Power rail electronic shelf system using solar cell

Abstract

An embodiment may provide a power rail electronic shelf system using a solar cell, the system including: a solar cell power supply module including a power control unit, a main solar cell, a battery, and a super capacitor; an electronic shelf label module detachably installed on a power rail module installed on a shelf; and an auxiliary solar cell detachably installed on a housing of the power rail, wherein the power control unit charges the battery and the super capacitor with power generated from the main solar cell and the auxiliary solar cell and supplies the stored power to the electronic shelf label module.

Description

Power rail electronic shelf system using solar cells

[0001] The present invention relates to a power rail electronic shelf system using solar cells.

[0002] Most electronic tags (Electronic Shelf Labels, ESLs) for electronic shelf systems are powered by coin batteries or primary pouch batteries. With environmental concerns growing, efforts to reduce carbon footprints are becoming increasingly important. Consequently, efforts to incorporate solar cell technology into electronic tags are gaining traction, fueled by their economic feasibility and ease of maintenance. Solar cells convert sunlight into electrical energy, providing a renewable and environmentally friendly energy source, making them an attractive option for businesses seeking to reduce their carbon footprint and pursue sustainable operations. Once installed, solar cells generate electricity free of charge using sunlight, resulting in significant long-term savings compared to battery replacement or electricity costs. Furthermore, solar cells require virtually no maintenance, and electronic tag systems, in particular, avoid the hassle of regular battery replacement or charging. Furthermore, because solar cells do not require a power grid connection, they allow electronic tags to be installed anywhere within the store, allowing for greater flexibility in store layouts and ease of movement and modification. Moreover, most modern electronic tags consume very little power, making them a good match for solar cells, and even a small solar cell panel can provide sufficient energy to the electronic tag. Furthermore, electronic tags often use electronic ink (e-ink) displays, which operate on very low power. These low-power displays are compatible with solar energy, enabling efficient system operation. Despite these many advantages of solar cells, current solar electronic tags simply apply solar cells to a single tag, which has a fatal drawback: the unit manufacturing cost and product area increase in proportion to the size of the solar cell. Therefore, there is a need to develop a method that does not attach a solar cell to each tag and a technology that compensates for the disadvantage of large tag size.Furthermore, a stable supply of energy is crucial for solar cell technology. However, ESLs are installed indoors, making it difficult for the solar cells to receive direct sunlight. Furthermore, even with various artificial light sources within the store, the supply of light to the solar cells can become unstable at any time due to various environmental factors. Therefore, a technology to address this issue is needed.

[0003] The present invention provides a power rail electronic shelf system using a solar cell to which an electronic price display module is applied, but to which a battery and solar cell are not applied.

[0004] In addition, the present invention provides a power rail electronic shelf system using solar cells that can produce a required amount of electric power in response to the environment.

[0005] An embodiment includes a solar cell power supply module including a power control unit, a main solar cell, a battery, and a supercapacitor; an electronic price display module detachably installed on a power rail module installed on a shelf; and an auxiliary solar cell detachably installed on the power rail housing; wherein the power control unit can provide a power rail electronic shelf system using solar cells that charges power generated from the main solar cell and the auxiliary solar cell to the battery and the supercapacitor and supplies the charged power to the electronic price display module.

[0006] In another aspect, the power rail module may provide a power rail electronic shelf system using solar cells, including a power rail housing, a power supply line embedded in the power rail housing and connecting the power control unit and the electronic price display module to each other.

[0007] In another aspect, the power rail module can provide a power rail electronic shelf system using solar cells, which further includes an auxiliary power receiving line embedded in the power rail housing and connecting the power control unit and the auxiliary solar cell to each other.

[0008] In another aspect, a power rail electronic shelf system using a solar cell in which the supercapacitor is connected on the power supply line can be provided.

[0009] In another aspect, a power rail electronic shelf system using solar cells can be provided, in which a power rail housing is installed on each of the plurality of shelves in a shelf display rack including a plurality of shelves, and one solar cell power supply module that manages power by integrating an electronic price display module and an auxiliary solar cell installed in each of the power rail housings installed on each of the plurality of shelves is installed at one point of the shelf display rack.

[0010] In another aspect, the power rail module includes a power rail housing, a movable rail portion fastened to the power rail housing, a power supply line embedded in the power rail housing and connecting the power control portion and the electronic price display module to each other, and an auxiliary power receiving line embedded in the power rail housing and connecting the power control portion and the auxiliary solar cell to each other, and the auxiliary solar cell can provide a power rail electronic shelf system using a solar cell that is movable on the upper movable rail portion.

[0011] In another aspect, the power control unit can provide a power rail electronic shelf system using solar cells that monitors the amount of power generated by the auxiliary solar cells.

[0012] In another aspect, the power control unit can provide a power rail electronic shelf system using solar cells that controls a motor on the moving rail unit based on the amount of power generated by the auxiliary solar cell to change the position of the auxiliary solar cell.

[0013] In another aspect, the solar cell power supply module can provide a power rail electronic shelf system using solar cells, further including a communication device for communicating status information of at least one of the electronic price display module and the auxiliary solar cell with an external monitoring server.

[0014] The embodiment can provide a power rail electronic shelf system using solar cells, which can be free from size and shape restrictions of electronic price display modules and reduce manufacturing costs by enabling the use of electronic price display modules that do not have a built-in battery and do not have their own solar cells.

[0015] In addition, the embodiment can provide a power rail electronic shelf system using solar cells that can increase the total solar cell area by applying small-sized solar cells to an empty space excluding the location area of ​​the electronic price display module on the front of the power rail housing, thereby enabling additional production of driving power for the electronic price display module.

[0016] In addition, the embodiment can provide a power rail electronic shelf system using solar cells that can comprehensively supply power to multiple electronic price display modules on a shelf display stand by applying a large-capacity battery and a large-capacity solar cell.

[0017] In addition, the embodiment can provide a power rail electronic shelf system using solar cells that can adaptively meet the amount of power required for stable operation of multiple electronic price display modules on shelves by adaptively applying auxiliary solar cells to the light irradiation environment of each area within the store.

[0018] In addition, the embodiment can provide a power rail electronic shelf system using solar cells that can adaptively meet the amount of power required for stable operation of multiple electronic price display modules on a shelf by changing the application location of auxiliary solar cells based on the results of monitoring the light irradiation environment for each area within the store.

[0019] FIG. 1 is a block diagram of a power rail electronic shelf system using solar cells according to an embodiment of the present invention.

[0020] FIG. 2 and FIG. 3 schematically illustrate a power rail electronic shelf system using solar cells according to an embodiment of the present invention installed on a shelf.

[0021] FIG. 4 is a schematic diagram illustrating a power rail electronic shelf system using solar cells according to an embodiment of the present invention installed on a shelf display stand.

[0022] FIG. 5 schematically illustrates a power rail electronic shelf system using solar cells according to various embodiments of the present invention.

[0023] Figure 6 schematically illustrates an auxiliary solar cell rotating and moving on a moving rail.

[0024] The present invention is capable of various modifications and embodiments. Therefore, specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, as well as the methods for achieving them, will become clear with reference to the embodiments described in detail below together with the drawings. However, the present invention is not limited to the embodiments disclosed below and can be implemented in various forms. In the following embodiments, terms such as first, second, etc. are not used in a limiting sense but are used for the purpose of distinguishing one component from another. Furthermore, the singular expression includes plural expressions unless the context clearly indicates otherwise. Furthermore, terms such as "include" or "have" indicate the presence of a feature or component described in the specification, and do not preemptively exclude the possibility that one or more other features or components may be added. Furthermore, in the drawings, the sizes of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to what is shown.

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same drawing reference numerals, and redundant descriptions thereof will be omitted.

[0026] FIG. 1 is a block diagram of a power rail electronic shelf system using solar cells according to an embodiment of the present invention.

[0027] Referring to FIG. 1, a power rail electronic shelf system (10) using a solar cell according to an embodiment of the present invention may include a solar cell module (100), a power rail module (200), and an electronic price display module (300).

[0028] A solar cell module (100) may include a power control unit (110), a solar cell (120), a battery (130), a supercapacitor (140), and a communication unit (150).

[0029] The power control unit (110) may include a processor that executes commands and a memory that stores the commands. Furthermore, the power control unit (110) may include an energy harvesting PMIC (PMIC). The power control unit (110) may receive electricity generated by a solar cell (120).

[0030] The power control unit (110) can control the voltage and current required to manage and regulate power and efficiently transfer energy to a battery (130) or supercapacitor (140).

[0031] A solar cell (120) can convert light into electrical energy as an energy source. The solar cell (120) can be composed of at least one main solar cell (121) and at least one auxiliary solar cell (122). For example, the solar cell (120) includes a back sheet and a frame, and a solar cell circuit is formed within the frame, and the solar cell circuit can include a PN junction formed by combining a P-type semiconductor and an N-type semiconductor. The photoelectric effect occurs at the junction of the PN junction, and when light reaches the junction, electron-hole pairs are generated and these are separated by an electric field to generate current, thereby converting light into electrical energy. In addition, a plurality of electrodes are formed in the solar cell circuit of the solar cell (120) so that the generated current can be transmitted to an external circuit. The upper electrode is configured to be very thin so that light can reach the PN junction. In addition, an anti-reflection coating layer may be applied to the surface of the front portion that forms the front of the frame of the solar cell (120) to reduce light reflection and increase absorption efficiency. However, the solar cell (120) is not limited to the structure described above.

[0032] The battery (130) charges the power generated by the solar cell (120), stores energy in response to the unstable power production of the solar cell (120), and supplies stable power to the electronic price display module (300). The battery (130) may be any one of lead-acid batteries, lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, and nickel-metal hydride batteries, but is not limited thereto, and any known battery may be used as long as it has the characteristics of long life, high energy density, and low self-discharge rate.

[0033] The supercapacitor (140) can be charged and discharged very quickly. Therefore, it can be usefully applied when at least one electronic price display module (300) requires high power instantaneously. For example, it can handle the peak current instantly required when 10 or more electronic price display modules (300) operate simultaneously. In addition, when light is momentarily reduced due to external factors, the supercapacitor (140) can quickly supply energy to maintain the stability of the power supply. In addition, when the solar cell (120) generates excessive energy due to high light intensity due to external factors, the supercapacitor (140) can store the excess energy and provide additional power when needed. In addition, the battery (130) is responsible for long-term energy storage, and the supercapacitor (140) can respond to rapid power demands, thereby increasing the efficiency and reliability of the power rail electronic shelf system (10) using solar cells.

[0034] The communication unit (150) receives and transmits RF signals, also referred to as electromagnetic signals. The RF circuitry converts electrical signals to and from electromagnetic signals, and communicates with communication networks and other communication devices via the electromagnetic signals. The communication unit (150) optionally includes well-known circuitry for performing these functions, including but not limited to an antenna system, an RF transceiver, one or more amplifiers, a tuner, one or more oscillators, a digital signal processor, a CODEC chipset, a subscriber identity module (SIM) card, memory, etc. The communication unit (150) optionally communicates by wireless communication with networks, such as the Internet, also referred to as the World Wide Web (WWW), an intranet, and / or a wireless network, such as a cellular telephone network, a wireless local area network (LAN) and / or a metropolitan area network (MAN), and other devices. Wireless communications may optionally include Global System for Mobile Communications (GSM), Enhanced Data GSM Environment (EDGE), high-speed downlink packet access (HSDPA), high-speed uplink packet access (HSUPA), Evolution, Data-Only (EV-DO), HSPA, HSPA+, Dual-Cell HSPA (DC-HSPDA), long term evolution (LTE), near field communication (NFC), Wideband code division multiple access (W-CDMA), code division multiple access (CDMA), time division multiple access (TDMA), Bluetooth, Wireless Fidelity (Wi-Fi) (e.g., IEEE 802.11a, IEEE 802.Any of a plurality of communication standards, protocols and technologies including, but not limited to, IEEE 802.11b, IEEE 802.11g and / or IEEE 802.11n), VoiP (voice over Internet Protocol), Wi-MAX, protocols for email (e.g., Internet message access protocol (IMAP) and / or post office protocol (POP)), instant messaging (e.g., extensible messaging and presence protocol (XMPP), Session Initiation Protocol for Instant Messaging and Presence Leveraging Extensions (SIMPLE), Instant Messaging and Presence Service (IMPS)), Message Queueing Telemetry Transport (MQTT) protocol and / or Short Message Service (SMS), or any other suitable communication protocol including communication protocols not yet developed as of the filing date of this document. The communication unit (150) can transmit status information of the solar cell module (100) to an external monitoring server and can also receive a remote command signal from the external monitoring server.

[0035] FIG. 2 and FIG. 3 schematically illustrate a power rail electronic shelf system using solar cells according to an embodiment of the present invention installed on a shelf.

[0036] Referring to FIGS. 1 to 3, a power rail electronic shelf system (10) using solar cells can be installed in a preset area of ​​a shelf (20).

[0037] The power control unit (110), main solar cell (121), battery (130), supercapacitor (140), and communication unit (150) can be defined as a solar cell power supply module (101).

[0038] The power rail module (200) may include a power supply line (210) for supplying power to the electronic price display module (300) and an auxiliary power reception line (220) for transmitting power generated from an auxiliary solar cell (122).

[0039] The solar cell power supply module (101) and the electronic price display module (300) are connected to each other through a power supply line (210), and the electronic price display module (300) can operate by receiving power from the solar cell power supply module (101) through the power supply line (210).

[0040] The supercapacitor (140) is connected to a power supply line (210), and the power supply line (210) can be connected to an electronic price display module (300) that does not have a built-in battery. The power supply line (210) can include first and second power supply lines (211, 212).

[0041] The first power supply line (211) is for transmitting power generated from the solar cell power supply module (101) to the electronic price display module (300), and the second power supply line (212) can be a neutral line.

[0042] The solar cell power supply module (101) and the auxiliary solar cell (122) are connected to each other through an auxiliary power receiving line (220), and the solar cell power supply module (101) can receive power from the auxiliary solar cell (122) through the auxiliary power receiving line (220).

[0043] The solar cell power supply module (101) and the auxiliary solar cell (122) can be connected in parallel to each other through an auxiliary power receiving line (220), and the number of auxiliary solar cells (122) can vary depending on the required power generation capacity and light irradiation environmental factors.

[0044] The power rail module (200) may include a power rail housing (230). The power rail housing (230) may be installed on a shelf (20). The power rail housing (230) may be installed along the longitudinal direction of the shelf (20). The power rail housing (230) may be installed on each of a plurality of shelves (20) on a shelf display stand. A metal rail or a conductive strip may be installed on the power rail housing (230). The power rail housing (230) may enable attachment and detachment of various tags, including an electronic price tag module (300) and an auxiliary solar cell (122), and may provide a path for installing external power signal lines and data communication lines. First and second power supply lines (211, 212) may be mounted on the plurality of power rail housings (230). A solar cell power supply module (101) can be installed in the power rail housing (230), and an electronic price display module (300) and an auxiliary solar cell (122) can be configured to be detachably attached to the power rail housing (230). The electronic price display module (300) and the auxiliary solar cell (122) can be configured to be installed at any location in the power rail housing (230).

[0045] When an electronic price display module (300) is fastened to a power rail housing (230), an electrical terminal of the electronic price display module (300) can be configured to be connected to a first power supply line (211), and when an auxiliary solar cell (122) is fastened to the power rail housing (230), an electrical terminal of the auxiliary solar cell (122) can be configured to be connected to a second power supply line (212).

[0046] FIG. 4 is a schematic diagram illustrating a power rail electronic shelf system using solar cells according to an embodiment of the present invention installed on a shelf display stand.

[0047] Referring to FIGS. 1 and 4, a power rail electronic shelf system (10) using solar cells according to an embodiment of the present invention can be installed on a shelf display stand (30).

[0048] A plurality of shelves (20a to 20d) are installed on the shelf display stand (30), and various products can be displayed on each of the plurality of shelves (20a to 20d). A power rail housing (230) is installed on each of the plurality of shelves (20a to 20d), and at least one electronic price display module (300) and at least one auxiliary solar cell (122) can be fastened to each power rail housing (230).

[0049] At one point of the shelf display stand (30), a solar cell power supply module (101) may be installed that supplies driving power to a plurality of electronic price display modules (300) installed on each of a plurality of shelves (20a to 20d) and receives power generated from a plurality of auxiliary solar cells (122) installed on each of the plurality of shelves (20a to 20d), i.e., manages the power thereof in an integrated manner. Integrated first and second power supply lines are connected to the solar cell power supply module (101), and the integrated first and second power supply lines may branch off to each of the plurality of shelves (20a to 20d) and branch off to first and second power supply lines (211, 212) to the power rail housing (230) of each shelf, and may be electrically connected to at least one electronic price display module (300) fastened to the power rail housing (230) and at least one auxiliary solar cell (122).

[0050] The solar cell power supply module (101) installed at one point of the shelf display stand (30) can be equipped with a battery and supercapacitor of higher capacity than the solar cell power supply module (101) in FIGS. 2 and 3 in order to be in charge of driving power of the electronic price display modules (300) on a plurality of shelves (20a to 20d).

[0051] FIG. 5 schematically illustrates a power rail electronic shelf system using solar cells according to various embodiments of the present invention, and FIG. 6 schematically illustrates an auxiliary solar cell rotating and moving on a moving rail.

[0052] Referring to FIGS. 1, 5, and 6, the power rail module (200) of the power rail electronic shelf system (10) using solar cells according to various embodiments may further include a movable rail portion (240). The movable rail portion (240) may be installed on the lower side of the power rail housing (230). The upper surface of the movable rail portion (240) and the lower surface of the power rail housing (230) may be in contact with each other and may be fastened to each other. The movable rail portion (240) may be installed along the longitudinal direction of the power rail housing (230).

[0053] An auxiliary power receiving line (220) drawn from a solar cell power supply module (101) can be installed in a moving rail section (240) along the longitudinal direction of the moving rail section (240). In addition, a power supply line (210) drawn from a solar cell power supply module (101) can be installed in a power rail housing (230) along the longitudinal direction of the power rail housing (230).

[0054] An auxiliary solar cell (122) can be installed in a detachable type on the moving rail section (240), and an electronic price display module (300) can be installed in a detachable type on the power rail housing (230).

[0055] The movable rail unit (240) may be provided with a track that allows the auxiliary solar cell (122) to move along the longitudinal direction of the movable rail unit (240) and a rail that is movable on the track. The auxiliary solar cell (122) may be configured to be fastened to a point of the rail. The movable rail unit (240) may include an electric motor that allows the auxiliary solar cell (122) to slide along the movable rail unit (240). The electric motor allows the rail to move on the track, and allows the auxiliary solar cell (122) to move according to the movement of the rail. In various embodiments, the movable rail unit (240) may be provided with a rotation device for rotating the auxiliary solar cell (122) within a predetermined angular range about a connection point between the movable rail unit (240) and the auxiliary solar cell (122). The rotation device may be configured to rotate a track installed on a movable rail portion (240). As the track rotates, the rail within the track may be configured to rotate, thereby allowing the auxiliary solar cell (122) to rotate. The movable rail portion (240) may include a track rotation motor for such track rotation.

[0056] The power control unit (110) can detect the installation location of the installed electronic price display module (300) when at least one electronic price display module (300) is installed on the power rail housing (230). In addition, the power control unit (110) can detect the installation location of the auxiliary solar cell (122) on the moving rail unit (240) when the auxiliary solar cell (122) is installed on the moving rail unit (240). In various embodiments, the power control unit (110) can detect the installation location of the electronic price display module (300) or the auxiliary solar cell (122) at a specific location on the line by measuring the reflection of a signal transmitted to each of the power supply line (210) and the auxiliary power receiving line (220), but the method of detecting the installation location is not limited thereto.

[0057] The power control unit (110) can monitor the amount of power produced by the auxiliary solar cell (122). In order to adjust the amount of power produced by the auxiliary solar cell (122), the power control unit (110) controls the motor on the moving rail unit (240) to change the position of the auxiliary solar cell (122) and can monitor the amount of power produced by the auxiliary solar cell (122) at the changed position.

[0058] If the power control unit (110) determines that the auxiliary solar cell (122) overlaps with an arbitrary electronic price display module (300) in the process of changing the position of the auxiliary solar cell (122) based on the position information of the electronic price display module (300) and the current auxiliary solar cell (122), the power control unit (110) can control the track rotation motor to rotate the auxiliary solar cell (122) at a predetermined angle and control the electric motor to move the position of the auxiliary solar cell (122). The power control unit (110) can detect an area where the auxiliary solar cell (122) can be located based on the position information of the electronic price display module (300) and the current auxiliary solar cell (122), determine whether the auxiliary solar cell (122) can move to the detected area, and if it is determined that the auxiliary solar cell (122) can move, the auxiliary solar cell (122) can move to the area.

[0059] The embodiments of the present invention described above may be implemented in the form of program commands that can be executed through various computer components and recorded on a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, etc., either singly or in combination. The program commands recorded on the computer-readable recording medium may be specially designed and configured for the present invention or may be known and available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specifically configured to store and execute program commands, such as ROMs, RAMs, and flash memories. Examples of program commands include not only machine language codes generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc. Hardware devices may be changed into one or more software modules to perform processing according to the present invention, and vice versa.

[0060] The specific implementations described in the present invention are exemplary embodiments and do not limit the scope of the present invention in any way. For the sake of brevity, descriptions of conventional electronic components, control systems, software, and other functional aspects of the systems may be omitted. In addition, the lines connecting or connecting members between components illustrated in the drawings are merely representative of functional connections and / or physical or circuit connections, and may be replaced or represented as various additional functional connections, physical connections, or circuit connections in an actual device. In addition, unless specifically mentioned as “essential,” “important,” etc., a component may not be absolutely necessary for the application of the present invention.

[0061] Although the detailed description of the present invention has been described with reference to preferred embodiments of the present invention, it will be understood by those skilled in the art or having ordinary knowledge in the art that various modifications and changes can be made to the present invention without departing from the spirit and technical scope of the present invention as set forth in the claims below. Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

[0062] The present invention has industrial applicability in that it can improve the usability of electronic price display modules installed on shelves and increase the efficiency of store management by providing a power rail electronic shelf system that can be free from size and shape restrictions of electronic price display modules and reduce manufacturing costs by using an electronic price display module that does not have a built-in battery and does not use its own solar cell.

Claims

1. Solar cell power supply module including power control unit, main solar cell, battery and supercapacitor; An electronic price display module detachably installed on a power rail module installed on a shelf; and Including an auxiliary solar cell detachably installed in the above power rail housing; The above power control unit charges the power generated from the main solar cell and the auxiliary solar cell to the battery and the supercapacitor and supplies the charged power to the electronic price display module. Power rail electronic shelving system using solar cells.

2. In paragraph 1, The above power rail module includes a power rail housing, a power supply line embedded in the power rail housing and connecting the power control unit and the electronic price display module to each other. Power rail electronic shelving system using solar cells.

3. In paragraph 2, The above power rail module is embedded in the power rail housing and further includes an auxiliary power receiving line connecting the power control unit and the auxiliary solar cell to each other. Power rail electronic shelving system using solar cells.

4. In paragraph 2, The supercapacitor is connected to the above power supply line. Power rail electronic shelving system using solar cells.

5. In paragraph 1, In a shelf display unit including a plurality of shelves, the power rail housing is installed on each of the plurality of shelves, One solar cell power supply module that manages power by integrating the electronic price display module and auxiliary solar cell installed in each of the power rail housings installed on each of the above multiple shelves is installed at one point of the shelf display. Power rail electronic shelving system using solar cells.

6. In paragraph 1, The above power rail module includes a power rail housing, a moving rail part connected to the power rail housing, a power supply line embedded in the power rail housing and connecting the power control part and the electronic price display module to each other, and an auxiliary power receiving line embedded in the power rail housing and connecting the power control part and the auxiliary solar cell to each other. The above auxiliary solar cell is movable on a part of the epithelial moving rail. Power rail electronic shelving system using solar cells.

7. In paragraph 6, The above power control unit monitors the amount of power generated by the auxiliary solar cell. Power rail electronic shelving system using solar cells.

8. In paragraph 7, The above power control unit controls the motor on the moving rail unit based on the amount of power generated by the auxiliary solar cell to change the position of the auxiliary solar cell. Power rail electronic shelving system using solar cells.

9. In paragraph 1, The above solar cell power supply module further includes a communication device for communicating status information of at least one of the electronic price display module and the auxiliary solar cell with an external monitoring server. Power rail electronic shelving system using solar cells.

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