JP2011193933A - Control device, shelf tag terminal, and electronic shelf tag system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic shelf tag system that can keep indication quality with low consumption power without equipping a new device for various temperature environments where a shelf tag terminal is provided.SOLUTION: A control device of the electronic shelf tag system, wherein a shelf tag terminal, which has a display part with memory property, a temperature sensor, and a heater, is connected with the control device, includes: a receiving part for receiving temperature information indicating the temperature of the shelf tag terminal from the shelf label terminal; a memory part that homologizes to memorize the current temperature with the waiting time required to reach an operable temperature area capable of updating and indicating the indication content from the current temperature by heater's heat; a transmission part that transmits data to the shelf tag terminal; and a control part that transmit the image data displayed by the shelf tag terminal to the shelf tag terminal from the transmission part after the waiting time corresponding to the current temperature indicated by the temperature information received from the shelf tag terminal is read from the memory part and passes.

Description

  The present invention relates to a management device that performs temperature control in a shelf label terminal of an electronic shelf label system, a shelf label terminal, and an electronic shelf label system.

In a store, a shelf label terminal for displaying product information is installed for each product on a shelf on which products in the store are displayed. In stores, since goods are frequently moved and replaced, shelf label terminals need to be movably installed. For this reason, most of them are battery-driven.
In addition, since there are many types of products handled in the store, a large number of shelf label terminals are required when installing shelf label terminals for each product.
Generally, a shelf label terminal has a display unit for displaying product information and a communication unit for acquiring product information from an external server or the like. Since these means operate with power from a battery provided inside the shelf label terminal, the shelf label terminal is required to operate with low power consumption.

By the way, the shelf label terminal is also installed in a freezing case for displaying frozen products. When the shelf label terminal is installed in the freezing case, if the temperature of the display means of the shelf label terminal deviates from the operable temperature range of the display means, the display quality is deteriorated and the information on the product to be displayed cannot be displayed normally. There is a problem.
Therefore, in order to maintain the display quality of the display means of the shelf label terminal, the technology of controlling the temperature of the display means itself (see, for example, Patent Document 1) and the temperature of the external atmosphere can be controlled. Some control the temperature to maintain the display quality of the display means (see Patent Documents 2 and 3).

JP 58-106524 A JP 2008-48868 A JP-A-2005-202251

However, the display means and the shelf label terminal described in the patent document need to continue temperature control for a period for maintaining the display quality. When such temperature control is performed using electric power from a built-in battery, it is difficult to operate for a long time as a shelf label terminal.
Therefore, it is conceivable to connect the power supply line to supply power, but it is difficult to install a large number of shelf label terminals in the store in a flexible manner. That is, when changing the layout of the shelf or replacing the product, it is necessary to reconnect the power supply line, which is troublesome. Moreover, since the power supply line which is unnecessary if it is a battery drive will be installed in a shelf, there exists a possibility that the external appearance of a shelf may be impaired.
Further, when controlling the temperature of the external atmosphere of the shelf label terminal, the heated and cooled air diffuses to the surroundings, so that more power is consumed than necessary for the temperature control.

By the way, the vicinity of the product is usually at an optimum temperature for the product. Therefore, if it is attempted to control the temperature of the external atmosphere for the temperature control of the shelf label terminal, it becomes difficult to perform optimal temperature control for the product.
Furthermore, when a temperature control device is installed outside the shelf label terminal, a new device is installed at the commodity display location. For this reason, the appearance of the product display may be impaired, and the volume of the newly installed device and the product may not be displayed.

  The present invention has been made in view of such circumstances, and its purpose is not to newly install a device near the refrigeration case, and in response to various temperature environments in which shelf label terminals are installed, An object is to provide a management device, a shelf label terminal, and an electronic shelf label system that can maintain display quality with low power consumption.

  In order to solve the above-described problems, the present invention is a management device in an electronic shelf label system in which a shelf label terminal having a memory, a temperature sensor, and a heater, and a management device are connected to be communicable. The receiving unit that receives temperature information indicating the temperature of the shelf label terminal from the shelf label terminal, the current temperature, and the heating by the heater causes the display unit to rewrite and display the display content from the current temperature. A storage unit that associates and stores a standby time required to reach an operable temperature range, a transmission unit that transmits data to the shelf label terminal, and temperature information received from the shelf label terminal. Image data to be displayed on the shelf label terminal from the transmission unit to the shelf label terminal after the standby time has elapsed since the standby time corresponding to the current temperature indicated is read from the storage unit And having a control unit for transmitting.

  Further, according to the present invention, in the management device described above, the storage unit stores installation information indicating whether the shelf label terminal requires a standby time or an unnecessary shelf label terminal for each of the shelf label terminals. The control unit reads the installation information from the storage unit, and transmits the image data to the shelf label terminal that does not require a waiting time while waiting for the transmission of the image data to the shelf label terminal that requires a waiting time. It transmits to a part.

  The present invention is also a shelf label terminal in an electronic shelf label system in which a shelf label terminal and a management device are communicably connected, a temperature sensor for measuring the temperature of the shelf label terminal, a heater, and the management device A transmitting unit for transmitting data to the receiving unit, a receiving unit for receiving data from the management device, a display unit for displaying image data and having a memory property, and a transmission request for the temperature of the shelf label terminal from the management device In this case, the measurement result of the temperature sensor is transmitted from the transmission unit to the management device, the heater is turned on, and when the image data is received from the management device after receiving the transmission request, the display And a control unit that displays image data on the unit and controls the heater to be turned off.

  Further, the present invention is a management device in an electronic shelf label system in which a shelf label terminal having a memory property, a temperature sensor and a heater, and a management device are communicably connected, and the shelf label terminal However, due to the heating by the heater, a receiving unit that receives from the shelf label terminal a waiting time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the present time, and A transmission unit that transmits data to the shelf label terminal; and after the standby time has elapsed since the reception of the standby time, image data to be displayed on the shelf label terminal is transmitted from the transmission unit to the shelf label terminal. And a control unit.

  The present invention is also a shelf label terminal in an electronic shelf label system in which the shelf label terminal and the management device are communicably connected, a temperature sensor that measures the temperature of the shelf label terminal, a heater, a current temperature, A storage unit that stores a waiting time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the current temperature by heating with the heater, and the management A transmission unit that transmits data to the device, a reception unit that receives data from the management device, a display unit that displays image data, and has a memory property, and a transmission request for waiting time of the shelf label terminal from the management device Is received from the storage unit, the standby time corresponding to the current temperature measured by the temperature sensor, the transmission unit to transmit the standby time to the management device, A control unit that controls the heater to turn off the heater when the image data is received from the management device after receiving the transmission request. Features.

  The present invention is also a shelf label terminal in an electronic shelf label system in which the shelf label terminal and the management device are communicably connected, a temperature sensor that measures the temperature of the shelf label terminal, a heater, a current temperature, A storage unit that stores a waiting time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the current temperature by heating with the heater, and the management A transmission unit that transmits data to a device, a reception unit that receives image data from the management device, a display unit that displays image data and has a memory property, and the image data received from the management device, The standby time corresponding to the current temperature measured by the temperature sensor is read from the storage unit, the heater is turned on, and the standby time has elapsed since the standby time was read. After the, the image data to display on the display unit, and having a control unit for controlling turning off the heater.

  Further, the present invention is a management device in an electronic shelf label system in which a shelf label terminal having a memory property, a temperature sensor and a heater, and a management device are communicably connected, and the shelf label terminal A transmission unit that transmits image data to be displayed to the shelf label terminal, and the shelf label terminal is within an operable temperature range in which the display unit can rewrite and display the display content from the present by heating by the heater. A receiving unit that receives the waiting time required to reach the shelf label terminal after transmission of the image data, and after the waiting time has elapsed since the reception of the waiting time, the transmitting unit to the shelf label terminal A control unit that transmits a display confirmation command that causes the management device to transmit a display result indicating whether or not the image data is normally displayed on the display unit of the shelf label terminal. And wherein the door.

  The present invention is also a shelf label terminal in an electronic shelf label system in which the shelf label terminal and the management device are communicably connected, a temperature sensor that measures the temperature of the shelf label terminal, a heater, a current temperature, A storage unit that stores a waiting time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the current temperature by heating with the heater, and the management A transmission unit that transmits data to a device, a reception unit that receives image data from the management device, a display unit that displays the image data and has a memory property, and the image data received from the management device, The standby time corresponding to the current temperature measured by the temperature sensor is read from the storage unit, the standby time read from the transmission unit to the management device is transmitted, and the heater When the standby time has elapsed since the standby time has been read, the image data is displayed on the display unit, the heater is controlled to be turned off, and a display confirmation command is received from the management device And a control unit that transmits a response signal including a display result indicating whether or not the display unit has displayed the image data normally from the transmission unit to the management device.

  The present invention is also an electronic shelf label system in which a shelf label terminal and a management device are communicably connected, and the management device transmits image data to be displayed on the shelf label terminal to the shelf label terminal. The waiting time required for the first transmission unit and the shelf label terminal to reach an operable temperature range in which the display unit can rewrite and display the display content from the present by heating by the heater, The first receiving unit that receives from the shelf label terminal after the transmission of the image data and the image data from the first transmission unit to the shelf label terminal after the standby time received from the shelf label terminal has elapsed. And a first control unit that transmits a display confirmation command for transmitting to the management device a display result indicating whether or not the shelf label terminal has been normally displayed on the display unit of the shelf label terminal. Measure the temperature of the bill terminal A storage unit that stores temperature control information in which a temperature sensor, a heater, a current temperature, and the standby time are associated, a second transmission unit that transmits data to the management device, and an image from the management device A second receiving unit for receiving data, a display unit for displaying image data and having a memory function, and a standby corresponding to the current temperature measured by the temperature sensor when the image data is received from the management device Read the time from the storage unit, transmit the read standby time from the transmission unit to the management device, control the heater to be on, and after the standby time has elapsed since the standby time has elapsed, the display unit Display the image data, control the heater off, and when receiving a display confirmation command from the management device, from the transmission unit to the management device, Radical 113 is characterized by having a second control unit for transmitting a response signal including a display result indicating whether displayed normally the image data.

  In addition, the present invention is capable of communication between a temperature sensor, a heater, a shelf label terminal having a display unit having a memory property, and a management device having a storage unit for storing image data to be displayed on the shelf label terminal. An electronic shelf label system connected to the temperature control command transmitting means for transmitting a temperature adjustment command including an instruction to transmit temperature information of the shelf label terminal to the shelf label terminal, and the temperature Image data transmission means for transmitting the image data in the storage unit to the shelf label terminal after a predetermined waiting time based on the temperature information of the shelf label terminal included in the response to the adjustment command, The shelf label terminal receives the image data and displays the image data display means for displaying on the display unit, the temperature adjustment command, and the shelf label as a measurement result by the temperature sensor. Temperature information transmitting means for transmitting temperature information at the end to the management device, and controlling the heater to be turned on upon receipt of the temperature adjustment command, and after the image data display means has displayed the image data, Temperature control means for controlling to turn off, and the standby time is displayed by the display unit rewriting the display content from the current temperature by controlling the heater to be turned on by the shelf label terminal. The shelf label terminal or the management device has a temperature adjustment table in which the current temperature and the standby time are associated with each other, and The image data transmission means acquires the waiting time based on the temperature adjustment table from the shelf label terminal or the management device, and stores the image data Characterized by waiting a signal.

  In the electronic shelf label system according to the present invention, the temperature adjustment command further includes the image data, and the image data transmission unit is included in the temperature adjustment command and is transmitted first. An image data display instruction is transmitted.

  In addition, the present invention includes a shelf label terminal having a temperature sensor, a heater, and a display unit having a memory property, and a management device having a first storage unit that stores image data to be displayed on the shelf label terminal. An electronic shelf label system connected communicably, wherein the management device has a temperature adjustment command transmission means for transmitting a temperature adjustment command including the image data to the shelf label terminal, and the shelf label terminal Is a waiting time required for the shelf label terminal to reach an operable temperature range in which the display unit can rewrite and display the display content from the current temperature after the heater is turned on, or A second storage unit that stores, as a rewritable condition, a rewritable temperature at which the display unit can rewrite and display the display content; and after the heater is turned on, the shelf A rewritable condition confirmation unit that determines whether or not the terminal satisfies the rewritable condition, and receives the temperature adjustment command and controls the heater to be turned on, and the rewritable condition confirmation unit performs the rewritable condition. Adjusting the heater to be turned off when it is determined that the image data is satisfied, and image data for displaying the image data on the display unit when the rewritable condition confirmation unit determines that the rewritable condition is satisfied. And display means.

As described above, according to the present invention, the display unit of the shelf label terminal requires power supply only at the time of rewriting the display content, and after rewriting the display content, power supply is necessary to maintain the display content. By using display means having memory characteristics, the temperature control of the shelf label terminal is performed only at the time of rewriting the display contents of the display unit.
Specifically, the current temperature of the shelf label terminal is measured, and from the measured temperature, a standby time (the shelf label terminal operates its own heater using the table prepared in advance, and the display unit displays the contents The time required to reach a temperature (operational temperature range) that can be rewritten. The heater of the shelf label terminal is controlled to be turned on only during this waiting time, and after the waiting time has elapsed, the image data is displayed on the display unit, and the heater is turned off.
Thereby, it is not necessary to always turn on the heater of the shelf label terminal, and the heater may be operated only for the minimum necessary time. Therefore, display quality can be maintained while realizing low power consumption of the shelf label terminal.
Moreover, even a shelf label terminal installed in a low temperature environment can realize low power consumption, and therefore the shelf label terminal can be driven by a battery regardless of whether or not temperature control is performed. Therefore, it is not necessary to newly provide a special device or power supply line near the refrigeration case.

It is the block diagram which showed the structure of the electronic shelf label system of this embodiment. 2 is a functional block diagram showing a configuration of a shelf label terminal 10. FIG. 2 is a functional block diagram showing a configuration of an ESL server 20. FIG. 4 is a diagram illustrating an example of a temperature control table stored in a storage device 24. FIG. It is a flowchart explaining operation | movement of the electronic shelf label system in 1st Embodiment. It is a flowchart explaining operation | movement of the electronic shelf label system in 2nd Embodiment. 4 is a diagram illustrating an example of a temperature control table stored in a storage unit 13. FIG. It is a flowchart explaining operation | movement of the electronic shelf label system in 3rd Embodiment. It is a flowchart explaining operation | movement of the electronic shelf label system in 4th Embodiment. It is a flowchart explaining operation | movement of the electronic shelf label system in 5th Embodiment.

  Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the electronic shelf label system of this embodiment. In the illustrated example, the electronic shelf label system is installed in a store that sells products, and includes a shelf label terminal 10, an ESL (Electronic Shelf Label) server 20 (management device), a wireless device, and the like. A repeater 30 is provided. Here, a plurality of shelf label terminals 10 are installed in the store. As an example, shelf label terminals 10-1 and 10-2 are illustrated. A plurality of wireless repeaters 30 are also installed in the store. As an example, wireless repeaters 30-1 and 30-2 are illustrated. The ESL server 20 and each wireless relay device 30 are connected via a network 40. Each shelf label terminal 10 and each wireless repeater 30 perform wireless communication using, for example, a short-range wireless system (for example, IEEE 802.15.4). Each shelf label terminal 10 communicates with the ESL server 20 via the wireless relay device 30 by performing wireless communication with the wireless relay device 30.

FIG. 2 is a functional block diagram showing the configuration of the shelf label terminal 10.
The shelf label terminal 10 includes a control unit 11, a display unit 12, a storage unit 13, a wireless communication unit 14, a temperature sensor 15, and a heater 16.
The control unit 11 controls each unit in the shelf label terminal 10.
The display unit 12 is, for example, a liquid crystal display device including a liquid crystal element having a memory property, and displays product information related to the product such as the name and price of the product. Here, the liquid crystal element having a memory property requires power only when displaying image data (when writing display contents), and once the image data is displayed, it is not necessary to supply power. This is a liquid crystal element having the characteristic of maintaining the display state. Therefore, adopting a liquid crystal display device using such a liquid crystal element for the shelf label terminal 10 is an effective means for reducing power consumption.
The storage unit 13 includes a ROM (Read-Only-Memory), a RAM (Random-Access Memory), and the like, and temporarily stores data used by each unit of the shelf label terminal 10 during the processing.
The wireless communication unit 14 transmits and receives data to and from the ESL server 20 by communicating with the wireless relay device 30.
The temperature sensor 15 detects the temperature of the shelf label terminal 10.
The heater 16 is turned ON / OFF based on an instruction from the control unit 11, generates heat during the ON time, and applies heat to the shelf label terminal 10.

FIG. 3 is a schematic block diagram showing the configuration of the ESL server 20.
The ESL server 20 includes a control unit 21, a wired communication unit 22, a memory 23, and a storage device 24.
The control unit 21 controls each unit included in the ESL server 20.
The wired communication unit 22 communicates with each shelf label terminal 10 by communicating with each wireless relay device 30 via the network 40.
The memory 23 temporarily stores data used by each unit of the ESL server 20 during the processing.
The storage device 24 stores product information, shelf label terminal information, and a temperature control table to be described later. This product information is information including image data for displaying the name, price, etc. of the product on the display unit 12 of the shelf label terminal 10 and product identification information for identifying the product. The shelf label terminal information includes shelf label terminal identification information for individually identifying the shelf label terminal 10, size information of the shelf label terminal of the shelf label terminal 10, and shelf identification information for identifying the shelf on which the shelf label terminal 10 is arranged. And product identification information associated with each other. The temperature control table will be described later.

  In the embodiment described below, when the information displayed on the display unit 12 by the shelf label terminal 10 is rewritten, the temperature of the shelf label terminal 10 is within the operable temperature range (the process of rewriting the image data displayed on the display unit 12). The heater 16 in the shelf label terminal 10 is controlled to be turned ON or OFF so that the temperature reaches a temperature at which the temperature can be changed.

(1) First Embodiment In the first embodiment, the ESL server 20 considers the time until the temperature of the shelf label terminal 10 falls within the operable temperature range, and image data is sent to the shelf label terminal 10. Will be described.
FIG. 4 is a diagram illustrating an example of a temperature control table stored in the storage device 24 of the ESL server 20 according to the first embodiment. This is a table for the shelf label terminal 10 whose operable temperature range is 5 ° C. or higher.
In the temperature control table, the current temperature, the standby time, the correction value (L), and the correction value (S) are stored in association with each other.
The current temperature is a temperature measured by the temperature sensor 15 of the shelf label terminal 10.
The standby time is the time required for the display unit 12 to reach an operable temperature range in which display content can be rewritten by heating by the heater.

The correction value (L) and the correction value (S) indicate values for correcting the standby time according to the size and characteristics of the shelf label terminal 10. When the size of the shelf label terminal 10 is larger than the standard size, the correction value (L) is used, and when the size of the shelf label terminal 10 is smaller than the standard size, the correction value (S) is used.
In general, as the size of the shelf label terminal 10 increases, the time required to heat the entire shelf label terminal 10 with the heater 16 and bring the shelf label terminal 10 to the operable temperature range becomes longer. Therefore, the correction value (L) is a value for making the standby time longer than the standby time in the standard-sized shelf label terminal 10. The correction value (S) is the opposite, and is a value for shortening the standby time compared to the standby time in the standard-sized shelf label terminal 10.

Next, the operation of the electronic shelf label system in the first embodiment will be described. Here, a case where the shelf label terminal 10 is a standard size will be described.
FIG. 5 is a flowchart for explaining the operation of the electronic shelf label system in the first embodiment.
The control unit 21 of the ESL server 20 starts accepting an image transmission request from the external system (step S100). This external system is, for example, an in-store server provided outside the ESL server 20. Further, the ESL server 20 may start the following processing by batch processing.
When there is an image transmission request from the external system, the ESL server 20 transmits a temperature adjustment command to the shelf label terminal 10 by the wired communication unit 22 (step S101). This temperature adjustment command is a command for measuring the temperature in the shelf label terminal 10 and transmitting the measurement result to the ESL server 20. When receiving the temperature adjustment command from the ESL server 20, the control unit 11 of the shelf label terminal 10 measures the temperature in the shelf label terminal 10 by the temperature sensor 15 (step S103), and individually determines the measurement result and the shelf label terminal 10. A response signal including the terminal identification information to be identified is transmitted to the ESL server 20 via the wireless communication unit 14 (step S104). Further, the control unit 11 of the shelf label terminal 10 turns on the heater 16 (step S105).

When receiving the response signal from the shelf label terminal 10, the control unit 21 of the ESL server 20 obtains the current temperature of the shelf label terminal 10 by extracting the measurement result included in the received response signal, and stores the temperature control table. Reference is made (step S106), and the standby time corresponding to the current temperature is read out. In addition, referring to the shelf label terminal information stored in the storage device 24, if the size information of the shelf label terminal 10 is not the standard size, the correction value corresponding to the size is also read and corrected using the correction value. Calculate the waiting time. Then, the control unit 21 of the ESL server 20 performs counting based on the clock provided therein and waits until the read standby time elapses (step S107).
When the control unit 21 of the ESL server 20 detects that the standby time has elapsed, the control unit 21 reads out the product information corresponding to the shelf label terminal identification information included in the response signal from the storage device 24, and stores the image data in the product information as The aforementioned shelf label terminal identification information is transmitted as a destination (step S108).

  Since the shelf label terminal 10 receives the image data from the ESL server 20 after the standby time has elapsed, the shelf label terminal 10 can be operated by the heater 16 when the shelf label terminal 10 receives the image data. The temperature is within the temperature range. Therefore, when receiving the image data from the ESL server 20, the control unit 11 of the shelf label terminal 10 displays the received image data on the display unit 12 (step S109), turns off the heater 16 (step S110), and the image data. Is transmitted to the ESL server 20 by the wireless communication unit 14 (step S111). The control unit 21 of the ESL server 20 receives this response signal.

According to this embodiment, under the management of the ESL server 20, temperature control is performed for the minimum necessary time so that the shelf label terminal 10 can perform a display content rewriting process normally. I did it. As a result, it is possible to realize display content rewriting processing with low power consumption in accordance with the time at which display content is to be rewritten.
In addition, according to this embodiment, since the timing at which the ESL server 20 transmits the temperature adjustment command is determined and the standby time is managed by the ESL server 20, the degree of communication congestion can be averaged, Communication efficiency can be improved.

  In the above-described embodiment, the control unit 21 of the ESL server 20 transmits the image data in step S108. However, the control unit 21 transmits the image data when transmitting the temperature adjustment command. In step S108, the image data is transmitted. An instruction to be displayed may be transmitted.

  In the above-described embodiment, the example in which the correction value (L) and the correction value (S) are stored in the temperature control table according to the size of the shelf label terminal 10 has been described. The correction value may be stored according to the installation location. For example, how to cool the shelf label terminal 10 differs depending on the position in the refrigeration case (a position where the cold wind directly hits or a position where the wind does not hit directly), and the time required to reach the operable temperature range depends on the position. Correction values that are longer (when the cool air is directly applied) or shorter (when the cool air is not directly applied) may be stored in the temperature control table.

(2) Second Embodiment In the second embodiment, there are a shelf label terminal 10 installed on a shelf at a normal temperature and a shelf label terminal 10 installed on a shelf in a low temperature region such as a freezing case. The case will be described.
Here, the storage unit 24 of the ESL server 20 further includes low-temperature installation information indicating whether the shelf label terminal identification information of the shelf label terminal information is a shelf label terminal that requires standby time or an unnecessary shelf label terminal. Remember. A terminal requiring a waiting time is a shelf label terminal installed on a shelf in a low temperature area, and a terminal requiring no waiting time is a shelf label terminal installed on a shelf in a room temperature area. Since the other functions are basically the same as those of the first embodiment for the shelf label terminal 10 and the ESL server 20, the description of the same functions will be omitted, and the differences will be described below.

Next, the operation of the electronic shelf label system in the second embodiment will be described.
FIG. 6 is a flowchart for explaining the operation of the electronic shelf label system according to the second embodiment.
The control unit 21 of the ESL server 20 starts accepting an image transmission request from the external system (step S200), and transmits a temperature adjustment command to the shelf label terminal 10 by the wired communication unit 22 (step S201). Here, the low temperature installation information stored in the storage device 24 is referred to, and the shelf label terminal identification information of the shelf label terminal 10 associated with the low temperature installation information indicating that the standby time is required is read out. A temperature adjustment command is transmitted with the terminal identification information as the destination.

  When receiving the temperature adjustment command from the ESL server 20, the control unit 11 of the shelf label terminal 10 measures the temperature in the shelf label terminal 10 by the temperature sensor 15 (step S203), and includes the measurement result and its own terminal identification information. A response signal is transmitted to the ESL server 20 via the wireless communication unit 14 (step S204), and the heater 16 is turned on (step S205).

When receiving the response signal from the shelf label terminal 10, the control unit 21 of the ESL server 20 obtains the current temperature of the shelf label terminal 10 by extracting the measurement result included in the received response signal, and stores the temperature control table. Reference is made (step S206), and the standby time corresponding to the current temperature is read out. Further, referring to the size information of the shelf label terminal, if the size of the shelf label terminal 10 is not standard, a correction value corresponding to the size is also read. Then, the control unit 21 of the ESL server 20 performs counting based on a clock provided therein.
Next, the control unit 21 of the ESL server 20 reads the shelf label terminal identification information associated with the low-temperature installation information indicating that the terminal does not require the standby time, sets the shelf label terminal identification information as a destination, Data is transmitted (step S207). Here, image data corresponding to each shelf label terminal identification information is read and transmitted. When the transmission of the image data ends, the control unit 21 of the ESL server 20 refers to the count value, determines whether or not the standby time has elapsed, and waits until the standby time elapses (step S208).

  On the other hand, the control unit 11 of the shelf label terminal 10 that has received the image data displays the received image data on the display unit 12, and transmits a response signal indicating the display result to the ESL server 20 by the wireless communication unit 14 (step S210). ).

  When the control unit 21 of the ESL server 20 detects that the standby time has elapsed after receiving the response signal transmitted from the shelf label terminal 10, the control unit 21 includes the shelf label terminal identification information included in the response signal received in step S204. Corresponding product information is read from the storage device 24, and the image data in the product information is transmitted with the aforementioned shelf label terminal identification information as the destination (step S211).

  When the shelf label terminal 10 receiving the image data has received the image data from the ESL server 20 after the standby time has elapsed, the shelf label terminal 10 under the low temperature with the heater 16 turned on receives the image data. The shelf label terminal 10 has a temperature in the operable temperature range by the heater 16. Accordingly, when receiving the image data from the ESL server 20, the control unit 11 of the shelf label terminal 10 displays the received image data on the display unit 12 (step S212), turns off the heater 16 (step S213), and the image data The response signal including the display result is transmitted to the ESL server 20 by the wireless communication unit 14 (step S214). The control unit 21 of the ESL server 20 receives this response signal.

  According to this embodiment, image data is transmitted to the shelf label terminal 10 installed at room temperature until the standby time of the shelf label terminal 10 installed at a low temperature elapses, and the standby time has elapsed. Thereafter, the image data is transmitted to the shelf label terminal 10 installed at a low temperature. As a result, the image data is transmitted to the next shelf label terminal 10 after the transmission of the image data to the certain shelf label terminal 10 is completed for the shelf label terminal 10 installed at normal temperature and the shelf label terminal 10 installed at low temperature. Compared with the case of the continuous transmission method in which the image data is transmitted, the total time required to complete the transmission of the image data to all the shelf label terminals 10 can be shortened. For example, depending on the number of the shelf label terminals 10 installed, all the shelf label terminals 10 may be connected to the shelf label terminals 10 within the time until the standby time of the shelf label terminal 10 having the longest standby time elapses. It is also possible to complete the transmission of the image data.

An example will be described in which 1000 shelf label terminals 10 are installed at room temperature and 20 shelf label terminals 10 are installed cold. The ESL server 20 transmits image data to the 100 shelf label terminals 10 and rewrites the display content of the display unit 12 based on the image data received by the 100 shelf label terminals 10 for one minute (per unit 0.01 minutes), and it is assumed that the waiting time of the shelf label terminal 10 installed at low temperature is 10 minutes. In this case, image data is transmitted to 1000 shelf label terminals 10 installed at room temperature, and the shelf label terminal 10 rewrites the display contents for 10 minutes (A), and 20 shelf label terminals 10 installed at low temperature. After warming up for the waiting time, it takes 10 minutes + 0.01 × 20 = 10 minutes (B) for the ESL server 20 to transmit the image data and the shelf label terminal 10 rewrites the display contents. .
Therefore, when all the display contents of the 1000 shelf label terminals 10 installed at room temperature are rewritten and then the 20 shelf label terminals 10 installed at a low temperature are heated to rewrite the display contents, (A) + (B ) = A little over 20 minutes are required.
On the other hand, when 20 shelf label terminals 10 installed at a low temperature are heated, image data is transmitted to 1000 shelf label terminals 10 installed at room temperature, and the shelf label terminal 10 rewrites display contents. , (B) 10 minutes of (A) can be carried out and finished, and as a result, the display contents of all shelf label terminals 10 can be rewritten in just over 10 minutes of (B). Can be completed. In this way, by selecting the number of shelf label terminals 10 installed at room temperature and shelf label terminals 10 installed at low temperature, the display contents can be rewritten very efficiently.

  In the above-described embodiment, an example has been described in which whether or not a shelf label terminal that is installed at a low temperature and requires a standby time is distinguished based on the low temperature installation information. However, each terminal has unique shelf label terminal identification information. By separating the serial number range as shelf label terminal identification information between low temperature installation and normal temperature installation, it is possible to grasp the shelf label terminal installed at low temperature according to the serial number value. Good.

(3) Third Embodiment In the third embodiment, a case where a temperature control table is provided in the shelf label terminal 10 and a standby time is designated from the shelf label terminal 10 to the ESL server 20 will be described. Here, since the shelf label terminal 10 and the ESL server 20 are basically the same as those in the first embodiment, the description of the same functions will be omitted, and the differences will be described below.

  FIG. 7 is a diagram illustrating an example of a temperature control table stored in the storage unit 13 of the shelf label terminal 10 according to the third embodiment. In the temperature control table, the current temperature and the standby time are associated with each other. The waiting time represents the time until the shelf label terminal 10 reaches the operable temperature range by heating with the heater 16. This temperature control table is data when the shelf label terminal 10 is within the operable temperature range when the shelf label terminal 10 is 5 ° C. or higher.

Next, the operation of the electronic shelf label system in the third embodiment will be described.
FIG. 8 is a flowchart for explaining the operation of the electronic shelf label system according to the third embodiment.
The control unit 21 of the ESL server 20 starts accepting an image transmission request from the external system (step S300), and transmits a temperature adjustment command to the shelf label terminal 10 by the wired communication unit 22 (step S301). When receiving the temperature adjustment command from the ESL server 20, the control unit 11 of the shelf label terminal 10 measures the temperature in the shelf label terminal 10 using the temperature sensor 15, and refers to the temperature control table in the storage unit 13 (step S303). . Then, the control unit 11 of the shelf label terminal 10 reads the standby time associated with the current temperature using the measured temperature as the current temperature, and sends a response signal including the standby time and its own shelf label terminal identification information. It transmits to the ESL server 20 via the wireless communication part 14 (step S304). Further, the control unit 11 of the shelf label terminal 10 turns on the heater 16 (step S305).

  When receiving the response signal from the shelf label terminal 10, the control unit 21 of the ESL server 20 reads the standby time included in the received response signal, performs a count based on the clock provided therein, and reads the standby It waits until time passes (step S306). When the control unit 21 of the ESL server 20 detects that the standby time has elapsed, the control unit 21 reads out product information corresponding to the shelf label terminal identification information included in the response signal from the storage device 24, and stores the image data in the product information. Then, the above-described shelf label terminal identification information is transmitted as a destination (step S307).

  Since the shelf label terminal 10 receives the image data from the ESL server 20 after the standby time has elapsed, when the shelf label terminal 10 receives the image data, the shelf label terminal 10 The temperature is within the operable temperature range. Therefore, when receiving the image data from the ESL server 20, the control unit 11 of the shelf label terminal 10 displays the received image data on the display unit 12 (Step S308), turns off the heater 16 (Step S309), and the image data. Is transmitted to the ESL server 20 by the wireless communication unit 14 (step S310). The control unit 21 of the ESL server 20 receives this response signal.

  According to this embodiment, since the temperature control table corresponding to its own characteristic is stored for each shelf label terminal 10, the standby time according to the individual characteristics of the shelf label terminal 10 can be used. Thereby, the variation in the operable temperature range derived from the hardware of the shelf label terminal 10 can be absorbed. For example, it is possible to absorb variations in temperature characteristics of the heater 16 and variations in heat retention of the housing.

  In the above-described embodiment, the control unit 21 of the ESL server 20 transmits the image data in step S307. However, the image data is also transmitted when the temperature adjustment command is transmitted, and in step S307, the image data is transmitted. An instruction to display image data may be transmitted.

(4) Fourth Embodiment In the fourth embodiment, a case will be described in which a temperature control table is provided in the shelf label terminal 10 and the shelf label terminal 10 itself waits until the standby time elapses. Here, since the shelf label terminal 10 and the ESL server 20 are basically the same as those in the first embodiment, the description of the same functions will be omitted, and the differences will be described below.

In this embodiment, the shelf label terminal 10 stores the temperature control table shown in FIG.
FIG. 9 is a flowchart for explaining the operation of the electronic shelf label system according to the fourth embodiment.
The control unit 21 of the ESL server 20 starts accepting an image transmission request from an external system (step S400), and transmits image data corresponding to each shelf label terminal 10 to each shelf label terminal 10 (step S401). . When receiving the image data from the ESL server 20 (step S402), the control unit 11 of the shelf label terminal 10 transmits a response signal indicating that the image data has been successfully received to the ESL server 20 via the wireless communication unit 14. (Step S403).
Next, the control part 11 of the shelf label terminal 10 measures the temperature in the shelf label terminal 10 with the temperature sensor 15, and turns ON the heater 16 (step S404). Then, the control unit 11 of the shelf label terminal 10 refers to the temperature control table of the storage unit 13, reads the standby time associated with the current temperature, using the measured temperature as the current temperature, and provides it within itself. Counting is performed based on the received clock, and the process waits until the read standby time elapses (step S405).

  The shelf label terminal 10 has a temperature in the operable temperature range by the heater 16 after the standby time has elapsed. Therefore, when the control unit 11 of the shelf label terminal 10 detects that the standby time has elapsed, the image data received in step S402 is displayed on the display unit 12 (step S406), and the heater 16 is turned off (step S407). Then, a response signal of a display result indicating that the display of the image data is normally completed is transmitted to the ESL server 20 by the wireless communication unit 14 (step S408). The control unit 21 of the ESL server 20 receives this response signal.

According to this embodiment, the ESL server 20 can know the display result immediately after the image data is displayed on the shelf label terminal 10. Further, even if there is a variation in waiting time for each shelf label terminal 10, the control software of the ESL server 20 is not affected.
Further, since it is only necessary to provide a new function on the shelf label terminal 10, the existing control software can be used as it is for the ESL server 20.

  In this embodiment, the response signal indicating the display result of step S408 may be transmitted immediately after the display is performed, or is performed between the ESL server 20 and the shelf label terminal 10. You may make it carry out at the time of transmission / reception of the synchronizing signal for every fixed time.

  In the fourth embodiment, the standby time is read by referring to the temperature control table, and the standby until the standby time elapses has been described. However, a temperature control table is provided in the shelf label terminal 10. It may not be possible. That is, the shelf label terminal 10 stores “rewrite processing temperature”, which is a temperature at which image data displayed on the display unit 12 can be rewritten, in the storage unit 13. And the control part 11 of the shelf label terminal 10 measures temperature with the temperature sensor 15 at a fixed interval (for example, every second), compares this measured temperature with the rewriting processing temperature, and the measured temperature is When it is determined that the temperature is equal to or higher than the rewrite processing temperature, image data is displayed and the heater 16 is turned off.

  In this case, since the rewrite processing temperature is stored in advance in the storage unit 13 of the shelf label terminal 10, the information stored in the storage unit 13 can be reduced as compared with the case where the temperature control table is provided. it can. Moreover, even if the installation status such as whether or not the cold wind from the freezing case directly hits the shelf label terminal 10 is not known in advance, or even without correcting the standby time according to how the cold wind hits, When the rewrite processing temperature is reached, the image data rewrite process can be performed.

(5) Fifth Embodiment In the fifth embodiment, a case where a response signal representing a display result is transmitted in response to a request from the ESL server 20 in the fourth embodiment will be described. Here, since the shelf label terminal 10 and the ESL server 20 are basically the same as those in the fourth embodiment, the description of the same functions will be omitted, and the differences will be described below.
FIG. 10 is a flowchart for explaining the operation of the electronic shelf label system according to the fifth embodiment.
The control unit 21 of the ESL server 20 starts accepting an image transmission request from an external system (step S500), and transmits image data corresponding to each shelf label terminal 10 to each shelf label terminal 10 (step S501). . When the control unit 11 of the shelf label terminal 10 receives the image data from the ESL server 20 (Step S502), the temperature sensor 15 measures the temperature in the shelf label terminal 10 and turns on the heater 16 (Step S503). Then, the control unit 11 of the shelf label terminal 10 refers to the temperature control table of the storage unit 13, reads the standby time associated with the current temperature, using the measured temperature as the current temperature, and provides it within itself. Counting is performed based on the received clock and waits until the read standby time elapses (step S504). Then, the control unit 11 of the shelf label terminal 10 transmits a response signal including the standby time to the ESL server 20 via the wireless communication unit 14. Here, the measurement result (measured temperature) may also be included in the response signal.
The shelf label terminal 10 has a temperature in the operable temperature range by the heater 16 after the standby time has elapsed. Therefore, when detecting that the standby time has elapsed, the control unit 11 of the shelf label terminal 10 displays the image data received in step S502 on the display unit 12 (step S507), and turns off the heater 16 (step S508). ).

On the other hand, when receiving the response signal transmitted from the shelf label terminal 10 (step S509), the control unit 21 of the ESL server 20 extracts the waiting time included in the response signal and based on the clock provided in itself. And waits until the extracted waiting time elapses (step S510). When the standby time has elapsed, the control unit 21 of the ESL server 20 transmits a display confirmation command to the shelf label terminal 10 (step S511).
When receiving the display confirmation command from the ESL server 20, the control unit 11 of the shelf label terminal 10 generates a response signal including the display result and transmits the response signal to the ESL server 20 (step S512). The control unit 21 of the ESL server 20 receives this response signal.

  According to this embodiment, since the ESL server 20 is always the main station, the shelf label terminal 10 only needs to perform an operation or return a response when requested by the ESL server 20. This can simplify the specification.

  In the fifth embodiment, the shelf label terminal 10 reads the standby time with reference to the temperature control table and waits until the standby time elapses. The temperature control table may not be provided. That is, there is a possibility that the shelf label terminal 10 has surely completed the rewrite processing temperature, which is the temperature at which the image data displayed on the display unit 12 can be rewritten, and the image data rewrite processing. The rewritable predicted time (for example, 600 seconds) is stored. When the control unit 11 of the shelf label terminal 10 receives the image data from the ESL server 20, the control unit 11 measures the temperature with a temperature sensor 15 at a certain interval (for example, every second), and the measured temperature and the rewrite processing temperature. And the rewritable predicted time is transmitted to the ESL server 20. When the control unit 11 of the shelf label terminal 10 determines that the measured temperature is equal to or higher than the rewrite processing temperature, the control unit 11 displays the image data and turns off the heater 16.

  In this case, when the rewrite processing temperature is reached, the image data is displayed and the heater 16 is turned off. Therefore, it is possible to deal with the case where the cold air in the refrigeration case hits or the temperature environment varies greatly. Thus, display of image data and reduction in power consumption can be achieved. For example, when the door of the refrigeration case is opened by a customer who visits the store, the temperature in the refrigeration case rises, and the temperature of the shelf label terminal 10 rises accordingly, and the rewrite processing temperature is reached quickly, When the arrangement of the product in the freezer case is changed and the cold air is not directly applied and the time for heating by the heater 16 is shortened and the rewriting temperature is reached quickly, the rewriting process is immediately performed and the heater 16 is turned off. Can do.

  In the first to fifth embodiments described above, the case where a response signal indicating normality is transmitted as the response signal of the display result has been described. However, an error has occurred other than when the response signal is normal. It is also possible to send a response indicating that it has occurred. For example, the image data received from the ESL server 20 is corrupted when the operable temperature range is not reached for some reason and the display cannot be performed normally, or when the battery voltage is lower than the reference value. A response signal indicating an error such as a case can be transmitted.

In the first to third embodiments described above, the ESL server 20 transmits image data to the shelf label terminal 10 to display the image data, and then transmits image data to be displayed next. Temporarily stored in the storage unit 13 of the bill terminal 10. Then, the temperature of the shelf label terminal 10 is acquired from the shelf label terminal 10 before the timing of displaying the temporarily stored image data (for example, before the maximum standby time required for temperature control), and the acquired temperature Referring to the temperature table based on the above, the timing for transmitting the temperature adjustment command to the shelf label terminal 10 is determined. Specifically, the transmission timing of the temperature adjustment command is determined so that the time when the temperature of the shelf label terminal 10 becomes an appropriate temperature for rewriting the display contents is almost the same time as the display timing of the image data.
When it is detected that the transmission time is reached, a temperature adjustment command is transmitted (steps S101, S201, S301), and when the temperature control of the shelf label terminal 10 is performed, the shelf is almost simultaneously with the timing of displaying the image data. The bill terminal 10 has a temperature suitable for rewriting display contents, that is, an operable range temperature.
When the timing for actually displaying the image data is reached, a redisplay command (display contents are temporarily stored from the ESL server 20 instead of transmitting the image data (steps S108, S207, S211, and S307). Command for instructing to rewrite the image data), and the shelf label terminal 10 that has received the redisplay command reads out the image data temporarily stored in the storage unit 13 and causes the display unit 12 to display the image data. Good.
Thereby, for example, the display contents of the plurality of shelf label terminals 10 can be updated all at once by transmitting a redisplay command at a certain time. For example, it is effective when the display content is changed at the same timing at a fixed time such as a time sale.

In the first to fifth embodiments described above, since a liquid crystal display device composed of a liquid crystal element having a memory property is used as the display unit, image data is displayed on the display unit 13. Can stop the power supply to the temperature control function (heating by the heater 16) and the display function (function to rewrite display contents), and can reduce power consumption.
In particular, in the case of battery driving, if the heater 16 is always heated, it is difficult to install at a low temperature due to excessive battery consumption. However, heating is performed by supplying power to the heater 16 only when the display content is rewritten. Therefore, even if it is a battery drive, the shelf label terminal 10 provided with the heater 16 is implement | achieved, and low-temperature installation, such as a refrigeration case, can be performed. That is, since the temperature range in which the shelf label terminal 10 can be operated can be expanded, the shelf label terminal 10 can be installed in various temperature environments in the store. In the case of external power supply, energy saving is achieved.

  2 and 3, a program for realizing the functions of the shelf label terminal 10 and the ESL server 20 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system. By executing, display control in consideration of the standby time in the first to fifth embodiments may be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Electronic shelf label system 10, 10-1, 10-2 Shelf label terminal 11, 21 Control part 12 Display part 13 Storage part 14 Wireless communication part 15 Temperature sensor 16 Heater 20 ESL server 22 Wired communication part 23 Memory 24 Storage apparatus 30 30-1, 30-2 Wireless repeater 40 Network

Claims (12)

A management device in an electronic shelf label system in which a display unit having a memory property, a shelf label terminal having a temperature sensor and a heater, and a management device are communicably connected,
A receiving unit that receives temperature information indicating the temperature of the shelf label terminal from the shelf label terminal;
A storage unit that stores a current temperature and a standby time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the current temperature by heating with the heater; ,
A transmission unit for transmitting data to the shelf label terminal;
The standby time corresponding to the current temperature indicated by the temperature information received from the shelf label terminal is read from the storage unit, and after the standby time has elapsed, from the transmission unit to the shelf label terminal, to the shelf label terminal And a control unit that transmits image data to be displayed. The storage unit stores, for each of the shelf label terminals, installation information indicating whether the shelf label terminal requires a standby time or an unnecessary shelf label terminal.
The control unit reads the installation information from the storage unit, and waits for the transmission of the image data to the shelf label terminal that requires a waiting time, while the image data for the shelf label terminal that does not require a waiting time is sent to the transmitting unit. The management apparatus according to claim 1, wherein transmission is performed. A shelf label terminal in an electronic shelf label system in which a shelf label terminal and a management device are communicably connected,
A temperature sensor that measures the temperature of the shelf label terminal,
A heater,
A transmission unit for transmitting data to the management device;
A receiving unit for receiving data from the management device;
A display unit having memory characteristics for displaying image data;
When a temperature transmission request for the shelf label terminal is received from the management device, the measurement result of the temperature sensor is transmitted from the transmission unit to the management device, the heater is turned on, and the transmission request is received. And a control unit that controls the heater to be turned off by displaying the image data on the display unit when image data is received from the management device. A management device in an electronic shelf label system in which a display unit having a memory property, a shelf label terminal having a temperature sensor and a heater, and a management device are communicably connected,
The shelf label terminal receives, from the shelf label terminal, a waiting time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the present by heating by the heater. A receiver,
A transmission unit for transmitting data to the shelf label terminal;
And a control unit configured to transmit image data to be displayed on the shelf label terminal from the transmission unit to the shelf label terminal after the standby time has elapsed since the reception of the standby time. A shelf label terminal in an electronic shelf label system in which a shelf label terminal and a management device are communicably connected,
A temperature sensor that measures the temperature of the shelf label terminal,
A heater,
A storage unit that stores a current temperature and a standby time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the current temperature by heating with the heater; ,
A transmission unit for transmitting data to the management device;
A receiving unit for receiving data from the management device;
A display unit having memory characteristics for displaying image data;
When the transmission request for the standby time of the shelf label terminal is received from the management device, the standby time corresponding to the current temperature measured by the temperature sensor is read from the storage unit, and the standby time is sent to the management device to the management device. Control to turn on the heater, and when the image data is received from the management apparatus after receiving the transmission request, the image data is displayed on the display unit and the heater is turned off. A shelf label terminal characterized by comprising: A shelf label terminal in an electronic shelf label system in which a shelf label terminal and a management device are communicably connected,
A temperature sensor that measures the temperature of the shelf label terminal,
A heater,
A storage unit that stores a current temperature and a standby time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the current temperature by heating with the heater; ,
A transmission unit for transmitting data to the management device;
A receiving unit for receiving image data from the management device;
A display unit having memory characteristics for displaying image data;
When the image data is received from the management device, the standby time corresponding to the current temperature measured by the temperature sensor is read from the storage unit, the heater is turned on, and the standby time is read from the standby time. A shelf label terminal comprising: a control unit that displays the image data on the display unit and controls the heater to be turned off after a lapse of time. A management device in an electronic shelf label system in which a display unit having a memory property, a shelf label terminal having a temperature sensor and a heater, and a management device are communicably connected,
A transmission unit for transmitting image data to be displayed on the shelf label terminal to the shelf label terminal;
The shelf label terminal sets the waiting time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the present by heating by the heater after transmitting the image data. A receiving unit for receiving from a shelf label terminal;
After the standby time has elapsed since the reception of the standby time, a display result indicating whether or not the image data has been normally displayed on the display unit of the shelf label terminal from the transmission unit to the shelf label terminal is displayed. And a control unit for transmitting a display confirmation command to be transmitted to the management device. A shelf label terminal in an electronic shelf label system in which a shelf label terminal and a management device are communicably connected,
A temperature sensor that measures the temperature of the shelf label terminal,
A heater,
A storage unit that stores a current temperature and a standby time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the current temperature by heating with the heater; ,
A transmission unit for transmitting data to the management device;
A receiving unit for receiving image data from the management device;
A display unit having memory characteristics for displaying the image data;
When the image data is received from the management device, the standby time corresponding to the current temperature measured by the temperature sensor is read from the storage unit, the standby time read from the transmission unit to the management device is transmitted, and the heater is When the control unit is turned on and the standby time has elapsed after reading the standby time, the image data is displayed on the display unit, the heater is controlled to be turned off, and a display confirmation command is received from the management device. A shelf label terminal comprising: a control unit configured to transmit a response signal including a display result indicating whether or not the display unit has normally displayed the image data from the transmission unit to the management device. An electronic shelf label system in which a shelf label terminal and a management device are communicably connected,
The management device
A first transmission unit for transmitting image data to be displayed on the shelf label terminal to the shelf label terminal;
The shelf label terminal sets the waiting time required to reach an operable temperature range in which the display unit can rewrite and display the display content from the present by heating by the heater after transmitting the image data. A first receiving unit for receiving from a shelf label terminal;
Display result indicating whether or not the image data is normally displayed on the display unit of the shelf label terminal from the first transmission unit to the shelf label terminal after the standby time received from the shelf label terminal has elapsed And a first control unit for transmitting a display confirmation command for transmitting to the management device,
The shelf label terminal is
A temperature sensor that measures the temperature of the shelf label terminal,
A heater,
A storage unit for storing temperature control information in which the current temperature is associated with the waiting time;
A second transmission unit for transmitting data to the management device;
A second receiving unit for receiving image data from the management device;
A display unit having memory characteristics for displaying image data;
When the image data is received from the management device, the standby time associated with the current temperature measured by the temperature sensor is read from the storage unit, the read standby time is transmitted from the transmission unit to the management device, After the standby time has elapsed since the heater was turned on and the standby time was read, the image data is displayed on the display unit, the heater is turned off, and a display confirmation command is received from the management device A second control unit that transmits a response signal including a display result indicating whether or not the display unit has normally displayed the image data from the transmission unit to the management device. Electronic shelf label system to do. An electronic shelf to which a temperature sensor, a heater, a shelf label terminal having a display unit having a memory property, and a management device having a storage unit for storing image data to be displayed on the shelf label terminal are communicably connected. A bill system,
The management device
A temperature adjustment command transmitting means for transmitting a temperature adjustment command including an instruction to transmit the temperature information of the shelf label terminal to the shelf label terminal;
Image data transmitting means for transmitting the image data in the storage unit to the shelf label terminal after a predetermined waiting time based on the temperature information of the shelf label terminal included in the response to the temperature adjustment command. ,
The shelf label terminal is
Image data display means for receiving the image data and displaying the image data on the display unit;
Temperature information transmission means for receiving the temperature adjustment command and transmitting temperature information of the shelf label terminal to the management device as a measurement result of the temperature sensor;
The temperature adjustment command is received and the heater is turned on, and the image data display means has a temperature adjustment means for controlling the heater off after the image data is displayed.
The standby time is required for the shelf label terminal to reach an operable temperature range in which the display unit can rewrite and display the display content from the current temperature by controlling the heater to be on. Time,
The shelf label terminal or the management device has a temperature adjustment table in which the current temperature and the standby time are associated with each other.
The image data transmission means acquires the standby time based on the temperature adjustment table from the shelf label terminal or the management device, and waits for transmission of the image data.
An electronic shelf label system characterized by that. The temperature adjustment command further includes the image data,
The image data transmission means transmits an instruction to display the image data included in the temperature adjustment command and transmitted earlier;
The electronic shelf label system according to claim 11, wherein: A shelf label terminal having a temperature sensor, a heater, and a display unit having a memory property, and a management device having a first storage unit for storing image data to be displayed on the shelf label terminal are connected to be communicable. Electronic shelf label system,
The management device
A temperature adjustment command transmitting means for transmitting a temperature adjustment command including the image data to the shelf label terminal;
The shelf label terminal is
After the shelf label terminal controls the heater to turn on, the waiting time required for reaching the operable temperature range in which the display unit can rewrite and display the display content from the current temperature, or the display A second storage unit that stores, as a rewritable condition, a rewritable temperature at which the unit can rewrite and display the display content;
Rewritable condition confirmation means for determining whether the shelf label terminal satisfies the rewritable condition after the heater is turned on;
Receiving the temperature adjustment command and controlling the heater to be turned on, and when the rewritable condition confirmation means determines that the rewritable condition has been satisfied, the temperature adjusting means for controlling the heater to be turned off;
An electronic shelf label system, comprising: image data display means for displaying the image data on the display unit when the rewritable condition confirmation means determines that the rewritable condition is satisfied.

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