum of the solar cell and the solar cell is reduced.

In addition, the embodiment has an advantage that the circuit portion has a foldable structure so that various arrangements can be made according to the case of the sensing device.

1 is a block diagram of a sensing system including a sensing device according to an embodiment of the present invention.
2 is a perspective view of a sensing device according to an embodiment of the present invention.
FIG. 3A is a cross-sectional view taken along the line AA of the sensing device shown in FIG. 2. FIG.
FIG. 3B is a cross-sectional view illustrating a sensor module and its periphery according to an embodiment of the present invention. FIG.
3C is a cross-sectional view illustrating a solar cell according to an embodiment of the present invention.
4 is a view illustrating a state where a case is removed from a sensing device according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view of a spacer and a periphery thereof according to an embodiment of the present invention. FIG.
6A is a plan view of a sensor device according to another embodiment of the present invention.
6B is a cross-sectional view taken along line BB of the sensor device shown in FIG. 6A.
7 is a cross-sectional view of a sensor device according to another embodiment of the present invention.
8 is a cross-sectional view of a sensor device according to another embodiment of the present invention.
9 is a cross-sectional view of a sensor device according to another embodiment of the present invention.
10 is a cross-sectional view of a sensor device according to another embodiment of the present invention.
11 is a cross-sectional view of a solar cell according to another embodiment of the present invention mounted on a circuit part.
12 is a cross-sectional view of a solar cell according to another embodiment of the present invention mounted on a circuit unit.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it is needless to say that the present invention is not limited to these embodiments and can be modified into various forms.

In the drawings, the same reference numerals are used for the same or similar parts throughout the specification. In the drawings, the thickness, the width, and the like are enlarged or reduced in order to make the description more clear, and the thickness, width, etc. of the present invention are not limited to those shown in the drawings.

Wherever certain parts of the specification are referred to as "comprising ", the description does not exclude other parts and may include other parts, unless specifically stated otherwise. Also, when a portion of a layer, film, region, plate, or the like is referred to as being "on" another portion, it also includes the case where another portion is located in the middle as well as the other portion. When a portion of a layer, film, region, plate, or the like is referred to as being "directly on" another portion, it means that no other portion is located in the middle.

Further, the angles and directions mentioned in the description of the structure of the embodiment are based on those shown in the drawings. In the description of the structures constituting the embodiments in the specification, reference points and positional relationships with respect to angles are not explicitly referred to, reference is made to the relevant drawings.

Hereinafter, embodiments will be described in detail with reference to the drawings.

1 is a block diagram of a sensing system including a sensing device according to an embodiment of the present invention.

The sensing system may include a sensing device 200 for sensing external information, and a control device 300 for outputting and analyzing a sensing signal provided from the sensing device 200.

The control device 300 is connected to the sensing device 200 through a wired / wireless communication method and receives a sensing signal from the sensing device 200. The control device 300 can convert the sensing information into information that can be recognized by the user and output the sensing information. Preferably, the control device 300 may be connected to the sensing device 200 by a wireless communication method.

For example, the control device 300 may include an output unit 310, a control communication module 320, and a control unit 330.

The control communication module 320 enables wireless communication between the control device 300 and the wireless communication system, between the control device 300 and the sensing device 200, or between the control device 300 and the external server. In addition, the control communication module 320 may connect the control device 300 to one or more networks.

The control communication module 320 receives the sensing information from the sensing device 200 and provides the sensing information to the control unit 330.

The control communication module 320 may be implemented in a wireless communication system such as a wireless communication system such as a wireless communication system using a communication system such as a communication system (for example, Global System for Mobile communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (Wideband CDMA), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution), LTE-A (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only) Long Term Evolution-Advanced), and the like, to a base station, an external terminal, and a server.

In addition, the control communication module 320 may be a wireless communication module such as a WLAN (Wireless LAN), a Wi-Fi (Wireless Fidelity), a Wi-Fi (Wireless Fidelity) Direct, a DLNA (Digital Living Network Alliance) Such as WiMAX (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution) and LTE-A have.

Also, the control communication module 320 may be a short-range communication method. Short range communication is a communication method using Bluetooth (Radio Frequency Identification), Infrared Data Association (IrDA), UWB (Ultra Wideband), ZigBee, Near Field Communication (NFC) Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technology.

The output unit 310 may generate at least one of a display and an audio output unit for generating an output related to a visual, auditory or tactile sense. The output unit 310 may display the sensing information provided by the control unit 330.

The control unit 330 controls the overall operation of the control device 300 and the sensing device 200. The control unit 330 may output the control signal based on the sensing information provided by the sensing device 200 to control the output unit 310. [ The control unit 330 may output the sensed level or the like calculated through the sensing information provided by the sensing device 200 to the output unit 310.

The sensing device (200) senses the surrounding information and provides sensing information to the control device (300).

For example, the sensing device 200 includes a solar cell 100, a sensor module 220, and a communication module 260.

The solar cell 100 converts light energy into electrical energy. The solar cell 100 may be used in various forms such as a silicon solar cell 100, a compound solar cell, an organic solar cell, and a dye-sensitized solar cell. The detailed structure of the solar cell 100 will be described later.

The sensor module 220 is electrically connected to the solar cell 100 and senses information of the surrounding area to output sensing information. The sensing information output from the sensor module 220 is provided to the control device 300 through the communication module 260.

The sensor module 220 may include at least one sensor for sensing at least one of the inside information of the sensing device 200, the surrounding information about the sensing device 200, and the user information about the sensing device 200.

For example, the sensor module 220 may include a proximity sensor, a lumination sensor, an acceleration sensor, a magnetic sensor, a gravity sensor (G-sensor), a gyroscope sensor a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor, an ultrasonic sensor, an optical sensor, an environmental sensor (for example, a barometer, a hygrometer, A radiation sensor, a thermal sensor, a gas sensor, etc.), a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric sensor, etc.). Of course, the sensor module 220 may have a configuration for combining information sensed by at least two of the sensors.

The communication module 260 enables communication between the sensing device 200 and the wireless communication system, between the control device 300 and the sensing device 200, or between the sensing device 200 and the external server. In addition, the communication module 260 may connect the control device 300 to one or more networks. The communication module 260 transmits the sensing information from the sensing device 200 to the control communication module 320 of the control device 300. The communication module 260 can be used in the same manner as the control communication module 320 described above.

The sensing device 200 of the embodiment may further include a battery 230, an auxiliary battery 240, and a power supply port 250. In addition, the sensing device 200 of the embodiment may further include a circuit unit 210 that electrically connects the above-described components.

The battery 230 is a device for storing electrical energy. The storage battery 230 stores the external power supplied through the power supply port 250 or the electric energy generated in the solar cell 100. For example, the battery 230 may include a capacitor or a rechargeable battery.

The power supply port 250 is for supplying external power to the battery 230 or the circuit unit 210. The power supply port 250 is preferably a universal serial bus (USB) port. In this case, the sensing device 200 may be provided with an inverter (not shown) for converting external AC electricity into DC electricity.

As another example, the power supply port 250 is a passage through which power is supplied, and also serves as a path to all the external devices connected to the sensing device 200. The power supply port 250 receives data from an external device or supplies power to each component in the sensing device 200 or allows data in the sensing device 200 to be transmitted to an external device.

The auxiliary batteries 240 and 70 supply emergency power to the circuit unit 210 and the sensor module 220 when the battery 230 is discharged. The auxiliary battery 240 is a general battery or a rechargeable battery.

Embodiments can improve the lifetime of the sensing device 200 by supplying electrical energy to the sensing device 200 through the solar cell 100.

Hereinafter, the structure of the sensing device 200 for improving the energy conversion efficiency of the solar cell 100, making it easy for the sensing module to sense external information, and preventing foreign substances from entering the solar cell will be described in detail.

FIG. 2 is a perspective view of a sensing device according to an embodiment of the present invention. FIG. 3 (a) is a cross-sectional view taken along line AA of the sensing device shown in FIG. And FIG. 3C is a cross-sectional view illustrating a solar cell according to an embodiment of the present invention.

2 and 3, the sensing device 200 of the embodiment includes a solar cell 100 that converts light energy into electrical energy, a sensor module that is electrically connected to the solar cell 100, And a case 270 accommodating at least the solar cell 100 and the sensor module 220.

First, the structure of the solar cell 100 will be described in detail with reference to FIG.

Referring to FIG. 3A, a solar cell 100 according to the present embodiment includes a semiconductor substrate 10 (using, but not limited to, a back junction solar cell for facilitating electrical connection on a substrate) A first conductive type and a second conductive type 32 and 34 having different polarities and formed on one surface (hereinafter referred to as "rear surface") of the semiconductor substrate 10, The first electrode 42 and the second electrode 44 are electrically connected to the first electrode 42 and the second electrode 42, respectively. At this time, a metal-insulator-semiconductor (MIS) structure is formed together with the electrodes 42 and 44 and the conductive regions 32 and 34 between the conductive regions 32 and 34 and the electrodes 42 and 44 And an insulating film 41 formed on the insulating film 41.

Here, a thin oxide film 20 may be positioned between the semiconductor substrate 10 and the conductive type regions 32,

The electrodes 42 and 44 include a first electrode 42 electrically connected to the first conductive type region 32 and a second electrode 44 electrically connected to the second conductive type region 34. The solar cell 100 may further include a front passivation film 24, an antireflection film 26, a rear passivation film 40, and the like, which are positioned on the front surface of the semiconductor substrate 10.

In order to construct a small-sized sensor module, the solar cell must also be made compact. In general, the solar cell uses a semiconductor substrate of a predetermined size. Therefore, the solar cell device manufactured as described above is cut to a desired size, So that they have a structure in which they are connected in series.

In this embodiment, since the solar cell in which the first electrode 42 and the second electrode 44 are both formed on the rear surface is used, the connection wiring for connecting the plurality of solar cells cut in the desired size in series is connected to the rear surface And the (+) (-) output terminal is drawn out. This will be described later in Fig.

Thin-film solar cell modules such as amorphous silicon or dye-sensitized solar cell modules can be pre-fabricated in a desired size, so wiring for a separate series connection may not be necessary.

Of course, in other embodiments, each solar cell may be supplied with a separate power source from the circuit unit 210.

Referring to FIGS. 2 and 3A, a case 270 forms the appearance of the sensing device 200. The case 270 accommodates the solar cell 100, the sensor module 220, the circuit unit 210, the communication module 260, the storage battery 230, the auxiliary battery 240, and the like.

The case 270 can have a structure and a material that can efficiently transmit external light to the solar cell 100 and restrict foreign substances and moisture from entering the interior.

The case 270 may be made of a metal or a resin material having a predetermined rigidity. For example, the case 270 may be one or two of polycarbonate (PC), an ABS resin (acrylonitrile butadiene styrene copolymer), and a polyamide resin (PA).

The case 270 may have various shapes, but a hexahedral shape is preferable in consideration of spatial arrangement. The case 270 includes a top surface 271, a bottom surface 273 facing the top surface 271, and side surfaces 272 connecting the top surface 271 and the bottom surface 273.

The case 270 has a window 279 for providing external light to the solar cell 100 and a sensing hole 276 for communicating at least a part of the sensor module 220 with the outside.

The window 279 passes the external light and provides it to the solar cell 100. For example, the window 279 may be a hole formed in the case 270. When the window 279 is a hole formed in the case 270, foreign substances are introduced into the case 270 together with external light, thereby deteriorating the reliability of the sensing device 200.

Accordingly, the window 279 of the embodiment may be a material that transmits light. Specifically, the window may be formed transparently with the same material as the case 270, or may be formed separately from the case 270 and detachably attached to the case 270. The window 279 is formed on the upper surface 271 of the case 270.

The area and the width Y1 of the window 279 are formed to be larger than the area and the width d1 of the solar cell 100 so that external light can be effectively incident on the solar cell 100 even at various incident angles of the light entering from the outside do. In particular, the center of the window 279 preferably overlaps with the center of the solar cell 100 (meaning the center of the plurality of solar cells 100 when there are a plurality of solar cells 100). Specifically, the area of the window 279 is formed larger than the area of the front surface of the solar cell 100. Also. The area and the width Y1 of the window 279 are formed to be larger than the area and the width Y2 of the space in which the solar cell 100 is disposed,

The window 279 is disposed apart from the solar cell 100. An air gap 274 is formed between the window 279 and the solar cell 100. The air gap 274 prevents the impact applied to the window 279 from being transmitted to the solar cell 100. Further, the air gap 274 provides the light collecting distance h1 when the window 279 condenses light from the outside.

The window 279 may be disposed side by side with the solar cell 100. This is because light incident through the window 279 can not be incident on the front surface of the solar cell 100 when the window 279 and the solar cell 100 are disposed in such a manner that they can not be arranged side by side. The window 279 and the solar cell 100 are arranged in parallel, which means that the window 279 and the front surface of the solar cell 100 are arranged side by side. Here, being arranged side by side means not parallel to the complete parallelism of the mathematical meaning but parallel to the range including the error.

The window 279 may have a variety of lens structures to increase the amount of light provided to the solar cell 100. This will be described later.

3B and 3C, the sensing hole 276 communicates at least a part of the sensor module 220 with the outside. The sensing hole 276 contacts the sensor module 220 with external air or the like so that the sensor module 220 can be supplied with the substance to be measured by the sensor module 220.

The sensing hole 276 is a hole formed in the case 270. The case 270 is generally installed so that the upper surface on which the window 279 is formed is directed toward the sun so that the light generated in the sun is uniformly supplied through the window 279. [ Therefore, the sensing hole 276 is disposed on one surface of the case 270 that intersects the surface of the case 270 on which the window 279 is disposed so that external rain does not flow. Specifically, the sensing holes 276 may be formed in any one of the side surfaces 272 of the case 270. [ However, the position of the sensing hole 276 is not limited thereto.

 A sensor packing 280 is formed to block foreign substances flowing through the sensing hole 276. The sensor packing 280 blocks foreign substances flowing into the case 270 through the sensing hole 276 and allows one side of the sensor module 220 to communicate with the sensing hole 276.

Specifically, the sensor packing 280 is in contact with one surface of the case 270 forming the rim of the sensing hole 276 and the sensor module 220, and is disposed so as to surround the sensing hole 276. The sensor packing 280 defines a closed curve surrounding the sensing hole 276 in the side surface 272 of the case 270 forming the rim of the sensing hole 276.

The sensor packing 280 is selected to have an adhesive force and an elastic force so as to seal between one surface of the case 270 and the sensor module 220. The sensor packing 280 may be made of rubber.

The sensor module 220 is disposed adjacent to the sensing hole 276 inside the case 270. For example, the sensor module 220 includes a plurality of sensor groups each sensing different characteristics contained in the air. Sensors suitable for each application may be configured in the form of individual chips or integrated sensor groups. Specifically, the sensor module 220 includes a sensor housing 221 having an air flow space through which air is introduced into and discharged from the sensor module 220 in one direction, a sensor housing 221 disposed in series with the sensor housing 221 in the direction of air flow, And a plurality of sensor groups each sensing different characteristics contained therein.

The sensor housing 221 has an inlet 222 for introducing air into the sensor housing 221 and a discharge port 223 for discharging the air measured by the plurality of sensors in the sensor housing 221.

The plurality of sensor groups includes a temperature and humidity sensing sensor 224 for sensing the temperature and humidity in the air, a fine dust sensor 225 for sensing the fine dust concentration in the air, a carbon dioxide sensor 226 for sensing the amount of carbon dioxide in the air, And a soot detection sensor 227 for detecting nitric oxide (NO _x ), sulfur oxides (SO _x ) and volatile organic compounds (VOC) in the air.

The inlet 222 and the outlet 223 are arranged to communicate with the sensing hole 276. Specifically, the sensor packing 280 is disposed between one surface of the sensor housing 221 and the side surface of the case 270 so as to surround the inlet 222, the outlet 223, and the sensing hole 276. The sensor packing 280 defines the air flow path that restricts the entry of foreign matter into the interior of the case 270 and allows the outside air to be supplied to the inlet port through the sensing hole 276 and out through the outlet port .

The case 270 may be formed with an interface hole 275 corresponding to the power supply port 250. The interface hole 275 provides a space through which the connector is connected to the power supply port 250.

4 is a view illustrating a state in which the case 270 is removed from the sensing device 200 according to an embodiment of the present invention.

3A and FIG. 4, the circuit unit 210 electrically connects each configuration of the sensing device 200. FIG. The circuit unit 210 supplies electric energy generated in the solar cell 100 to the storage battery 230 or the sensor module 220 and transmits the sensing information of the sensor module 220 to the communication module 260. Specifically, the circuit unit 210 is electrically connected to the solar cell 100, the sensor module 220, the storage battery 230, the auxiliary battery 240, and the power supply port 250. At the same time, the circuit unit 210 provides a space where the solar cell 100, the sensor module 220, the battery 230, the auxiliary battery 240, and the power supply port 250 are fixedly located.

The circuit unit 210 may include a printed circuit board (PCB), a metal core PCB (MCPCB), a flexible PCB (FPCB), or the like, but is not limited thereto.

The case 270 of the sensing device 200 has a hexahedral structure in order to maximize space utilization. Therefore, the circuit portion 210 can be arranged to utilize the space inside the case 270. [ As an example, the circuit portion 210 may have a multi-layer structure.

Specifically, the circuit unit 210 includes a first substrate 211 on which the solar cell 100 is disposed, a second substrate 213 spaced apart from the first substrate 211 and on which the sensor module 220 is disposed, And a connection unit 215 for electrically connecting the first substrate 211 and the second substrate 213 to each other.

The solar cell 100 and the power supply port 250 may be disposed on the first substrate 211.

The first substrate 211 is connected to the sensor module 220 or the storage battery 230 through a wiring (not shown) for connecting the solar cells 100 in series when the plurality of solar cells 100 are formed, And wiring for transmission. The solar cell 100 is bonded and fixed on the wiring.

The first substrate 211 is disposed above the second substrate 213 in the case 270 and spaced downwardly from the window 279. The first substrate 211 may be disposed in parallel with the window 279. Therefore, it is easy for the front surface of the solar cell 100 disposed on the first substrate 211 to be arranged in parallel with the window 279. [ The first substrate 211 may be disposed above the second substrate 213 to face the window 279 and the solar cell 100 and may have a two-stage structure with the second substrate 213.

The first substrate 211 is preferably made of a rigid PCB. This is because when the first substrate 211 is disposed inside the case 270 and the window 279 of the solar cell 100 is focused on the front surface of the solar cell 100 through the window 279, This is because the relative position is easily fixed.

The second substrate 213 is spaced apart from the first substrate 211. The second substrate 213 is supported on the lower surface of the case 270. At least one of the sensor module 220, the auxiliary battery, the storage battery 230, and the communication module 260 is disposed on the second substrate 213. There is an advantage that the solar cell 100 and the other structures are disposed on the first substrate 211 and the second substrate 213 which are spaced apart from each other and the heat generated in each structure can be dispersed. Therefore, there is an advantage that the reliability of the sensing device 200 is improved. If the circuit part 210 has a multilayer structure, the area of the substrate on which the solar cell 100 is disposed can be enlarged, thereby increasing the amount of electric energy supplied to the sensing module. On the second substrate 213, circuit wirings for supplying power for driving the sensor module 220 and transmitting sensed values are designed.

The connection portion 215 electrically connects the circuit wirings of the first substrate 211 and the second substrate 213. The connecting portion 215 may be a rigid PCB. The degree of freedom of arrangement of the first substrate 211 and the second substrate 213 and the degree of freedom of arrangement of the window 279 and the solar cell 100 in consideration of the size of the window 279 and the solar cell 100, In order to provide a degree of freedom of the spacing distance, the connection portion 215 is preferably composed of a circuit board of a flexible material. The connection unit 215 provides a degree of freedom in the distance between the first substrate 211 and the second substrate 213 while the first substrate 211 and the second substrate 213 are disposed to face each other. When the connecting portion 215 is made of a flexible material, the arrangement of the first substrate 211 and the second substrate 213 is facilitated even if the size of the case 270 is varied.

If the connection portion 215 has a flexible material, a means for fixing the position of the circuit portion 210 inside the case 270 is used. Hereinafter, means for fixing the position of the circuit portion 210 will be described in detail.

4 is a view illustrating a state in which a case 270 is removed from a sensing device 200 according to an embodiment of the present invention. FIG. 5 is a cross-sectional view of a spacer 291 and a periphery thereof according to an embodiment of the present invention .

Referring to FIGS. 3A, 4 and 5, the embodiment further includes a spacer 291 for holding the first substrate 211 and the second substrate 213 apart from each other. The spacer 291 maintains a distance between the first substrate 211 and the second substrate 213. One end of the spacer 291 is connected to the first substrate 211 and the other end is connected to the second substrate 213.

The spacer 291 may be detachably attached to the first substrate 211 and the second substrate 213. When the spacer 291 is detachably attached, the length of the spacer 291 can be variously selected depending on the size of the case 270. A plurality of spacers 291 may be disposed along the periphery of the first substrate 211. Specifically, the spacer 291 may be inserted into the coupling grooves 211a and 213a formed in the first substrate 211 and the second substrate 213, respectively. At this time, both ends of the spacer 291 may be formed with a coupling protrusion 291a having a width smaller than that of the spacer 291. The coupling protrusions 291a of the spacer 291 may be formed with threads to be screwed into the coupling grooves 211a and 213a.

In addition, the embodiment further includes a supporter 293 that maintains a distance between the first substrate 211 and the window 279. The distance between the window 279 and the front surface of the solar cell 100 is determined by the length of the supporter 293. The supporter 293 can be selected in various lengths considering the radius of curvature of the lens formed in the window 279, and the sizes of the solar cell 100. [ The supporter 293 may be screwed or bonded to the first substrate 211 and the case 270. The supporter 293 is coupled to the case 270 around the window 279 so as not to interfere with the light incident on the solar cell 100 in the window 279. [ Concretely, one end of the supporter 293 is connected to the upper surface of the case 270, and the other end is connected to the first substrate 211.

In another embodiment, a structure may be formed in which the first substrate 211 and the second substrate 213 can be interposed between and fixed to each other within the case 270 without a separate spacer.

Hereinafter, it is described that the window 279 has the condenser lenses 2791 and 2793 to improve the light condensing efficiency.

FIG. 6A is a plan view of a sensing device according to another embodiment of the present invention, and FIG. 6B is a cross-sectional view taken along line B-B of the sensing device shown in FIG. 6A.

Referring to Figs. 6A and 6B, there is a difference that the sensing device 200A of the embodiment further includes the condenser lenses 2791 and 2793 as compared with the embodiment of Fig. 3A.

The condenser lenses 2791 and 2793 condense the light provided from the outside onto the front surface of the solar cell 100. More specifically, the condenser lenses 2791 and 2793 condense the light incident through the window 279A. The condenser lenses 2791 and 2793 may be formed separately from the window 279A, but are preferably formed integrally with the window in consideration of manufacturing cost and manufacturing convenience. That is, the window 279A may include a condenser lens 2791 (2793). The condenser lenses 2791 and 2793 are made of various materials that transmit light.

The condenser lenses 2791 and 2793 condense the incident light into one space on the optical axis Ax. The condenser lenses 2791 and 2793 refract light incident on the condenser lenses 2791 and 2793 due to the shape of the condenser lenses 2791 and 2793 and the refractive index difference between the condenser lenses 2791 and 2793 and the outside. The refractive index of the condenser lenses 2791 and 2793 may be greater than 1, and preferably from 1.5 to 1.6. Most preferably, the condenser lenses 2791 and 2793 are made of the same material as the window 279A. The optical axis Ax of the condenser lenses 2791 and 2793 is a hypothetical line connecting the focal points of the condenser lenses 2791 and 2793 and the centers of the condenser lenses 2791 and 2793.

For example, the condenser lenses 2791 and 2793 include any one of a spherical lens, an aspheric lens, and a Fresnel lens. Preferably, the condenser lenses 2791 and 2793 may be implemented with aspheric lenses.

The condenser lenses 2791 and 2793 may have a convex or concave shape in one direction of the optical axis Ax. Concretely, the upper surface of the condenser lenses 2791 and 2793 has a curve with the optical axis Ax of the condenser lenses 2791 and 2793 as apexes. More specifically, the upper surface of the condenser lenses 2791 and 2793 has a focus on the optical axis Ax of the condenser lenses 2791 and 2793, and can form a curve having a plurality of curvature radii. More specifically, the upper surface of the condenser lenses 2791 and 2793 may have a convex shape in an upward direction and the lower surface may have a convex or flat shape in a downward direction. The converging lenses 2791 and 2793 refract light incident in parallel with the optical axis Ax of the converging lenses 2791 and 2793 to concentrate on an arbitrary position on the optical axis Ax. In FIG. 6B, the upper surface of the condenser lenses 2791 and 2793 has a convex shape protruding upward in the optical axis Ax of the condenser lenses 2791 and 2793 as apexes, and condenser lenses 2791 and 2793, Are formed flat.

The condenser lenses 2791 and 2793 form a partial area of the window 279A and have a number corresponding to the number of the solar cells 100. The condensing lenses 2791 and 2793 and the solar cell 100 are arranged such that at least some regions overlap each other so that the condensing lenses 2791 and 2793 efficiently condense the light incident from the outside onto the front surface of the solar cell 100 . Preferably, the optical axis of the condenser lenses 2791 and 2793 and the center of the solar cell 100 can be matched. Here, the center of the solar cell 100 refers to the center of the front surface of the solar cell 100 on which light is incident.

It is preferable that the area of the condenser lenses 2791 and 2793 is larger than the area of the front surface of the solar cell 100 in order to improve the light condensing efficiency of the condenser lenses 2791 and 2793. [ Here, the area of the condenser lenses 2791 and 2793 refers to the cross-sectional area obtained by cutting the condenser lenses 2791 and 2793 along the plane perpendicular to the optical axis Ax of the condenser lenses 2791 and 2793. More preferably, the cross-sectional shape of the condenser lenses 2791 and 2793 and the shape of the front surface of the solar cell 100 may be formed to be similar to each other in order to further improve the light-condensing efficiency. The cross section of the converging lenses 2791 and 2793 is perpendicular to the optical axis Ax of the converging lenses 2791 and 2793 and means a crossing surface passing through the centers of the converging lenses 2791 and 2793. It is preferable that the width d2 of the condenser lenses 2791 and 2793 is larger than the width d1 of the solar cell 100. [

The solar cell 100 may be positioned adjacent to the focal point of the condenser lens 2791 (2793). Specifically, the front surface of the solar cell 100 may be positioned adjacent to the focus of the upper surface of the condenser lenses 2791 and 2793. [ When the solar cell 100 is positioned adjacent to the focal point of the condenser lenses 2791 and 2793, it is possible to prevent light from being incident on the solar cell 100 without being condensed by the condenser lenses 2791 and 2793 .

7 is a cross-sectional view of a sensing device according to another embodiment of the present invention.

Referring to FIG. 7, the sensing device 200B according to another embodiment differs from the embodiment of FIG. 6 in the shape of the condenser lenses 2791B and 2793B.

The condenser lenses 2791B and 2793B of the embodiment have a Fresnel lens shape so that the thickness of the condenser lenses 2791B and 2793B is reduced and even if the distance between the solar cell 100 and the condenser lenses 2791B and 2793B is close Thereby providing a sufficient condensing efficiency. Therefore, if the condenser lenses 2791B and 2793B have a Fresnel lens shape, there is an advantage of reducing the size of the sensing device 200B.

More concretely, the condenser lenses 2791B and 2793B have a central region 2795 arranged on the optical axis Ax and a plurality of peripheral regions 2795 arranged annularly to surround the central region 2795 around the central region 2795 2796) 2797. The condensing lenses 2791B and 2793B have a focus on the optical axis Ax and a curved shape having a constant radius of curvature around the focal point in the central area 2795 and the peripheral areas 2796 and 2797. [ The radius of curvature of the central region 2795 is larger than the peripheral regions 2796 and 2797 and the radius of curvature of the peripheral regions 2796 and 2797 becomes smaller as the distance from the central region 2795 increases. Therefore, the condensing efficiency can be improved while reducing the thickness of the condenser lenses 2791B and 2793B. As a whole, the condenser lenses 2791B and 2793B have a plurality of ring-shaped band structures. The center area 2795 and the peripheral areas 2796 and 2797 of the condenser lens 2791B and 2793B may be collectively referred to as a Fresnel lens.

The condenser lenses 2791B and 2793B may further include a center area 2795 and a cover lens 2798 covering the peripheral areas 2796 and 2797 (Fresnel lenses). The cover lens 2798 is convex upwardly. The light incident from the outside can be primarily focused by the cover lens 2798 and secondarily collected by the Fresnel lens to improve the amount of light incident on the solar cell 100.

8 is a cross-sectional view of a sensing device according to another embodiment of the present invention.

Referring to FIG. 8, the sensing device 200C is different from the embodiment of FIG. 6 in the shape of the condenser lenses 2791C and 2793C.

The converging lenses 2791C and 2793C of the embodiment have a convex shape in the upper part and the lower part. Therefore, the degree of integration of the light incident on the condenser lenses 2791C and 2793C is increased. The shape of the lower surface of the condenser lenses 2791C and 2793C is the same as the shape of the upper surface of the condenser lenses 2791C and 2793C.

In the solar cell 100, the incident solar spectrum and the absorption spectrum of the solar cell 100 are inconsistent. While the solar light has a wide wavelength range from infrared rays to ultraviolet rays, the solar cell 100 generally absorbs only a part of visible light and performs photoelectric conversion. Therefore, the light corresponding to the ultraviolet ray of the sunlight is transmitted through the solar cell 100 without being absorbed, and the light corresponding to the infrared ray is lost as heat.

Therefore, the embodiment further includes a wavelength conversion unit for converting the wavelength of light to reduce the loss due to such spectrum mismatch.

The wavelength conversion unit converts the sunlight into the absorption region of the solar cell 100 into a wavelength. Specifically, the wavelength conversion unit converts the wavelength of the light supplied from the outside into the window 279 into the wavelength band of the visible light, which is the absorption region of the solar cell 100.

The wavelength conversion unit may include a phosphor that converts wavelengths (wavelengths of ultraviolet rays and infrared rays) other than the visible light region into wavelengths of the visible light region. For example, the phosphor may be a known phosphor such as a magenta phosphor, a cyan phosphor, a YAG system, a TAG system, a sulfide system, a silicate system, an aluminate system, a nitride system, a carbide system, a nitridosilicate system, a borate system system, a fluoride system system, Lt; / RTI >

The wavelength conversion unit may be disposed at various positions that provide solar light provided from the outside to the solar cell 100. Hereinafter, one arrangement of the wavelength conversion unit will be described in detail.

9 is a cross-sectional view of a sensing device according to another embodiment of the present invention.

Referring to FIG. 9, the sensing apparatus 200D according to another embodiment further includes a wavelength conversion unit as compared with the embodiment of FIG. 6B.

There is no limitation on the arrangement of the wavelength conversion unit, but it is preferable to be disposed in the window 279 for efficiently converting light.

The wavelength conversion unit of the embodiment may be a wavelength conversion layer 310 disposed on one side of the window 279. [ Specifically, the wavelength conversion layer 310 may be disposed on the upper surface and / or the lower surface of the window 279. The wavelength conversion layer 310 may be coated on the window 279 or bonded by a bonding agent.

10 is a cross-sectional view of a sensing device 200 according to another embodiment of the present invention.

Referring to FIG. 10, the sensing apparatus 200 according to another embodiment further includes a wavelength conversion unit as compared with the embodiment of FIG. 6B.

The wavelength conversion unit of the embodiment may be the wavelength conversion particle 320 located in the window 279. [ The wavelength conversion particles 320 can be uniformly dispersed and disposed inside the window 279. [

If the wavelength converting unit is integrally formed with the window 279 or coated on the window 279, there is an advantage that most of the incident sunlight can be converted into the absorption region wavelength of the solar cell 100. [

In order to construct a small-sized sensor module, the solar cell must also be made compact. In general, the solar cell uses a semiconductor substrate of a predetermined size. Therefore, the solar cell device manufactured as described above is cut to a desired size, And the two (+) (-) output terminals of the solar cell connected in series are connected to the wiring electrodes of the circuit part, so that a small sensor module rate can be easily manufactured.

11 is a cross-sectional view of a solar cell according to another embodiment of the present invention mounted on a circuit part.

11, the solar cells of this embodiment have a first electrode 42 and a second electrode 44 formed on the rear surface, and the second electrode 44 of the first solar cell 100a, And an inter connecter 313 for electrically connecting the first electrode 42 of the first electrode 100b. The interconnect 313 may be coupled to the solar cell or may be formed in the circuit 210 in advance.

A first output terminal 191a is formed in the first solar cell 100a and a second output terminal 191b is formed in the second solar cell 100b. The first output terminal 191a is electrically connected to the first electrodes 42 of the first solar cell 100a and the second output terminal 191b is electrically connected to the second electrodes 44 of the second solar cell 100b. Respectively.

The first output terminal 191a is connected to the first wiring electrode 311 formed on the circuit unit 210 and the second output terminal 191b is connected to the second wiring electrode 312 formed on the circuit unit 210. [ Accordingly, the plurality of solar cells are easily connected to the circuit unit 210 in a state where they are connected in series.

12 is a cross-sectional view of a solar cell according to another embodiment of the present invention mounted on a circuit unit.

Referring to FIG. 12, the solar cells of this embodiment have a first electrode 42 on the rear surface and a second electrode 44 on the front surface. An interconnect 313A is provided to connect neighboring solar cells in series.

The interconnect 313A connects the second electrodes 44 formed on the front surface of the first solar cell 100a and the first electrodes 42 formed on the rear surface of the second solar cell 100b.

A first output terminal 191a is formed in the first solar cell 100a and a second output terminal 191b is formed in the second solar cell 100b. The first output terminal 191a is electrically connected to the first electrodes 42 formed on the rear surface of the first solar cell 100a and the second output terminal 191b is electrically connected to the second electrode of the second solar cell 100b formed on the front surface of the second solar cell 100b. Two electrodes 44 are electrically connected to each other.

The first output terminal 191a is connected to the first wiring electrode 311 formed on the circuit unit 210 and the second output terminal 191b is connected to the second wiring electrode 312 formed on the circuit unit 210. [ Accordingly, the plurality of solar cells are easily connected to the circuit unit 210 in a state where they are connected in series. Since the second output terminal 191b is disposed on the front surface of the second solar cell 100b, the second output terminal 191b may be connected to the second wiring electrode 312 through the conductive wire 315. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (20)

Solar cells that convert light energy into electrical energy;
A sensor module that is electrically connected to the solar cell and senses information of the surroundings;
A case housing the solar cell and the sensor module; And
And a circuit portion in which the solar cell and the sensor module are disposed and electrically connected to the solar cell and the sensor module,
In this case,
A window for providing external light to the solar cell,
And a sensing hole communicating at least a part of the sensor module with the outside,
The circuit unit includes:
A first substrate on which the solar cell is disposed,
A second substrate spaced apart from the first substrate on which the sensor module is disposed,
And a connection portion electrically connecting the first substrate and the second substrate,
Wherein the first substrate is positioned above the second substrate relatively inside the case so that the window and the solar cell face each other to form a two-stage structure with the second substrate. The method according to claim 1,
Wherein the window is a transparent material that transmits light. 3. The method of claim 2,
Wherein the window includes a condensing lens for condensing light provided from the outside onto the front surface of the solar cell. The method of claim 3,
And the optical axis of the condensing lens and the center of the solar cell coincide with each other. The method of claim 3,
Wherein the focusing lens includes one of a spherical lens, an aspherical lens, and a Fresnel lens. The method of claim 3,
Wherein the solar cell is positioned adjacent to a focal point of the condensing lens. The method according to claim 1,
Wherein an area of the window is larger than an area of a front surface of the solar cell. The method according to claim 1,
Further comprising a wavelength conversion unit for converting the wavelength of light supplied from the outside to the window into the wavelength of the absorption region of the solar cell. 9. The method of claim 8,
Wherein the wavelength conversion unit is a wavelength conversion layer coated on an upper surface or a lower surface of the window. 9. The method of claim 8,
Wherein the wavelength conversion unit is a wavelength conversion particle dispersed and disposed inside the window. The method according to claim 1,
And a sensor packing for blocking foreign substances flowing through the sensing hole. 12. The method of claim 11,
In the sensor packing,
Wherein a sensing surface of the sensor is formed on a surface of the case, The method according to claim 1,
And a communication module for transmitting the sensing signal output from the sensor module. The method according to claim 1,
And a storage battery for storing electric energy generated in the solar cell. delete delete The method according to claim 1,
A communication module for transmitting a sensing signal output from the sensor module,
Further comprising a storage battery for storing electric energy generated in the solar cell,
Wherein the communication module and the battery are disposed on a second substrate. The method according to claim 1,
Wherein the connecting portion comprises a circuit board of a flexible material. The method according to claim 1,
Further comprising spacers for holding the first substrate and the second substrate apart from each other.











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