JP2013020059A - Display system, transmission device and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more stably supply power, by non-contact power supply, to a display device that receives display information by radio.SOLUTION: A transmission device transmits power to a display device by radio through a first antenna and transmits display information to the display device by radio through a second antenna. The display device having a display unit receives the display information from the transmission device by radio through a fourth antenna, controls display of the display unit according to the received display information, receives the transmission of power from the transmission device by radio through a third antenna, and supplies power to the display unit or the like.

Description

  The present invention relates to a technique for wirelessly communicating information and transmitting power between devices.

  In various industrial fields including the manufacturing industry, barcodes have long been used as a medium for identifying individual devices. In recent years, it has become widespread that individual identification is performed by wireless communication instead of a barcode. A specific example of such wireless communication is RFID (Radio Frequency Identification). However, when RFID is used, it is possible to record on individual devices (in this case, IC tags) by wireless communication. However, in order for humans to refer to the recorded information, recording is possible. A dedicated device for reading out the recorded information is required.

  In order to enable humans to refer to information without using a dedicated device, a technique using a display device such as rewritable paper, a thin display, or electronic paper has also been proposed. In such a technique, information that a human needs to refer to, such as a manufacturing status of a product, is transmitted to the display device wirelessly, and the information is displayed on the display device. Electric power is required for the operation of such a display device, but a technique of supplying electric power wirelessly by applying a non-contact power feeding technique has also been proposed (see Patent Document 1).

JP 2003-216111 A

However, when the non-contact power feeding technique is applied as described in Patent Document 1, there is a problem that it is difficult to stably supply power to the display device.
In view of the above circumstances, an object of the present invention is to provide a technique for supplying power more stably by non-contact power supply to a display device that receives display information wirelessly.

  One embodiment of the present invention is a display system including a transmission device and a display device, and the transmission device wirelessly powers the display device via a first antenna, a second antenna, and the first antenna. And a first communication control unit that wirelessly transmits display information to the display device via the second antenna, the display device includes a third antenna, a fourth antenna, A display unit that performs display; a second communication control unit that wirelessly receives display information from the transmission device via the fourth antenna; and the display unit according to display information received by the second communication control unit A display control unit for controlling the display of the display, and wireless transmission of power from the transmission device via the third antenna, and supplying power to the display unit, the second communication control unit, and the display control unit A power supply unit.

  One embodiment of the present invention is the above display system, in which the frequency of the electromagnetic wave output from the first antenna is different from the frequency of the electromagnetic wave output from the second antenna.

  One embodiment of the present invention is the above display system, in which the frequency of the electromagnetic wave output from the second antenna is higher than the frequency of the electromagnetic wave output from the first antenna.

  One aspect of the present invention is the display system described above, wherein the transmission device further includes a third communication control unit that performs wireless communication using a communication method different from the first communication control unit, and the display device includes: The apparatus further includes a fourth communication control unit that performs wireless communication using a communication method different from that of the second communication control unit, and the third communication control unit is provided in advance to the display device from the fourth communication control unit. Terminal identification information is received.

  One aspect of the present invention is the display system described above, wherein the transmission device further includes a fifth antenna, the display device further includes a sixth antenna, and the third communication control unit includes the fifth antenna. The fourth communication control unit performs wireless communication with the transmission device via the sixth antenna, and performs wireless communication with the display device via an antenna.

  One aspect of the present invention is the display system described above, wherein the display device further includes a power storage unit that stores power, and the power supply unit is configured to transmit power received from the transmission device via the third antenna. A part or the whole is stored in the power storage unit.

  One embodiment of the present invention is a transmission device that wirelessly communicates with a display device that performs display in accordance with display information, and the first antenna, the second antenna, and the power for operating the display device A power feeding unit that wirelessly transmits to the display device via one antenna, and a first communication control unit that wirelessly transmits display information to the display device via the second antenna.

  One aspect of the present invention is a display device that wirelessly communicates with a transmission device that wirelessly transmits power via a first antenna and wirelessly transmits display information via a second antenna, the third antenna; A fourth antenna, a display unit that performs display, a communication control unit that wirelessly receives display information from the transmission device via the fourth antenna, and the display according to display information received by the communication control unit A display control unit that controls display of the unit, and power that wirelessly receives power transmission from the transmission device via the third antenna and supplies power to the display unit, the communication control unit, and the display control unit A supply unit.

  According to the present invention, it is possible to supply power more stably by non-contact power supply to a display device that receives display information wirelessly.

It is a system configuration figure showing the system configuration of a first embodiment of a display system. It is a sequence diagram showing the flow of operation | movement of 1st embodiment of a display system. It is a system configuration figure showing the system configuration of a second embodiment of a display system. It is a figure which shows the outline of a display data table. It is a system configuration figure showing the system configuration of a third embodiment of a display system. It is a system configuration | structure figure showing the system configuration | structure of 4th embodiment of a display system. It is a sequence diagram showing the flow of operation | movement of 4th embodiment of a display system. It is a system configuration figure showing the system configuration of a fifth embodiment of a display system. It is a system configuration | structure figure showing the system configuration | structure of 6th embodiment of a display system. It is a sequence diagram showing the flow of operation | movement of 6th embodiment of a display system. It is a figure which shows the outline of the process management system 200 to which said display system is applied. 4 is a sequence diagram illustrating an example of a communication flow in a process management system 200. FIG. It is a figure showing the example of the screen displayed on the display part 206 of the display apparatus 20e in the process management system 200. FIG. It is a figure showing the example of the screen displayed on the display part 206 of the display apparatus 20e in the process management system 200. FIG.

[Outline]
The display system of the present invention includes a transmission device and a display device. Each of the transmission device and the display device includes a plurality of antennas. The transmission device wirelessly transmits power to the display device using one antenna, and transmits data to the display device using another antenna. The display device receives power from the display device using one antenna and operates with the received power. The display device further receives data from the transmission device using another antenna. In the display system, an antenna for transmitting power and an antenna for transmitting and receiving data are provided independently of each other. For this reason, it is possible to supply power more stably to the display device that receives data wirelessly by non-contact power feeding.

As a specific example of data transmitted from the transmission device, there is display information. The display information is information representing the display content displayed on the display device. The display information may be image data (hereinafter referred to as “display data”) itself displayed on the display device, or identification information indicating the display data (hereinafter referred to as “display identification information”). It may be character string data representing characters displayed on the display device, data in a unique format representing the contents of display data, or other forms of data. Also good. The display content may be determined by the transmission device, or may be determined by an external device (for example, a management server 50 described later) connected to the transmission device.
The display device performs display based on the display information transmitted from the transmission device with the power transmitted from the transmission device.
Hereinafter, a plurality of embodiments of the display system will be described.

[First embodiment]
FIG. 1 is a system configuration diagram showing a system configuration of a first embodiment (display system 100) of a display system. The display system 100 includes a transmission device 10 and a display device 20.
The transmission device 10 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device, and the like connected by a bus. The transmission device 10 functions as a device including the first antenna 101, the second antenna 102, the power feeding unit 103, the display information generation unit 104, and the first communication control unit 105 by executing a transmission program. All or some of the functions of the transmission device 10 may be realized by using hardware such as an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA). The transmission program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system.

  The first antenna 101 is an antenna for performing non-contact power feeding, and transmits power to the third antenna 201 of the display device 20. A specific structure of the first antenna 101 is appropriately designed according to a non-contact power feeding method applied to the display system 100. Specific examples of the non-contact power supply method applied to the display system 100 include an electromagnetic induction method, a radio wave method, and an electromagnetic resonance method. For example, when an electromagnetic induction method is applied as a non-contact power supply method, the first antenna 101 may be configured as a loop antenna suitable for this method.

  The second antenna 102 is an antenna for transmitting and receiving data. For example, the second antenna 102 wirelessly transmits data to the fourth antenna 202 of the display device 20. A specific structure of the second antenna 102 is appropriately designed according to a wireless communication method applied to the display system 100. Specific examples of the wireless communication method applied to the display system 100 include a communication method compliant with IEEE 802.15.4, Bluetooth (registered trademark), RFID (Radio Frequency Identification), and the like. For example, when a communication system conforming to IEEE 802.15.4 is applied as the wireless communication system, the second antenna 102 is a UHF (Ultra High Frequency) band like a dipole antenna suitable for this system. It may be configured as an antenna suitable for the communication.

The power supply unit 103 includes a power source, and supplies power to the display device 20 through the first antenna 101 in a non-contact manner. A specific configuration of the power supply unit 103 is appropriately designed according to a non-contact power supply method applied to the display system 100.
The display information generation unit 104 generates display information representing the display content on the display unit 206 of the display device 20 and outputs the display information to the first communication control unit 105. The display information generated by the display information generation unit 104 is image data (display data) displayed by the display device 20. The display data may or may not be compressed. When generating display information, the display information generation unit 104 generates display information according to a predetermined format or protocol.

  The first communication control unit 105 modulates data to be transmitted to generate a radio signal, and transmits the radio signal via the second antenna 102. As a specific example of data to be transmitted, there is display information generated by the display information generation unit 104. A specific configuration of the first communication control unit 105 is appropriately designed according to a wireless communication method applied to the display system 100.

  The display device 20 includes a CPU, a memory, an auxiliary storage device, and the like connected by a bus. The display device 20 functions as a device including a third antenna 201, a fourth antenna 202, a power supply unit 203, a second communication control unit 204, a display control unit 205, and a display unit 206 by executing a display program. All or some of the functions of the display device 20 may be realized using hardware such as an ASIC, PLD, or FPGA. The display program may be recorded on a computer-readable recording medium.

  The third antenna 201 is an antenna for performing non-contact power feeding, and receives power transmitted from the first antenna 101 of the transmission device 10. A specific structure of the third antenna 201 is appropriately designed according to a non-contact power feeding method applied to the display system 100. For example, when the electromagnetic induction method is applied as a non-contact power feeding method, the third antenna 201 may be configured as a loop antenna suitable for this method.

  The fourth antenna 202 is an antenna for transmitting and receiving data. For example, the fourth antenna 202 receives a radio signal transmitted from the second antenna 102 of the transmission device 10. The specific structure of the fourth antenna 202 is appropriately designed according to the wireless communication method applied to the display system 100. The fourth antenna 202 is configured as an antenna suitable for UHF band communication such as a dipole antenna suitable for this method when a communication method compliant with IEEE 802.15.4 is applied as a wireless communication method, for example. May be.

The power supply unit 203 supplies the power received from the transmission device 10 via the third antenna 201 to each function of the display device 20. A specific configuration of the power supply unit 203 is appropriately designed according to a non-contact power feeding method applied to the display system 100.
The second communication control unit 204 demodulates the radio signal received by the fourth antenna 202 and restores the data transmitted from the transmission device 10. Display information is a specific example of data to be restored. The second communication control unit 204 outputs the received display information to the display control unit 205. A specific configuration of the second communication control unit 204 is appropriately designed according to a wireless communication method applied to the display system 100.

The display control unit 205 controls the content displayed on the display unit 206 according to the display information received from the transmission device 10.
The display unit 206 is configured using a display device that does not require power to maintain display. A specific example of such a display device is electronic paper. The electronic paper method applied to the display unit 206 may be any method such as a microcapsule method, an electronic powder fluid method, a liquid crystal method, an electrowetting method, an electrophoresis method, or a chemical change method. When the display control unit 205 a instructs the display unit 206 to update the display content, the display unit 206 performs a display content update process using the power supplied from the power supply unit 203.

  FIG. 2 is a sequence diagram showing an operation flow of the first embodiment (display system 100) of the display system. First, the power feeding unit 103 of the transmission device 10 starts transmitting power via the first antenna 101 (step S11). The power supply unit 203 of the display device 20 receives power transmission via the third antenna 201, and starts supplying power to the display device 20 (step S21). In particular, the power supply unit 203 supplies power to the second communication control unit 204, the display control unit 205, and the display unit 206.

The display information generation unit 104 of the transmission device 10 generates display information (step S12). The first communication control unit 105 generates a wireless signal by performing encoding processing and modulation processing on the display information, and transmits the wireless signal from the second antenna 102 (step S13). The second communication control unit 204 of the display device 20 receives the radio signal via the fourth antenna 202, and restores the display information by performing demodulation processing and decoding processing on the radio signal (step S22). The display control unit 205 performs display content update control on the display unit 206 based on the restored display information (step S23). That is, the display control unit 205 causes the display unit 206 to display an image represented by the display data of the received display information. The display unit 206 receives the update control and displays the updated display content (step S24).
Thereafter, the power supply unit 103 of the transmission device 10 ends the transmission of power through the first antenna 101 (step S14). Accordingly, the power supply unit 203 of the display device 20 ends the supply of power (step S25).

  In the first embodiment (display system 100) of the display system configured as described above, the display device 20 is supplied with electric power from the transmission device 10 by non-contact power feeding. Therefore, the display device 20 does not need to include a power cable for receiving power supply from an external power source, a storage battery that stores power in advance, or the like. Therefore, the moving range of the display device 20 is not limited to the power cable, and it is not necessary to replace the battery. Similarly, there is no period during which charging is performed, that is, the period during which the display device 20 cannot be used for charging.

  In the display system 100, the antenna for transmitting power from the transmitting device 10 (first antenna) and the antenna for transmitting data such as display information (second antenna) from the transmitting device 10 are different antennas. Provided. Similarly, an antenna (third antenna) for the display device 20 to receive power transmission and an antenna (fourth antenna) for the display device 20 to receive data such as display information are provided as different antennas. It is done. Therefore, it is possible to supply power more stably to the display device 20 that receives data wirelessly by non-contact power feeding.

This will be described in more detail as follows. In the transmission device 10 and the display device 20, the antenna for power transmission (first antenna and third antenna) and the antenna for data transmission / reception (second antenna and fourth antenna) are provided as different antennas, respectively. ing. Therefore, it is possible to set the frequency of the electromagnetic wave used for power transmission and the frequency of the electromagnetic wave used for data transmission / reception to frequencies suitable for each (frequency different from each other). For example, the frequency output from the second antenna may be set to be higher than the frequency of the electromagnetic wave output from the first antenna. By setting in this way, data transmission / reception can be performed at high speed, and power transmission can be performed more stably.
Furthermore, each antenna can be designed as a shape suitable for each frequency and method. Therefore, non-contact power transmission can be performed more stably. Similarly, data transmission / reception can be performed more stably, and can be performed in a wider band.

  The display system 100 can wirelessly transmit power and transmit / receive data as described above. Therefore, there is no need for a conductor (for example, metal) contact between the transmission device 10 and the display device 20. Therefore, the contact cannot be worn, the life of the display device 20 can be extended, and the availability can be increased.

  Further, the display system 100 can solve the following conventional problems. Conventionally, various means have been used as means for displaying information transmitted to a user. For example, paper, rewritable paper, thin displays and the like have been used. However, each had the following problems.

In the case of paper, in order to rewrite information once displayed, it is necessary to erase the displayed (written) information with an eraser or the like, and then write new information. Therefore, it is difficult to automate such work.
In the case of rewritable paper, it can be rewritten by a dedicated rewriting device such as a rewrite printer. However, the number of rewritable times is limited to about several hundreds, and when the number of rewritable times increases, display deterioration such as a gradually thinning of the display or a dirty display occurs. In addition, since it is necessary to perform contact rewriting when rewriting the display, frequent maintenance of the system, such as cleaning the printer head, is necessary.

In the case of a thin display, although the number of rewrites is large, the power consumption is large, and in order to drive with a battery, work such as battery replacement and charging is frequently required. Further, since power is always consumed to hold the display screen, it is difficult to supply power.
On the other hand, in the display system 100 described above, a display device that has a large number of rewrites and does not require power consumption to maintain display, such as electronic paper, is applied as the display device. Therefore, it is possible to solve any of the above problems.

<Modification>
In the sequence diagram of FIG. 2, the power feeding unit 103 of the transmission device 10 starts power transmission in step S <b> 11 and ends power transmission in step S <b> 14. The timing of these processes may be set in any way. For example, the transmission device 10 may be provided with an input device such as a button, and power transmission may be started / finished when a user operates the input device. For example, the transmission of power may be started when the display device 20 is disposed at a predetermined location (for example, disposed on the transmission device 10). In this case, the transmission of power may be terminated when the display device 20 is removed from a predetermined location (for example, removed from above the transmission device 10). The arrangement of the display device 20 may be detected, for example, by installing a pressure sensor at the predetermined location.

  In the sequence diagram of FIG. 2, the power feeding unit 103 of the transmission device 10 starts power transmission in step S <b> 11 and ends power transmission in step S <b> 14. However, the power supply unit 103 of the transmission device 10 may be configured to always continue to transmit power without performing the processing in step S11 and the processing in step S14. In this case, when the power supply unit 203 of the display device 20 approaches the transmission device 10 to a distance where the power transmitted from the power supply unit 103 can be received, the power supply unit 203 receives the power transmission, and the power supply unit 203 of the display device 20 Supply of power to each function is started (step S21). On the other hand, when the power supply unit 203 of the display device 20 moves away from the transmission device 10 to a distance where power transmitted from the power supply unit 103 cannot be received, the power supply unit 203 supplies power to each function of the own device (display device 20). Is finished (step S25).

[Second Embodiment]
FIG. 3 is a system configuration diagram showing the system configuration of the second embodiment (display system 100a) of the display system. The same functional parts as those in the first embodiment are denoted by the same reference numerals as those in FIG. 1 in FIG.
The display system 100a includes a transmission device 10a and a display device 20a. The transmission device 10a is different from the transmission device 10 of the first embodiment in that a display information generation unit 104a is provided instead of the display information generation unit 104, and other configurations are the same. The display device 20a is different from the display device 20 of the first embodiment in that it includes a display control unit 205a instead of the display control unit 205 and further includes a display data storage unit 207, and other configurations are the same.

  The display information generation unit 104a is different from the display information generation unit 104 of the first embodiment in display information to be generated. The display information generated by the display information generation unit 104a is identification information (display identification information) representing image data (display data) displayed by the display device 20. That is, the display information generation unit 205a generates display information by selecting display identification information according to the determined display content.

  The display data storage unit 207 is configured using a storage device such as a magnetic hard disk or a semiconductor storage device. The display data storage unit 207 stores a display data table. FIG. 4 is a diagram showing an outline of the display data table. The display data table is a table in which display identification information and display data are associated with each other. The display identification information item contains display identification information. The display data item contains information necessary for the display control unit 205a to access the display data. The display data item may contain, for example, the address of the recording area in which the display data is recorded, the file name of the display data, or other information. Also good.

The display control unit 205a searches the display data storage unit 207 for display data corresponding to the display information (display identification information) received from the transmission device 10a. Then, the display control unit 205a causes the display unit 206 to display display data obtained as a search result.
The operation flow of the display system 100a is as shown in FIG.

  In the second embodiment (display system 100a) of the display system configured as described above, not the display data but display identification information is transmitted from the transmission device 10a to the display device 20a. For this reason, it is possible to reduce the volume of data to be transmitted compared to the case where display data that is image data is transmitted. Therefore, wireless communication components applied to the first communication control unit 105 and the second communication control unit 204 can be made cheaper and the cost can be reduced. In addition, since the volume of data to be transmitted is reduced, communication can be completed in a short time. In addition, it is possible to reduce power consumption when the first communication control unit 105 transmits display information from the second antenna 102, thereby suppressing power consumption.

<Modification>
In the first embodiment and the second embodiment, the system configuration when display data is used as a specific example of display information and the system configuration when display identification information is used have been described. However, as described above, specific examples of display information are not limited to these two. Therefore, display information of other forms may be transmitted and received by modifying the first embodiment (display system 100) or the second embodiment (display system).
The display system 100a may be modified and configured similarly to the first embodiment (display system 100).

[Third embodiment]
FIG. 5 is a system configuration diagram showing the system configuration of the third embodiment (display system 100b) of the display system. The same functional parts as those in the first embodiment are denoted by the same reference numerals as those in FIG. 1 in FIG.
The display system 100b includes a transmission device 10 and a display device 20b. The display device 20b is different from the display device 20 of the first embodiment in that it includes a power supply unit 203b instead of the power supply unit 203 and further includes a power storage unit 2031. The other configurations are the same.

The power storage unit 2031 stores part or all of the power received from the transmission device 10 by the power supply unit 203b. The power stored in the power storage unit 2031 is supplied to each functional unit of the display device 20b according to the control of the power supply unit 203b.
The power supply unit 203b causes the power storage unit 2031 to store the power remaining from supplying power necessary for each function of the display device 20 out of the power received from the transmission device 10 via the fourth antenna 202. . The power supply unit 203b discharges the power stored in the power storage unit 2031 when it is necessary to supply power to each function of the display device 20 but is not receiving power transmission from the transmission device 10. To supply power to each function.
The operation flow of the display system 100b is as shown in FIG.

  In the third embodiment (display system 100b) of the display system configured as described above, the power supply unit 203b receives power transmission when the transmission device 10 cannot perform power transmission due to a failure or the like. Even when the power cannot be supplied, the power supply unit 203b can supply the power stored in the power storage unit 2031. For this reason, the availability of the display device 20b can be improved.

  In the third embodiment of the display system configured as described above (display system 100b), the display unit 206 can use a display device that requires some power to maintain display. In other words, any display device that can maintain display with the power stored in the power storage unit 2031 can be applied to the display unit 206. Therefore, the display device options applicable to the display unit 206 are expanded.

<Modification>
The power supply unit 203b may be configured to store all of the power received from the transmission device 10 once in the power storage unit 2031 and then supply power to each functional unit.
The display system 100b may be modified and configured similarly to the first embodiment (display system 100) and the second embodiment (display system 100a). The display system 100b may be configured in combination with the functional unit of the second embodiment (display system 100a).

[Fourth embodiment]
FIG. 6 is a system configuration diagram showing the system configuration of the fourth embodiment (display system 100c) of the display system. The same functional parts as those in the first embodiment are denoted by the same reference numerals as those in FIG. 1 in FIG.
The display system 100c includes a transmission device 10c and a display device 20c. The transmission device 10c differs from the transmission device 10 of the first embodiment in that it includes a second antenna 102c instead of the second antenna 102, and further includes a third communication control unit 106 and a first identification information processing unit 107. Other configurations are the same. The display device 20c differs from the display device 20 of the first embodiment in that it includes a fourth antenna 202c instead of the fourth antenna 202, and further includes a fourth communication control unit 208 and a second identification information processing unit 209. Other configurations are the same.

  The second antenna 102 c transmits not only the signal output from the first communication control unit 105 but also the signal output from the third communication control unit 106. The second antenna 102 c receives the signal transmitted from the display device 20 c and outputs the received signal to the third communication control unit 106. As described above, the second antenna 102c is used for a plurality of (two in FIG. 6) different types of wireless communication.

  The third communication control unit 106 performs wireless communication using a communication method different from that of the first communication control unit 105. The third communication control unit 106 performs wireless communication with the fourth communication control unit 208 of the display device 20c, and receives terminal identification information assigned to the display device 20c. For example, an RFID reading device may be applied to the third communication control unit 106. In this case, the third communication control unit 106 operates according to the RFID protocol and receives a signal from the display device 20c via the second antenna 102c. The third communication control unit 106 demodulates the received signal and restores the data transmitted from the display device 20c. The third communication control unit 106 outputs the restored data to the first identification information processing unit 107.

The first identification information processing unit 107 extracts terminal identification information from the data received by the third communication control unit 106 and performs a predetermined process. For example, when the first identification information processing unit 107 extracts the terminal identification information, the first identification information processing unit 107 transmits the extracted terminal identification information and the transmission device identification information preliminarily assigned to the own device (the transmission device 10c) to a predetermined external device. To send.
The fourth antenna 202c not only receives a signal transmitted from the second antenna 102c under the control of the first communication control unit 105 of the transmission device 10c, but also transmits from the second antenna 102c under the control of the third communication control unit 106. The received signal is also received. Furthermore, the fourth antenna 202c transmits a signal output from the fourth communication control unit 208. As described above, the fourth antenna 202c is used for wireless communication of a plurality of (two in FIG. 6) different systems.

The fourth communication control unit 208 performs wireless communication using a communication method different from that of the second communication control unit 204. The fourth communication control unit 208 performs wireless communication with the third communication control unit 106 of the transmission device 10c, and transmits terminal identification information assigned to the own device (display device 20c). An RFID IC tag may be applied to the fourth communication control unit 208. In this case, the fourth communication control unit 208 operates according to the RFID protocol, and modulates and transmits the transmission data output from the second identification information processing unit 209.
The second identification information processing unit 209 stores terminal identification information in advance. The second identification information processing unit 209 generates transmission data including terminal identification information and outputs the data to the fourth communication control unit 208.

  FIG. 7 is a sequence diagram showing an operation flow of the fourth embodiment (display system 100c) of the display system. In FIG. 7, the same processes as those in the first embodiment (display system 100) are denoted by the same reference numerals as those in FIG. A description of the same processing as in the first embodiment is omitted.

  The third communication control unit 106 of the transmission device 10c transmits a request signal (step S15). When receiving the request signal (step S26), the fourth communication control unit 208 of the display device 20c demodulates the received request signal and outputs it to the second identification information processing unit 209. In response to receiving the request signal, the second identification information processing unit 209 generates transmission data including the terminal identification information of the own device and outputs the data to the fourth communication control unit 208. The fourth communication control unit 208 modulates and transmits data for transmission (step S27). When receiving a signal from the display device 20c (step S16), the third communication control unit 106 of the transmission device 10c demodulates the received signal and outputs the restored data to the first identification information processing unit 107. The first identification information processing unit 107 extracts terminal identification information from the restored data, and outputs the terminal identification information and the transmission device identification information (step S17).

  In the fourth embodiment (display system 100c) of the display system configured as described above, the first communication control unit 105 and the second communication control unit are provided between the third communication control unit 106 and the fourth communication control unit 208. Wireless communication is performed in a manner different from the wireless communication performed with 204. Specifically, the terminal identification information assigned to the display device 20c is transmitted to the transmission device 10c. Therefore, it becomes easy to manage the display device 20c that is the transmission destination of the display information in the transmission device 10c.

<Modification>
In FIG. 7, the sequence of steps S12, S13, and S22 to S24 and the sequence of steps S15, S26, S27, S16, and S17 may be executed in a different order, or part or all of them. May be executed in parallel.
The display system 100c may be modified and configured similarly to the first embodiment (display system 100) to the third embodiment (display system 100b). The display system 100c may be configured in combination with the functional units of the second embodiment (display system 100a) or the third embodiment (display system 100b).

[Fifth embodiment]
FIG. 8 is a system configuration diagram showing the system configuration of the fifth embodiment (display system 100d) of the display system. The same functional parts as those in the fourth embodiment are denoted by the same reference numerals as those in FIG. 6 in FIG.
The display system 100d includes a transmission device 10d and a display device 20d. The transmitting device 10d is fourth in that it includes the second antenna 102 instead of the second antenna 102c, includes a third communication control unit 106d instead of the third communication control unit 106, and further includes a fifth antenna 108. Unlike the transmission device 10c of the embodiment, other configurations are the same. The display device 20d is fourth in that it includes a fourth antenna 202 instead of the fourth antenna 202c, includes a fourth communication control unit 208d instead of the fourth communication control unit 208, and further includes a sixth antenna 210. Unlike the display device 20c of the embodiment, other configurations are the same.

The third communication control unit 106d is different from the third communication control unit 106 of the fourth embodiment in that communication is performed via the fifth antenna 108, and other configurations are the same.
The fifth antenna 108 is an antenna for transmitting and receiving data. For example, the fifth antenna 108 wirelessly communicates data with the sixth antenna 210 of the display device 20d. The specific structure of the fifth antenna 108 is appropriately designed according to the wireless communication method applied to the display system 100d. However, the wireless communication method performed via the fifth antenna 108 is different from the wireless communication method performed via the second antenna 102. In the following description, the wireless communication method performed via the fifth antenna 108 is a communication method according to RFID. In this case, the fifth antenna 108 may be configured as an antenna of an IC tag compliant with, for example, ISO15693.

The fourth communication control unit 208d differs from the fourth communication control unit 208 of the fourth embodiment in that communication is performed via the sixth antenna 210, and the other configuration is the same.
The sixth antenna 210 is an antenna for transmitting and receiving data. For example, the sixth antenna 210 wirelessly communicates data with the fifth antenna 108 of the transmission device 10d. The specific structure of the sixth antenna 210 is appropriately designed according to the wireless communication method applied to the display system 100d. However, the wireless communication method performed via the sixth antenna 210 is different from the wireless communication method performed via the fourth antenna 202. In the following description, the wireless communication method performed via the sixth antenna 210 is a communication method according to RFID. In this case, the sixth antenna 210 may be configured as an antenna of an IC tag compliant with, for example, ISO15693.
Since the operation flow of the display system 100d is as shown in FIG. 7, the description thereof is omitted.

  In the fifth embodiment (display system 100d) of the display system configured as described above, the wireless communication performed between the third communication control unit 106d and the fourth communication control unit 208d is the first communication control unit 105 and It is performed using an antenna (fifth antenna 108 and sixth antenna 210) different from the antenna (second antenna 102 and fourth antenna 202) used in wireless communication performed with the second communication control unit 204. . Therefore, the frequency of the electromagnetic wave used in the wireless communication between the first communication control unit 105 and the second communication control unit 204 and the wireless communication between the third communication control unit 106d and the fourth communication control unit 208d are used. It is possible to set the frequency of the generated electromagnetic wave to a frequency suitable for each (frequency different from each other). Furthermore, each antenna can be designed as a shape suitable for each frequency and method. Therefore, it is possible to perform each wireless communication more stably or in a wider band.

<Modification>
The display system 100d may be modified and configured similarly to the first embodiment (display system 100) to the fourth embodiment (display system 100c). The display system 100d may be configured in combination with the functional units of the second embodiment (display system 100a) to the fourth embodiment (display system 100c).

[Sixth embodiment]
FIG. 9 is a system configuration diagram showing the system configuration of the sixth embodiment (display system 100e) of the display system. The same functional parts as those in the fifth embodiment are denoted by the same reference numerals as those in FIG. 8 in FIG.
The display system 100e includes a transmission device 10e and a display device 20e. The transmission device 10e differs from the transmission device 10d of the fifth embodiment in that it includes a first communication control unit 105e instead of the first communication control unit 105, and further includes a first non-display information processing unit 109. The configuration is the same. The display device 20e includes the second communication control unit 204e instead of the second communication control unit 204, and further includes a second non-display information processing unit 211 and a non-display information storage unit 212. Unlike the device 20d, other configurations are the same.

The first non-display information processing unit 109 generates information (hereinafter referred to as “non-display information”) that is not used for display control in the display device 20e, and outputs the information to the first communication control unit 105e. Information included in the non-display information may be determined by a functional unit of the transmission device 10e, or may be determined by an external device (for example, a management server 50 described later) connected to the transmission device 10e. In addition, the first non-display information processing unit 109 may generate non-display information based on information representing display contents.
The first communication control unit 105 e transmits not only the display information output from the display information generation unit 104 but also the non-display information output from the first non-display information processing unit 109 via the second antenna 102. The first communication control unit 105e transmits display information and non-display information using the same protocol.

The second communication control unit 204 e receives not only display information but also non-display information via the fourth antenna 202. The second communication control unit 204e outputs the received display information to the display control unit 205, and outputs the received non-display information to the second non-display information processing unit 211.
The second non-display information processing unit 211 performs processing related to the received non-display information. For example, the second non-display information processing unit 211 writes the received non-display information in the non-display information storage unit 212.

  The non-display information storage unit 212 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The non-display information storage unit 212 stores non-display information written by the second non-display information processing unit 211.

  FIG. 10 is a sequence diagram showing an operation flow of the sixth embodiment (display system 100e) of the display system. 10, the same processes as those in the fourth embodiment (display system 100c) are denoted by the same reference numerals as those in FIG. A description of the same processing as in the fourth embodiment is omitted.

  The first non-display information processing unit 109 of the transmission device 10e generates non-display information (Step S18). The first communication control unit 105e generates a wireless signal by performing encoding processing and modulation processing on the non-display information, and transmits the wireless signal from the second antenna 102 (step S19). The second communication control unit 204e of the display device 20e receives the radio signal via the fourth antenna 202, and restores the non-display information by performing demodulation processing and decoding processing on the radio signal (step S28). . The second non-display control unit 211 records the restored non-display information in the non-display information storage unit 212 (step S29).

  In the sixth embodiment (display system 100e) of the display system configured as described above, it is possible to transmit and record non-display information from the transmission device 10e to the display device 20e by the first communication control unit 105e. For example, information equivalent to the information displayed on the display unit 206 of the display device 20e can be recorded as non-display information in the non-display information storage unit 212, and the display content can be synchronized with the recorded content. Become.

<Modification>
In FIG. 10, the order in which the series of processes in steps S12, S13, and S22 to S24 and the series of processes in steps S18, S19, S28, and S29 are executed may be interchanged. Moreover, display information and non-display information may be communicated in parallel. The sequence of steps 15, S 26, S 27, S 16, S 17 and the sequence of steps S 18, S 19, S 28, S 29 may be interchanged.
The display system 100e may be modified and configured similarly to the first embodiment (display system 100) to the fifth embodiment (display system 100d). The display system 100e may be configured in combination with the functional units of the second embodiment (display system 100a) to the fifth embodiment (display system 100d).

[Application example]
FIG. 11 is a diagram showing an outline of a process management system 200 to which the above display system is applied. In the following description, among the above display systems, the process management system 200 when the sixth embodiment (display system 100e) is applied will be described.
In the process management system 200, a management server 50 is installed. The management server 50 collects information related to the manufacturing process of the manufactured product that is the management target in the process management system 200.

  In the process management system 200, the belt conveyor 30 that moves along the process line is installed, and the manufactured products 40 are arranged on the belt conveyor 30 at intervals. The manufactured product 40 is a product in the manufacturing process of a product manufactured in the process management system 200. A display device 20 e is arranged on the belt conveyor 30 together with the manufactured product 40. In the example of FIG. 11, the display device 20 e is disposed on the upper surface of the manufactured product 40. If the manufactured product 40 and the display device 20e are arranged in association with each other, it is not always necessary to arrange as shown in FIG. Further, one display device 20e may be associated with a plurality of manufactured products 40. In the management server 50, terminal identification information of the display device 20e and information related to the manufactured product 40 are registered in advance in association with each other.

  A plurality of work places for performing a plurality of processes are provided along the belt conveyor 30. A transmitter 10e is installed in the work place of each process. Each transmitter 10e is set with identification information (hereinafter referred to as “process identification information”) representing a process performed in the workplace where the transmitter 10e is installed. As the process identification information, transmission apparatus identification information set in advance for the transmission apparatus 10e may be used. A person who performs work at each work place (hereinafter, referred to as “worker”) performs the work of the process assigned to the work place with respect to the manufactured product 40 that has flowed on the belt conveyor 30. The worker causes the display device 20e associated with the manufactured product 40 that has finished the work to communicate with the transmission device 10e installed in the work place. For example, communication between the transmission device 10e and the display device 20e may be performed by placing the display device 20e on the upper surface of the transmission device 10e.

  FIG. 12 is a sequence diagram illustrating an example of a communication flow in the process management system 200. In addition, in order to show the flow of communication in FIG. 12, illustration is abbreviate | omitted about transmission of electric power. The third communication control unit 106d of the transmission device 10e continuously transmits a request signal (step S201). When the fourth communication control unit 208d of the display device 20e receives the request signal (step S301), the fourth communication control unit 208d transmits the transmission data including the terminal identification information generated by the second identification information processing unit 209 (step S302). The third communication control unit 106d of the transmission device 10e receives a transmission data signal including the terminal identification information (step S202). The first identification information processing unit 107 transmits the received terminal identification information and process identification information assigned to the own apparatus to the management server 50 (step S203). The management server 50 records the terminal identification information and the process identification information received from the transmission device 10e as a log representing process information (step S102).

  After recording the log, the management server 50 transmits the reception confirmation information to the transmission device 10e (step S103). The reception confirmation information is information indicating that the management server 50 has successfully received and recorded the terminal identification information and the process identification information from the transmission device 10e. When receiving the reception confirmation information from the management server 50 (step S204), the first identification information processing unit 107 notifies the first non-display information processing unit 109 and the display information generation unit 104 to that effect.

  When reception confirmation information is received from the management server 50 (step S204), the first non-display information processing unit 109 of the transmission device 10e generates process management information. Then, the first communication control unit 105e transmits process management information data via the second antenna 102 (step S205). The process management information is an example of non-display information, and is information related to the process of the manufactured product 40 associated with the display device 20e. The process management information represents, for example, the product name of the manufactured product 40, the lot number, the date and time when the work was last performed, the process of the work performed, and the like. The specific value of the date and time when the work was last performed may be, for example, the date and time when the process of step S202 was performed, the date and time when the process of step S203 was performed, or the process of step S101 was performed. It may be a date and time, or any other date and time that is acceptable in the process management system 200. When receiving the process management information (step S303), the second communication control unit 204e of the display device 20e outputs the process management information to the second non-display information processing unit 211. The second non-display information processing unit 211 records the received process management information in the non-display information storage unit 212 (step S304).

  In response to receiving the reception confirmation information from the management server 50, the display information generation unit 104 of the transmission device 10e generates process management display information. And the 1st communication control part 105e transmits the data of process management display information via the 2nd antenna 102 (Step S206). The process management display information is an example of display information, and is information for displaying information related to the process of the manufactured product 40 associated with the display device 20e. When receiving the process management display information (step S305), the second communication control unit 204e of the display device 20e outputs the process management display information to the display control unit 205. The display control unit 205 updates the display on the display unit 206 according to the process management display information (step S306).

  13 and 14 are diagrams illustrating examples of screens displayed on the display unit 206 of the display device 20e in the process management system 200. The screen shown in FIG. 13 is a screen at the time when the work of the first process is completed. The screen shown in FIG. 14 is a screen at the time when the work of the second process is completed.

  The display unit 206 of the display device 20e displays information related to the process of the manufactured product 40 associated with the display device 20e. Specifically, for example, the product name 601 of the manufactured product 40, the lot number 602, the barcode 603 indicating the terminal identification information assigned to the display device 20e, the date and time when the work was last performed (last work date and time) 604, Information on the process performed (processed process information) 605 and the like are displayed on the display unit 206. Specific values of the final work date and time are as described above. That is, for example, the date / time when the process of step S202 in FIG. 12 is performed, the date / time when the process of step S203 is performed, the date / time when the process of step S101 is performed, or the process management system 200 Other dates may be used as long as they are acceptable. The barcode 603 may represent process management information recorded on the display device 20e, not terminal identification information.

  When the manufactured product 40 placed on the belt conveyor 30 reaches the work place of the first process, the worker arranged in the work place performs the work related to the first process on the manufactured product 40. When the work related to the first process is completed, the worker causes the display device 20e associated with the manufactured product 40 to communicate with the transmission device 10e associated with the first process. In this communication, processing as shown in FIG. 12 is performed. By this processing, the process identification information of the first process and the terminal identification information of the display device 20e are recorded in the management server 50 in association with each other as a log. In addition, process management information indicating that the work of the first process is completed is recorded in the non-display information storage unit 212 of the display device 20e. In addition, process management display information for displaying performed process information 605 indicating that the work of the first process is completed is displayed on the display unit 206 of the display device 20e. For example, as shown in FIG. 13, among the rectangles associated with the numbers 1 to 12, the work of the step has been completed within the rectangle associated with the number 1 representing the first step. A check mark indicating is displayed. The process management display information includes the last work date and time, and the last work date and time display position 604 of the display unit 206 displays the value of the last work date and time.

  When the first operation is completed, the manufactured product 40 placed again on the belt conveyor 30 reaches the work place of the second step. The worker arranged at the work place in the second process performs work related to the second process on the manufactured product 40. When the work related to the second step is completed, the worker causes the display device 20e associated with the manufactured product 40 to communicate with the transmission device 10e associated with the second step. In this communication, processing as shown in FIG. 12 is performed. Through this process, the process identification information of the second process and the terminal identification information of the display device 20e are recorded in the management server 50 in association with each other as a log. In addition, process management information indicating that the work of the second process is completed is recorded in the non-display information storage unit 212 of the display device 20e. Further, process management display information for displaying the performed process information 605 indicating that the work of the second process is completed is displayed on the display unit 206 of the display device 20e. For example, as shown in FIG. 14, among the rectangles associated with the numbers 1 to 12, the inside of the rectangle associated with the number 1 representing the first step and the number 2 representing the second step A check mark indicating that the operation of the process is completed is displayed on both sides of the rectangle associated with the number. The process management display information includes the last work date and time, and the last work date and time display position 604 of the display unit 206 displays the value of the last work date and time related to the second process.

  In the process management system 200 configured as described above, the display contents on the display unit 206 of the display device 20e, the contents of the process management information recorded in the non-display information storage unit 212 of the display device 20e, and the management server 50 Synchronize with the recorded log contents. Therefore, even if any information is referred to, it is possible to obtain accurate information about the process of the manufactured product 40. For example, the operator can easily obtain accurate information about the process by visually recognizing the content displayed on the display unit 206. A person who can access the management server 50 through a network or direct operation can easily obtain accurate information about the process by checking the log. When information recorded in the non-display information storage unit 212 is displayed as a barcode 603, accurate information about the process can be easily input to the device by using a device such as a barcode reader. It becomes possible. As described above, the process management system 200 can easily obtain accurate information about a process by various means.

  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 100 ... Display system, 200 ... Process management system, 10 ... Transmitting device, 20 ... Display device, 101 ... First antenna, 102 ... Second antenna, 103 ... Feeding unit, 104 ... Display information generation unit, 105 ... First communication Control unit, 106 ... third communication control unit, 107 ... first identification information processing unit, 108 ... fifth antenna, 109 ... first non-display information processing unit, 201 ... third antenna, 202 ... fourth antenna, 203 ... Power supply unit, 204 ... second communication control unit, 205 ... display control unit, 206 ... display unit, 207 ... display data storage unit, 2031 ... power storage unit, 208 ... fourth communication control unit, 209 ... second identification information processing , 210 ... sixth antenna, 211 ... second non-display information processing part, 212 ... non-display information storage part, 30 ... belt conveyor, 40 ... manufactured product, 5 ... management server, 601 ... product name, 602 ... lot number, 603 ... bar code, 604 ... final work date and time, 605 ... Performed process information

Claims (8)

A display system comprising a transmission device and a display device,
The transmitter is
The first antenna,
A second antenna,
A power feeding unit that wirelessly transmits power to the display device via the first antenna;
A first communication control unit that wirelessly transmits display information to the display device via the second antenna;
With
The display device
A third antenna,
A fourth antenna,
A display unit for displaying, and
A second communication control unit that wirelessly receives display information from the transmission device via the fourth antenna;
A display control unit that controls display of the display unit according to display information received by the second communication control unit;
A power supply unit that wirelessly receives power from the transmission device via the third antenna and supplies power to the display unit, the second communication control unit, and the display control unit;
A display system comprising:   The display system according to claim 1, wherein a frequency of the electromagnetic wave output from the first antenna is different from a frequency of the electromagnetic wave output from the second antenna.   The display system according to claim 2, wherein the frequency of the electromagnetic wave output from the second antenna is higher than the frequency of the electromagnetic wave output from the first antenna. The transmission device further includes a third communication control unit that performs wireless communication with a communication method different from the first communication control unit,
The display device further includes a fourth communication control unit that performs wireless communication with a communication method different from that of the second communication control unit,
The display system according to claim 1, wherein the third communication control unit receives terminal identification information previously given to the display device from the fourth communication control unit. The transmitter further includes a fifth antenna,
The display device further includes a sixth antenna,
The third communication control unit performs wireless communication with the display device via the fifth antenna,
The display system according to claim 4, wherein the fourth communication control unit performs wireless communication with the transmission device via the sixth antenna. The display device further includes a power storage unit that stores electric power,
The display system according to claim 1, wherein the power supply unit stores part or all of the power received from the transmission device via the third antenna in the power storage unit. A transmission device that wirelessly communicates with a display device that performs display according to display information,
The first antenna,
A second antenna,
A power feeding unit that wirelessly transmits power for operating the display device to the display device via the first antenna;
A first communication control unit that wirelessly transmits display information to the display device via the second antenna;
A transmission apparatus comprising: A display device that wirelessly communicates with a transmission device that wirelessly transmits power via a first antenna and wirelessly transmits display information via a second antenna,
A third antenna,
A fourth antenna,
A display unit for displaying, and
A communication control unit that wirelessly receives display information from the transmission device via the fourth antenna;
A display control unit that controls display of the display unit according to display information received by the communication control unit;
A power supply unit that wirelessly receives power from the transmission device via the third antenna and supplies power to the display unit, the communication control unit, and the display control unit;
A display device comprising:

Images