KR20160150407A - Power supply device and electronic shelf lavel apparatus including the same - Google Patents

Abstract

According to an embodiment, a power supply device comprises: a power input connector connected to a power supply source to receive first DC power, inputted through the power supply source; a power detecting unit configured to detect a voltage value of first DC power, inputted through the power input connector, and configured to output the first DC power to either one of a first route or a second route in accordance with the detected voltage value of the DC power; a power output terminal formed in the first route to output the first DC power, supplied through the power detecting unit, to the outside; and a DC-DC conversion unit formed in the second route to convert the first DC power, outputted through the power detecting unit, into second DC power and output the converted second DC power to the power output terminal. The power detecting unit controls a route of the first DC power, inputted through the power input connector, in accordance with an input voltage value based on a type of the power supply source and a standard of the power supply source wherein the power supply source is connected to the power input connector.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power supply device and an electronic price display device including the power supply device,

An embodiment relates to a power supply device and an electronic price display device including the same.

Typically, in a retail store, paper labels are used to display product information such as sale price or discount information, unit price, and country of origin for products on shelves. In the price display method using the paper label, when the product information is changed or the product display position is changed, the paper label which is in use has to be discarded and a new paper label has to be created. Therefore, maintenance costs are incurred constantly. Waste paper is wasted, which has a negative impact on environmental protection.

Therefore, research and development of an electronic price indicator (or an electronic shelf label (ESL)) as a means for replacing a conventional paper label is actively carried out.

The electronic price indicator receives price related information of a corresponding commodity from a central control center (server) through a wireless device (for example, a gateway), displays the received price related information, and provides information on the commodity in real time It does.

At this time, the electronic price indicator displays the frequent information change or discount information for the corresponding product in real time, thereby providing the convenience of the user.

In recent years, electronic price indicators have been used not only for price information, but also for a lot of information such as store symbol, promotion image, barcode, product name, product image, Is required to be displayed.

The electronic price display system includes a server, a gateway, and a plurality of electronic price indicators.

At this time, the gateway and the server are connected to a wired system, and the gateway and the plurality of electronic price indicators are wirelessly connected, and the gateway and the electronic price indicator perform unidirectional communication or bidirectional communication according to the type of the electronic price indicator.

1 is a view showing an electronic price indicator according to the prior art.

1, an electronic price indicator of a first type includes a battery 1, a power supply unit 2, a first antenna 3, a first communication unit 4, a second antenna 5, (6) and a display unit.

In the first type, the power supply unit includes a battery 1 and is driven by power supplied through the built-in battery 1 as driving power.

The first antenna 3 and the first communication unit 4 receive various data through communication with the server. The first antenna 3 and the first communication unit 4 may communicate with the server according to an RF communication scheme.

The second antenna 5 and the second communication unit 6 communicate with the terminal of the administrator to receive various data and control signals. The near field communication module of the second antenna 5 and the second communication unit 6 is an NFC (Near Field Communication) module.

The power supply unit 2 generates driving power required by various components using the power supplied through the battery 1.

The display unit 7 is an EPD (E-Paper Display) device and displays data (product information) received through the first communication unit 4 or the second communication unit 6.

However, in the above-described electronic price indicator, there is a problem that a battery for supplying a driving power must be provided in the tag itself, thereby increasing the total volume of the product, and when the battery is exhausted, Or it is troublesome to replace the battery.

In the embodiment of the present invention, a power supply rail is formed in a profile in which a plurality of electronic price indicators are mounted, while eliminating the battery included in the electronic price indicator, and a driving power source is supplied to a plurality of electronic price indicators mounted on the profile And an electronic price display device including the power supply device.

In addition, in the embodiment of the present invention, a power supply device that receives power from various power sources and supplies power in different paths according to the voltage level of the supplied power source to selectively perform a power conversion operation, And an electronic price display device including the same is provided.

It is to be understood that the technical objectives to be achieved by the embodiments are not limited to the technical matters mentioned above and that other technical subjects not mentioned are apparent to those skilled in the art to which the embodiments proposed from the following description belong, It can be understood.

A power supply according to an embodiment of the present invention includes a power input connector connected to a power supply source and receiving a first DC power input through the power supply source; A power sensing unit sensing a voltage value of a first DC power input through the power input connector and outputting the first DC power to either the first path or the second path according to a voltage value of the sensed DC power, ; A power output terminal formed in the first path and outputting a first DC power supplied through the power sensing unit to the outside; And a DC-DC converting unit formed in the second path and converting the first DC power outputted through the power sensing unit into a second DC power and outputting the converted second DC power to the power output terminal The power sensing unit controls a path of the first DC power input through the power input connector according to the type of the power source connected to the power input connector and the input voltage according to the specification of the power source.

The power output terminal may be connected to a profile formed on the front of the shelf and having a power supply rail for supplying driving power to the power terminal of the electronic price indicator, And outputs a second DC power source.

The voltage values of the first DC power supply and the second DC power supply output through the power output terminal are equal to each other.

The power sensing unit outputs the first DC power to the first path when the voltage value of the first DC power input through the power input connector falls within a preset reference range, Wherein the first direct current power source outputs the first direct current power source to a second path when a voltage value of the input first direct current power source deviates from a preset reference range, and the direct current / direct current converters are arranged on the second path, And converts the direct current power into a second direct current power having a voltage value within the reference range.

The power sensing unit may include a Zener diode including a first end connected to the output terminal of the power input connector and a second end grounded, a first end connected to the first end of the power input connector, A first switching element including a second end connected to a first power output terminal connected to the second power supply input terminal and a third end connected to a third end of the second switching device and a third end of the third switching device, A second switching element including a first end connected to the first end, a first end connected to the first end of the first switching element, a second end connected to the first end of the Zener diode, and a third end grounded; A second stage connected to an output end of the power input connector, a second stage connected to a second power output stage connected to the DC to DC conversion unit, a second stage connected to the third stage of the first switching device, It comprises a third stage connected to the third end and the referred element.

In addition, when the first DC power having a voltage value within a reference range is applied through the power input connector, the first switching element is turned on and the second and third switching elements are turned off, The first DC power supply is output through the first power output terminal and the first DC power supply having a voltage value exceeding the reference range is applied through the power input connector, And the second and third switching elements are turned on so that the first DC power is output through the second power output terminal.

An antenna for receiving information transmitted from outside; And a communication module for controlling each component according to the information received through the antenna.

The electronic price indicator may further include a switch disposed between the power sensing unit, the DC-DC converter, and the power output terminal, .

A departure detection unit for detecting departure of the profile; And a notification unit for generating a notification signal according to the detection of the departure detection unit, wherein the communication module selectively activates the operation of the notification unit according to information received through the antenna, When the deviation of the profile is detected in the activated state, the notification signal is generated.

The power supply input connector is connected to the power source input connector through a power input connector and detects an abnormal state of the first DC power source, The first protection unit blocks the first protection unit.

The apparatus further includes a second protection unit disposed between the switch and the power output terminal and for interrupting the first DC power or the second DC power output through the switch through temperature sensing.

The electronic device further includes a third protection unit disposed between the switch and the power output terminal for preventing instantaneous current supply to the electronic price indicator.

According to another aspect of the present invention, there is provided an electronic price display device including: a shelf including a depressed portion recessed inwardly on a front surface and a protrusion protruding inward of the depressed portion on an upper surface and a lower surface of the depressed portion; A first engaging portion extending outwardly from an upper surface of the body, and a second engaging portion extending outwardly from a lower surface of the body, wherein the engaging portion is formed with an insertion groove that is recessed inwardly on an upper surface and a lower surface of the body, A first power supply rail formed on a lower surface of the first coupling portion, and a second power supply rail formed on an upper surface of the second coupling portion; An electronic price indicator mounted on the profile and including a first power terminal connected to the first power supply rail on an upper surface thereof and a second power terminal connected to the second power supply rail on a lower surface; And a power supply mounted on the shelf and electrically connected to the first and second power supply rails of the profile to supply DC power to the first and second power supply rails.

The power supply apparatus may further include a power supply source for supplying a DC power source and a DC power source for supplying DC power to the first and second power supply rails of the profile, And a power supply unit.

The power supply source includes at least one of a battery and an adapter, and the power supply unit selectively converts the DC power according to an input voltage according to a standard of the adapter when the power supply source is an adapter.

The plurality of electronic price indicators are commonly supplied with driving power through the first power supply rail and the second power supply rail, which are the same as each other.

Further, the first power supply rail is a positive power supply rail, and the second power supply rail is a ground rail.

According to the embodiment of the present invention, the total volume of the electronic price indicator can be reduced by removing the battery included in the electronic price indicator.

In addition, according to the embodiment of the present invention, by supplying driving power of the electronic price indicator through the power supply rail formed in the PROFIEL, not only the battery consumption cost can be reduced, but also the time and manpower required for battery replacement are unnecessary It is possible to lower the product cost by reducing the management cost.

According to the embodiment of the present invention, power supply rails connected to each other are formed in one profile, and a plurality of electronic price indicators are mounted on the formed power supply rails, so that the driving power of a plurality of electronic price indicators can be collectively .

In addition, according to the embodiment of the present invention, the input power is supplied through different paths depending on the type of the input power source, so that both the wall power and the battery power can be used according to the usage environment of the shelf. User satisfaction can be improved.

In addition, according to the embodiment of the present invention, since the power supply device includes the protection circuit that can solve the dangerous situation caused by the input power supply source and the dangerous situation generated by the output power supply, The reliability of the apparatus can be improved.

1 is a view showing an electronic price indicator according to the prior art.
FIG. 2 is a perspective view of a merchandise display panel provided with an electronic price display device according to an embodiment of the present invention.
3 is a perspective view of the shelf 100 shown in Fig.
4 is a perspective view of the profile 200 shown in FIG.
5 is a perspective view of the electronic price indicator 300 shown in FIG.
FIG. 6 is a view showing a combination of a power supply source and a power supply unit according to the first embodiment of the present invention.
FIG. 7 is a view showing a combination of a power supply source and a power supply unit according to the second embodiment of the present invention.
FIG. 8 is a block diagram showing an internal configuration of an electronic price indicator 300 according to an embodiment of the present invention.
9 is a block diagram illustrating an internal configuration of a power source according to the first embodiment of the present invention.
10 is a block diagram illustrating an internal configuration of a power source according to a second embodiment of the present invention.
11 is a block diagram showing an internal configuration of a power supply unit according to an embodiment of the present invention.
12 is a circuit diagram showing a detailed configuration of the power sensing unit shown in FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being 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 concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Combinations of the steps of each block and flowchart in the accompanying drawings may be performed by computer program instructions. These computer program instructions may be embedded in a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus so that the instructions, which may be executed by a processor of a computer or other programmable data processing apparatus, Thereby creating means for performing the functions described in the step. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory It is also possible to produce manufacturing items that contain instruction means that perform the functions described in each block or flowchart illustration in each step of the drawings. Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible for the instructions to perform the processing equipment to provide steps for executing the functions described in each block and flowchart of the drawings.

Also, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative embodiments, the functions mentioned in the blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may sometimes be performed in reverse order according to the corresponding function.

FIG. 2 is a perspective view of a merchandise display panel provided with an electronic price display device according to an embodiment of the present invention.

Referring to FIG. 2, the merchandise display rack includes a shelf 100, a profile 200, an electronic price indicator 300, and a power supply 400.

The shelf 100 has a first part erected in a vertical direction from the floor and a second part extending in a direction perpendicular to the first part from the front surface of the first part, that is, horizontally from the floor, And a second portion for allowing the first portion to be exposed.

A plurality of commodities may be displayed on the second portion.

A profile 200 is coupled to the front of the second part of the shelf 100.

Preferably, the recess 200 is recessed inwardly (preferably in front of the second portion) of the shelf 100, and the profile 200 is inserted and mounted on the inner upper surface and the inner lower surface of the depression A protrusion is formed.

The projections project inward from the inner upper surface and the inner lower surface of the depressed portion, and extend in the lateral direction of the depressed portion.

An insertion groove into which the projection is inserted is formed on the upper surface and the lower surface of the profile 200.

Accordingly, the profile 200 can be fixed and mounted on the shelf 100 by inserting the protrusion into the insertion groove in a sliding manner.

An electronic price indicator 300 is mounted in front of the profile 200.

In the profile 200, power supply rails extending in the lateral direction are formed.

In addition, the electronic price indicator 300 has a power terminal protruded upward and downward to receive power.

Accordingly, the electronic price indicator 300 is mounted and fixed to the profile 200 such that the power terminal is in contact with the power supply rail.

The electronic price indicator 300 receives driving power through the power supply rail through the power supply terminal and selectively operates by the supplied driving power to display information on the products displayed on the shelf .

A power supply 400 is additionally mounted on the shelf 100 and the power supply 400 is electrically connected to the profile 200.

Preferably, the power supply 400 is electrically connected to a power supply rail formed in the profile 200.

The power supply unit 400 receives power from a power supply source and selectively supplies the supplied power to the power supply rails of the profile 200.

Hereinafter, each of the above components will be described in more detail.

Fig. 3 is a perspective view of the shelf 100 shown in Fig. 2, Fig. 4 is a perspective view of the profile 200 shown in Fig. 2, and Fig. 5 is a perspective view of the electronic price indicator 300 shown in Fig.

Hereinafter, the structure of the shelf 100, the profile 200, and the electronic price indicator 300 will be described in more detail with reference to FIGS. 3 to 5. FIG.

The shelf 100 is a merchandising shelf installed in a store such as a supermarket, a large mart, and a convenience store.

The shelf 100 is composed of a plurality of items so that a plurality of goods can be separated and displayed.

At the front of the shelf 100 is formed a depression 120 recessed into the body of the shelf.

The size of the depression 120 corresponds to the size of the profile 200 and provides a seating space for the profile 200 to be seated therein.

On the upper surface of the depression 120, a protrusion 130 protruding inward is formed. The protrusion 130 is formed to extend from the left end to the right end of the depression 120, that is, in the lateral direction of the depressed portion 120.

Further, a protrusion 130 protruding in the inner direction by a predetermined length is formed on the lower surface of the depression 120. In other words, protrusions facing each other are formed on the upper surface and the lower surface of the depression 120, respectively.

4, the profile 200 includes a body 210 and the body 210 is fitted to the protrusion 130 of the depression 120 on the upper and lower surfaces of the body 210 Respectively. As shown in Fig.

The insertion groove 220 may be formed to have a depth corresponding to the height of the protrusion 130. The insertion groove 220 may be formed to extend in the lateral direction on the upper surface and the lower surface of the body 210, Respectively.

The body 210 includes a first coupling portion 240 extending forward from an upper surface of the body 210 and contacting the upper surface of the electronic price indicator 300, And a second engaging part 250 which is extended to the lower surface of the electronic price indicator 300 and contacts the lower surface of the electronic price indicator 300.

A depression 230 is formed in the front of the body 210 by the first and second engaging parts 240 and 250.

The first coupling portion 240 and the second coupling portion 250 face each other and are formed on the upper surface and the lower surface of the body 210, respectively.

A first power supply rail 260 extending in a transverse direction is formed on a lower surface of the first coupling part 240. A second power supply rail 260 is formed on the upper surface of the second coupling part 250, A supply rail 270 is formed.

The first power supply rail 260 is a positive power supply rail to which driving power is supplied and the second power supply rail 280 is a grounding rail for grounding.

A connector (not shown) connected to the first power supply rail 260 and the second power supply rail 270 is disposed on the rear surface of the profile 200.

The connector of the profile 200 is connected to the power supply device 400 and receives power from the power supply device 400.

5, the electronic price indicator 300 includes a body 310, and on the upper surface of the body 310, a first power supply rail 260 electrically connected to the first power supply rail 260 of the profile 200, And a second terminal 340 electrically connected to the second power supply rail 270 of the profile 200 is formed on the lower surface of the body 310. [

The first terminal 330 protrudes to the outside from the upper surface of the body 310 and the second terminal 340 protrudes from the lower surface of the body 310 to the outside in the same manner as the first terminal 330 .

The first terminal 330 and the second terminal 340 have an elastic force so that when the electronic price indicator 300 is mounted on the profile 200, A binding force of the price indicator 300 is provided so that the electronic price indicator 300 can be fixed to the profile 200. [

The body 310 includes a display area 320 on which goods information is displayed.

The display area 320 may include a first display area 321 in which a product name is displayed and a second display area 322 in which price information of the product is displayed.

When the electronic price indicator 300 is placed on the profile 200, the rear surface of the body 310 of the electronic price indicator 300 is brought into contact with the front surface of the body 210 of the electronic price indicator 300, The first terminal 330 formed on the upper surface of the body 310 contacts the lower surface of the first coupling portion 240 and the second terminal 340 contacts the second coupling portion 250.

More specifically, the first terminal 330 is in contact with a first power supply rail 260 formed on a lower surface of the first coupling portion 240, and the second terminal 340 is in contact with a second power supply rail And the second power supply rail 270 formed on the upper surface of the second power supply rail 250.

The electronic price indicator 300 receives driving power through the first terminal 330 and the second terminal 340 and is driven by the supplied driving power to receive product information transmitted from the outside, And displays the received goods information.

FIG. 6 is a view showing a coupling relationship between a power supply source and a power supply unit according to the first embodiment of the present invention, FIG. 7 is a view showing a combination of a power supply source and a power supply unit according to a second embodiment of the present invention to be.

6 and 7, the power supply unit 440 has an input connector 430 at one end and an output connector (not shown) at the other end.

The input connector 430 is connected to a power source and the output connector is connected to a connector connected to a power supply rail of the profile 200.

6, the power supply source includes an adapter 410 inserted into an outlet of a wall power source to receive commercial AC power, convert the received commercial AC power to DC power and output the DC power, And a connector 420 inserted into the input connector 430 of the connector 440 and outputting the DC power converted through the adapter 410.

The power supply unit 440 in the first embodiment is connected to the first power supply source corresponding to the adapter 410 and receives DC power from the first power supply source.

In this case, the voltage of the power source output from the first power source may have a value between 2.0V and 3.6V, and alternatively may have a value between 3.6V and 24V. That is, the voltage output through the connector 420 may vary according to the standard of the adapter 410.

7, the power source includes a battery 450 for charging a power source, discharging the charged power source to output DC power, and a battery 450 inserted in the input connector 430 of the power source unit 440 And a connector 460 for outputting a DC power discharged through the battery 450.

The power supply unit 440 in the second embodiment is connected to a second power supply source corresponding to the battery 450 and receives DC power from the second power supply source.

At this time, the voltage of the power source output from the second power source may have a value between 2.0V and 3.6V.

When the power supply source is connected to the input connector 430, the power supply unit 440 receives the DC power supplied from the power supply source, detects the voltage of the received DC power, And the received DC power is output in different paths depending on the type of the power source or the magnitude of the voltage.

FIG. 8 is a block diagram showing an internal configuration of an electronic price indicator 300 according to an embodiment of the present invention.

8, the electronic price indicator 300 includes a connector 301, a protection circuit 302, a first antenna 303, a second antenna 304, a communication unit 305, a display module 306, (307) and a switch (308).

The connector 301 is connected to a power supply rail of the profile 200 and receives driving power supplied from the connected power supply rails and supplies the driving power to the components constituting the electronic price indicator 300.

The connector 310 is a first terminal 330 and a second terminal 340 formed on the body 310 of the electronic price indicator 300.

The protection circuit 302 senses an abnormal state of the power supplied through the connector 301 and performs a shutdown operation of the supplied power according to whether the abnormal state is detected.

Preferably, the protection circuit 302 is configured such that when the electronic price indicator 300 is mounted on the profile 200, the surge voltage and surge voltage of the high voltage induced through the power supply rails of the profile 200, So as not to be applied to each component of the apparatus.

The protection circuit 302 may be a surge protection unit.

The protection circuit 302 may be implemented with a TVS diode and a capacitor.

The first antenna 303 and the second antenna 304 receive various data transmitted from the outside.

Here, the first antenna 303 and the second antenna 304 are antennas for receiving signals of different bands.

Here, the communication method of the first antenna 303 and the second antenna 304 includes a data communication method and a short distance communication method.

For example, the short-range communication method includes ZigBee, Wi-Fi, Bluetooth, Z-wave and Near Field Communication (NFC).

Here, the first antenna 303 is an antenna for short-range communication, and the second antenna 304 is an antenna for LF (Low Frequency) communication.

Accordingly, the first antenna 303 may be an antenna of 2.4 GHz band, and the second antenna 304 may be an antenna of 13.56 MHz band.

The communication unit 305 receives data transmitted from the outside through the first antenna 303 and the second antenna 304 and transmits each component constituting the electronic price indicator 300 according to the received data .

At this time, the communication unit 305 receives a signal for managing the electronic price indicator 300, information on a product to be displayed on the electronic price indicator 300, and moving image data or event data on the product .

The communication unit 305 performs a control operation for receiving and displaying the data according to a wake up signal received through the first antenna 303 and the second antenna 304. When the control operation is completed, Enters the sleep mode.

The display module 306 receives the product-related information transmitted through the communication unit 305. The display module 306 may be implemented as an electronic paper (E-paper).

The product related information displayed on the display module 306 may include a store symbol, a promotional image, a barcode, a product name, a product image, a country of origin information, a product price, and sale information.

The driving unit 307 controls driving of the display module 306 so that the product related information transmitted through the communication unit 305 is displayed on the display module 306.

The switch 308 is disposed between the communication unit 305 and the display module 306 and provides a transmission path for data transmitted and received between the communication unit 305 and the display module 306.

In other words, when the communication unit 305 is turned on, the switch 308 is also turned on to connect the path between the communication unit 305 and the display module 306. In addition, when the communication unit 305 is turned off, the switch 308 is also turned off to cut off the path between the communication unit 305 and the display module 306.

9 is a block diagram illustrating an internal configuration of a power source according to the first embodiment of the present invention.

Referring to FIG. 9, the power source according to the first embodiment may be a power source supplied by an adapter.

Accordingly, the power supply source includes a socket 401 of a wall power source, preferably a plug inserted in the socket 401 to receive a commercial AC power source corresponding to the wall power source, And a power connector 403 for outputting the DC power converted through the AC-DC converter 402 to the power supply unit 440. The AC-DC converter 402 converts the DC power supplied from the AC-

The AC-DC converting unit 402 converts the commercial AC power to DC power and outputs the DC power. The voltage of the DC power may be varied according to the specification of the AC-DC converter 402.

That is, the voltage of the DC power source output through the AC-DC converter 402 may have a value between 2.0V and 3.6V, and alternatively may have a value between 3.6V and 24V.

10 is a block diagram illustrating an internal configuration of a power source according to a second embodiment of the present invention.

Referring to FIG. 10, the power source according to the second embodiment is a battery.

Accordingly, the power source includes a battery pack 404, a coupling member 405, and a power connector 406.

The battery pack 404 stores a DC power source, selectively performs a discharging operation, and outputs the stored DC power.

The battery pack 404 may include a plurality of battery cells.

A plurality of battery cells included in the battery pack need to uniformize voltage of each battery cell in order to obtain stability, life span, and high output.

Accordingly, the power source allows the battery cells of the battery pack 404 to be charged or discharged through a separate battery control device (not shown) so that each battery cell can have a proper voltage.

On the other hand, it is difficult to stably maintain the equilibrium state due to various factors such as a change in the internal impedance of the plurality of battery cells. Accordingly, in a separate battery management system (not shown) Balancing function.

For example, due to the difference in the discharge rate of the battery cells in the battery pack, there is a difference in the remaining capacity (STATE OF CHARGE, hereinafter referred to as SOC) between the battery cells in the battery pack. Accordingly, the power supply source can constitute a separate circuit for charging (BOOST) and / or discharging (BUCK) for each battery cell in order to overcome the capacity imbalance between the battery cells.

The engaging member 405 fixes the battery pack 404 to one side of the shelf 100.

The coupling member 405 may be made of a magnetic material depending on the material of the shelf 100 so that the battery pack 404 can be easily attached to the shelf 100, .

The power supply connector 406 outputs a DC power stored in the battery 404 according to the discharge of the battery pack 404.

At this time, the voltage of the direct current power output through the battery 404 may have a value between 2.0V and 3.6V.

11 is a block diagram showing an internal configuration of a power supply unit according to an embodiment of the present invention.

11, the power supply unit 440 includes a power input connector 501, a first protection unit 502, a power detection unit 503, a DC-DC conversion unit 504, a first antenna 505, A second antenna 506, a communication module 507, a switch 508, a second protection unit 509, a third protection unit 510, a power output terminal 511, a first notification unit 512, A departure detection unit 513 and a second notification unit 514. [

The power input connector 501 is connected to the power supply connectors 403 and 406 of the power supply source and receives the DC power supplied through the power supply connectors 403 and 406.

At this time, the power input connector 501 may receive a DC voltage between 2.0 V and 3.6 V or a DC voltage between 3.6 V and 24 V, depending on whether the power source is the adapter, or alternatively, A DC voltage between 2.0 V and 3.6 V can be received.

The first protection unit 502 detects an abnormal state of the DC power input through the power input connector 501 and cuts off the output of the DC power depending on whether the abnormal state is detected.

Preferably, the first protection unit 502 is an RVP (Reverse Voltage Protection) circuit and blocks the DC voltage of the DC voltage from being changed through the power input connector 501.

The first protection unit 502 may be a diode that prevents reverse voltage flow.

The power sensing unit 503 senses the voltage value of the DC power input through the power input connector 501 and outputs the input DC power in different paths according to the sensed voltage value.

In other words, the power sensing unit 503 senses the voltage value of the DC power input through the power input connector 501 and determines the power source connected to the power input connector 501.

If the voltage value of the input DC power exceeds a voltage of 3.6 V according to the power supply source being an adapter, the voltage value is converted into a voltage value suitable for driving the electronic price indicator 300 .

In other words, the electronic price indicator 300 is driven by a DC voltage within a range of 2.0 to 3.6V.

If the power supply source is a battery, the DC voltage applied from the battery is a voltage suitable for the driving power source of the electronic price indicator 300, so that the power sensing unit 503 may be connected to the power input connector 501 Bypasses the input DC power, and outputs the input DC power to the rear end (specifically, the output terminal that outputs power to the profile 200).

If the power source is the adapter, the power sensing unit 503 determines whether the voltage value of the DC power input from the adapter is a voltage between 2.0 and 3.6 V suitable for driving the electronic price indicator 300, It is detected whether the voltage exceeds.

If the voltage value of the DC power input from the adapter is 2.0 to 3.6 V, the power sensing unit 503 bypasses the DC power, and outputs the input DC power to the subsequent stage.

When the voltage value of the DC power input from the adapter exceeds 3.6 V, the power sensing unit 503 cuts off the output of the DC power supply, and the DC power supplied thereto is supplied to the DC-DC converter 504 ).

The details of the power sensing unit 503 and its operation will be described in more detail below.

The first antenna 505 and the second antenna 506 receive various data transmitted from the outside.

Here, the first antenna 505 and the second antenna 506 are antennas that receive signals of different bands.

Here, the communication method of the first antenna 505 and the second antenna 506 includes a data communication method and a short distance communication method.

For example, the short-range communication method includes ZigBee, Wi-Fi, Bluetooth, Z-wave and Near Field Communication (NFC).

Here, the first antenna 505 is an antenna for short-range communication, and the second antenna 506 is an antenna for LF (Low Frequency) communication.

Accordingly, the first antenna 505 may be an antenna of 2.4 GHz band, and the second antenna 506 may be an antenna of 13.56 MHz band.

The communication module 507 receives data transmitted from the outside via the first antenna 505 and the second antenna 506 and transmits the data to the respective components constituting the power supply unit 440 according to the received data .

Particularly, the communication module 507 receives the supply signal or the blocking signal of the DC power output to the electronic price indicator 300 through the first antenna 505 or the second antenna 506, And the output of the DC power supply is interrupted according to the supply signal or the shutoff signal.

Preferably, when the electronic price indicator 300 enters the wake-up mode, the communication module 507 receives the supply signal and outputs the DC power to the electronic price indicator 300 accordingly .

When the electronic price indicator 300 enters the sleep mode, the communication module 507 receives the blocking signal and outputs the blocking signal to the electronic price indicator 300, Power off.

The switch 508 outputs the DC power that is bypassed through the power sensing unit 503 or the DC power converted by the DC-DC converter 504 to the following stage in accordance with the control signal of the communication module 507 Or cut off.

The second protection unit 509 and the third protection unit 510 selectively operate according to the state of the DC power supplied to the electronic price indicator 300, that is, the profile 200, If an abnormality occurs, the DC power is turned off.

The second protection unit 509 may be a PTC that performs a switching operation according to a temperature, and selectively cuts off the DC power according to the temperature.

The first notification unit 512 is connected to the second protection unit 509 and the first notification unit 512 is connected to the second protection unit 509 according to the operation state of the second protection unit 509. [ (509) is shorted, and informs the outside of the information about the error state or the operation disabled state.

When the DC power source is instantaneously supplied in a state where the electronic price indicator 300 is installed, the third protection unit 510 may prevent the surge current Control power supply.

A power output terminal 511 is formed at an output terminal of the third protection unit 510. The power output terminal 511 is connected to a power supply rail of the profile 200 to supply the DC power to the power supply rail. Supply.

The power output terminal 511 may include a first terminal for supplying the power of the positive characteristic and a second terminal for grounding.

The departure detection unit 513 senses the state of the profile 200.

The detachment detecting unit 513 may be a reed sensor operated by a magnetic body attached to a specific region of the profile 200 and detects that the profile 200 is separated from the shelf 100 do.

The second notification unit 514 outputs information on the occurrence of the deviation of the profile 200 according to whether the profile 200 sensed through the deviation detection unit 513 is deviated or not.

The communication module 507 receives information on the operation state of the second notification unit 514 through the first antenna 505 or the second antenna 506 and transmits the information on the operation state of the second notification unit 514 to the second notification unit 514. [ Can be controlled.

For example, when the manager intentionally disconnects the profile 200 from the shelf 100 due to the management of the profile 200, the second notification unit 514 is prevented from operating.

12 is a circuit diagram showing a detailed configuration of the power sensing unit shown in FIG.

Referring to FIG. 12, the power sensing unit 503 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first resistor R1, And includes a resistor R2, a third resistor R3, a first Zener diode D1, a first switching device Q1, a second switching device Q2 and a third switching device Q3.

The first capacitor C1 includes a first end connected to the power input IN1 and a second end grounded.

The second capacitor C10 includes a first end connected to the first end of the first capacitor and the power input IN1, and a second end grounded.

The first resistor R1 includes a first end connected to the power input IN1 and a second end connected to the first end of the first Zener diode D1.

The first control diode D1 includes a first end connected to the second end of the first resistor R1 and a second end grounded.

The second resistor R2 is connected to the first end of the first resistor R1 and the first end of the first control diode D1 and the second end of the second switching element Q2 And a second stage.

The first switching element Q1 has a first end connected to the second end of the second switching element Q2 and the first end of the first resistor R1 and a second end connected to the first end of the first resistor R1, And a third stage connected to the third stage of the second switching device Q2.

The third capacitor C2 and the fourth capacitor C4 each include a first end connected to the second end of the first switching device Q1 and a second end grounded.

The second switching device Q2 includes a first end connected to the first end of the first switching device Q1 and a second end connected to the second end of the second resistor R2, And a third stage connected to the first stage.

The third resistor R3 includes a first end connected to the third end of the second switching device Q2 and a second end grounded.

The third switching device Q3 has a first end connected to the power supply input IN_2 and a third end connected to the third end of the first switching device Q1 and the third end of the second switching device Q2, And a second stage connected to a second power supply output OUT_2.

Here, the power input terminals IN_1 and IN_2 are connected to the output terminal of the first protection unit 502, preferably, the power input connector 501.

The first power output OUT_1 is a bypass stage and the second power output OUT_2 is an output stage for outputting a DC power from the DC-DC converter 504.

That is, the first power output OUT_1 is connected to the switch 508 and the second power output OUT_2 is connected to the DC-DC converter 504.

Its operation will be described as follows.

First, when a voltage of 2.0 to 3.6 V is applied to the node 'A' in FIG. 12, that is, when a voltage of 2.0 to 3.6 V is input through the power input connector 501, the second switching device Q2 Off state.

At this time, the 'C' node of FIG. 12 is in a low state, so that the first switching device Q1 is turned on, and DC power input through the power input terminal IN_1 is connected to the first power output terminal OUT_1 Output.

When a voltage exceeding 3.6 V is applied to the node 'A', the voltage difference between the 'B' node and the 'A' node in FIG. 12 is 0.7 V or more by the first control diode D1 , The second switching device Q2 is changed from the OFF state to the ON state by the voltage difference generated.

Also, as the second switching element Q2 is changed to the ON state, the 'C' node is changed to the high level, so that the first switching element Q1 is changed from the ON state to the OFF state.

The third switching device Q3 is turned on by the high level of the 'C' node, so that the DC power input to the node A is outputted through the second power output terminal OUT_2.

According to the embodiment of the present invention, the total volume of the electronic price indicator can be reduced by removing the battery included in the electronic price indicator.

In addition, according to the embodiment of the present invention, by supplying driving power of the electronic price indicator through the power supply rail formed in the PROFIEL, not only the battery consumption cost can be reduced, but also the time and manpower required for battery replacement are unnecessary It is possible to lower the product cost by reducing the management cost.

According to the embodiment of the present invention, power supply rails connected to each other are formed in one profile, and a plurality of electronic price indicators are mounted on the formed power supply rails, so that the driving power of a plurality of electronic price indicators can be collectively .

In addition, according to the embodiment of the present invention, the input power is supplied through different paths depending on the type of the input power source, so that both the wall power and the battery power can be used according to the usage environment of the shelf. User satisfaction can be improved.

In addition, according to the embodiment of the present invention, since the power supply device includes the protection circuit that can solve the dangerous situation caused by the input power supply source and the dangerous situation generated by the output power supply, The reliability of the apparatus can be improved.

The features, structures, effects and the like described in the embodiments are included in at least one embodiment and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Accordingly, the contents of such combinations and modifications should be construed as being included in the scope of the embodiments.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. It can be seen that the modification and application of branches are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.

100: Shelf
200: Profile
300: Electronic price indicator
400: Power supply

Claims (17)

A power input connector connected to a power source and receiving a first DC power inputted through the power source;
A power sensing unit sensing a voltage value of a first DC power input through the power input connector and outputting the first DC power to either the first path or the second path according to a voltage value of the sensed DC power, ;
A power output terminal formed in the first path and outputting a first DC power supplied through the power sensing unit to the outside; And
And a DC-DC converting unit formed in the second path for converting the first DC power outputted through the power sensing unit into a second DC power and outputting the converted second DC power to the power output terminal, ,
The power-
And controls the path of the first DC power input through the power input connector according to the type of the power source connected to the power input connector and the input voltage value according to the specification of the power source
Power supply. The method according to claim 1,
The power output terminal
And a power supply rail for supplying driving power to a power terminal of the electronic price indicator, the power supply rail being connected to the profile, and outputting the first DC power or the second DC power to the power supply rail of the profile
Power supply. 3. The method of claim 2,
And the voltage values of the first DC power supply and the second DC power supply output through the power output terminal are equal to each other
Power supply. The method according to claim 1,
The power-
And outputs the first DC power to the first path if the voltage value of the first DC power inputted through the power input connector falls within a preset reference range,
And outputs the first DC power to the second path when the voltage value of the first DC power inputted through the power input connector is out of a preset reference range,
The direct current-to-direct current conversion unit includes:
And a second DC power supply which is disposed on the second path and converts the first DC power supply into a second DC power supply having a voltage value within the reference range
Power supply. 5. The method of claim 4,
The power-
A zener diode including a first end connected to the output terminal of the power input connector and a second end grounded;
A first end connected to the first end of the power input connector, a second end connected to the first power output terminal connected to the power output terminal, and a third end connected to the third end of the second switch and the third end, A first switching element including a third stage,
A first terminal connected to the first end of the power input connector and a first terminal connected to the first terminal of the first switching element, a second terminal connected to the first terminal of the Zener diode, and a third terminal grounded 2 switching element,
A first end connected to an output end of the power input connector, a second end connected to a second power output end connected to the DC direct conversion unit, a third end connected to the third end of the first switching device, Including the third tier associated with the tier
Power supply. 6. The method of claim 5,
The power-
Wherein when the first DC power source having a voltage value within a reference range is applied through the power input connector, the first switching device is turned on and the second and third switching devices are turned off, To be output through the first power output terminal,
Wherein when the first DC power supply having a voltage value exceeding the reference range is applied through the power input connector, the first switching element is turned off and the second and third switching elements are turned on, Is output through the second power output terminal
Power supply. 3. The method of claim 2,
An antenna for receiving information transmitted from outside; And
And a communication module for controlling each component according to the information received through the antenna
Power supply. 8. The method of claim 7,
And a switch disposed between the power sensing unit and the DC-DC converter and the power output terminal,
The communication module includes:
And controls the switch in accordance with a control signal transmitted according to an operation mode of the electronic price indicator
Power supply. 8. The method of claim 7,
A departure detection unit for detecting departure of the profile; And
And a notification unit for generating a notification signal according to the detection of the departure detection unit,
The communication module includes:
Selectively activates the operation of the notification unit according to information received via the antenna,
Wherein,
When the deviation of the profile is detected in the state where the operation is activated,
Power supply. The method according to claim 1,
Wherein the first DC power supply is disposed between the power input connector and the power sensing unit and detects an abnormal state of the first DC power input through the power input connector, Further comprising a first protective portion
Power supply. 9. The method of claim 8,
And a second protection unit disposed between the switch and the power output terminal and for interrupting the first DC power or the second DC power outputted through the switch through temperature sensing
Power supply. 9. The method of claim 8,
And a third protection unit disposed between the switch and the power output terminal for preventing instantaneous current supply to the electronic price indicator
Power supply. And a protrusion protruding toward an inner side of the depressed portion on upper and lower surfaces of the depressed portion;
A first engaging portion extending outwardly from an upper surface of the body, and a second engaging portion extending outwardly from a lower surface of the body, wherein the engaging portion is formed with an insertion groove that is recessed inwardly on an upper surface and a lower surface of the body, A first power supply rail formed on a lower surface of the first coupling portion, and a second power supply rail formed on an upper surface of the second coupling portion;
An electronic price indicator mounted on the profile and including a first power terminal connected to the first power supply rail on an upper surface thereof and a second power terminal connected to the second power supply rail on a lower surface; And
And a power supply mounted to the shelf and electrically connected to the first and second power supply rails of the profile to supply DC power to the first and second power supply rails
Electronic price display device. 14. The method of claim 13,
The power supply device includes:
A power supply source for supplying DC power,
And a power supply unit which receives DC power from the power supply source and selectively supplies the DC power to the first and second power supply rails of the profile,
Electronic price display device. 15. The method of claim 14,
Wherein the power source comprises:
A battery and at least one of an adapter,
The power supply unit includes:
If the power source is an adapter, the DC power is selectively converted according to an input voltage according to the standard of the adapter
Electronic price display device. 14. The method of claim 13,
In the one profile,
A plurality of electronic price indicators are commonly mounted,
Wherein the plurality of electronic price indicators comprise:
The first power supply rails and the second power supply rails being supplied with the same driving power in common
Electronic price display device. 14. The method of claim 13,
The first power supply rail
Positive power supply rail,
Wherein the second power supply rail comprises:
Ground rail in
Electronic price display device.

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