JP2007047512A - Display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive display system for easily finding a desired stored body among many stored bodies (retrieved bodies) stored in a storage shelf with a simple configuration. <P>SOLUTION: A mat 1 having a mat antenna 10 is mounted on a shelf plate 51 of the storage shelf 5 and many files 6 are stored thereupon while display units 2 each equipped with a display unit antenna 20 and a memory display part 21 are fitted on the fronts (outside spines). Consequently, the respective display units 2 are arranged vertically to the mat 1 and signals are communicated between a mat antenna 10 and a display unit antenna 20 to change the display state of only the memory display part 21 of a display unit 2 fitted to a desired file. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display system suitable for displaying a required member among a plurality of members arranged upright on a plane, and in particular, a plurality of files stored in each shelf of a storage shelf having a plurality of shelves. The present invention relates to a display system that is convenient for finding necessary items from stored items such as medical records, books, parts of the same or similar shape, and goods (for sale or rental).

  For example, when storing a large number of members (contained items) of approximately the same shape, such as files for documents, library books, medical charts, etc., each item is usually classified into a storage shelf such as a rack. , Numbered and organized and stored. Then, searching for a necessary item from among the large number of stored items and returning it to the original storage position after use has been performed manually, depending on the classification and number.

However, when the number of items to be stored became very large, it was difficult and time-consuming to find the necessary items by relying on such classifications and numbers. In addition, if the position where the taken-out item is returned after use is wrong, there is a problem that it is very difficult to find it next.
Therefore, as can be seen from, for example, Patent Document 1, when it is desired to individually retrieve necessary search objects from a large number of stored search objects (stored items) such as medical charts, it can be easily and quickly extracted. There has been proposed an individual search apparatus for searching objects.
JP-A-1-98067

This search object individual search device is provided with a large number of oscillators that oscillate a digital signal at equal intervals on the top plate of each shelf of a storage shelf for storing a search object such as a medical chart. Each is equipped with a receiver comprising a receiver and a display (light emitting diode), and each oscillator is connected to a computer.
When it is desired to take out a search target object from the shelf, the computer selects the search target object and transmits a digital signal corresponding to the unique address to each oscillator. Then, each oscillator receives the digital signal, and first oscillates a reception preliminary signal to each receiving device, and then oscillates a digital signal corresponding to the unique address.

As a result, the receiver of the receiver attached to each object to be searched is ready to receive a digital signal when it receives the preliminary reception signal from any of the oscillators, and then oscillates from the oscillator. Only the receiver of the receiving apparatus in which the unique address by the digital signal is stored responds to reception, and the light emitting diode of the display is turned on.
By illuminating, it is possible to easily know the location of the search object that is necessary, and it is sufficient to take out the search object whose display is lit. The unique address in the receiving device is stored by a dip switch.

  According to this apparatus, even if the position to return the search target to the shelf after using it is wrong, when the search target is searched, the unique address stored in the receiving apparatus and the digital signal oscillated from the oscillator Since the receiver matches the unique address and turns on the display in response to the reception, it is possible to easily know the location.

  However, such a conventional individual search device for search objects requires a large number of oscillators (systems) since it is necessary to install a large number of oscillators at equal intervals on each shelf of the storage shelf for storing the search objects. It was expensive. Moreover, it was difficult to carry out easily using an existing storage shelf. Furthermore, the receiving device attached to each search object has a high power consumption because it has to keep the display lighted until the search object is taken out when it is searched, and a battery is incorporated as its power source. ing. For this reason, when the battery is exhausted, the operation is stopped, so that the maintenance work is difficult, and it is difficult to make the receiving device into a card.

  The present invention has been made to solve such problems, and has a simple and inexpensive configuration for easily finding a desired item from a large number of stored items (searched items) stored in a storage shelf. It is an object of the present invention to provide a simple display system so that it can be easily implemented even when an existing storage shelf is used. It is another object of the present invention to eliminate the need for a battery on the search object side, eliminate the need for maintenance work such as battery replacement, and reduce the thickness and form a card.

In order to achieve the above object, a display system according to the present invention includes a mat including a mat antenna, and a display including a display antenna and a memory display unit. And arranged in the vertical direction so as to communicate signals between the mat antenna and the display antenna.
The mat antenna is a coil arranged in a planar shape inside the mat, the coil generates a magnetic field in a plane perpendicular to the mat, and the display antenna includes the display It is preferable that the coil is disposed in a flat shape inside the magnetic field, and the coil is disposed in a magnetic field generated in a plane perpendicular to the mat.

The memory display portion of the display device may be a display member using an electrophoretic display element.
Electric power for driving the display can be supplied from the mat antenna of the mat via the display antenna by electromagnetic induction.
A plurality of the display units are arranged on the mat, and signals including address information are transmitted from the mat antenna to the plurality of display units. The plurality of display units receive the signals, and the plurality of display units. Of the display units, only the display unit in which the address information address in the received signal matches the own address may be configured to send a display signal to the own memory display unit.
Further, the mat may be arranged on each shelf in a storage shelf having a plurality of shelves, and the display unit may be arranged on the front surface of the stored items stored in the respective shelves.

  Since the display system according to the present invention is simple in configuration and does not require a special installation space, it can be easily implemented using an existing storage shelf. Further, since the display unit of the display attached to each search object is a memory display part, the display state is maintained even after the search object is taken out. Since the power consumption is extremely low, it is not necessary to incorporate a battery as a power source, and driving power can be supplied from the mat antenna via the display antenna by electromagnetic induction. By doing so, maintenance work such as battery replacement becomes unnecessary, and since the battery is unnecessary, the thickness can be reduced. Further, the display unit can be made into a card by making the circuit portion an IC.

Hereinafter, the best mode for carrying out the present invention will be specifically described with reference to the drawings.
An embodiment of a display system according to the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a schematic configuration of an embodiment of the display system together with a block diagram of a transmission / reception unit. FIG. 2 is a block diagram showing the structure of the display.
This display system includes a mat 1 and a display 2. The mat 1 is formed of an insulating sheet made of resin or the like, and has a length of 200 to 500 mm × width of 600 to 1800 mm × thickness of 5 to 10 mm according to a shelf to be installed, and includes a mat antenna 10 therein.

The display 2 includes a display antenna 20 inside, and a memory display unit 21 so that the display 2 can be seen from the outside. The indicator 2 has a thickness of 2 to 3 mm, is formed in a card size, and is arranged in a direction perpendicular to the mat 1. Communication between the mat antenna 10 and the display antenna 20 is possible.
As shown in FIG. 3, the mat antenna 10 is a coil arranged in a planar shape inside the mat 1, and when a current is passed through the coil in the direction indicated by the arrow, the mat antenna 1 is shown in FIG. A magnetic field is generated so that the magnetic field lines are indicated by broken lines in a plane perpendicular to the plane. Such a magnetic field distribution occurs in a range indicated generally by A in FIG.

On the other hand, the display antenna 20 is also a coil arranged in a plane in the display 2 as shown in FIG. In FIG. 2, a solid line is shown for easy understanding, but in practice, a conductive pattern such as copper or carbon is formed inside the card-like display 2. As shown in FIG. 4, the display antenna 20 using the coil is arranged vertically in a region B surrounded by a one-dot chain line in a magnetic field generated in a plane perpendicular to the mat 1. A magnetic field is also generated around the coil near both short sides of the mat 1, but it is not used.
By arranging the mat antenna 10 and the display antenna 20 in this way, signals can be efficiently communicated between the two antennas. In addition, power can be sent from the mat 1 to the display 2 by electromagnetic induction between the antennas.

  For the communication, a transmission unit 3 is provided on the mat 1 side. As shown in FIG. 1, the transmission unit 3 has a flat rectangular parallelepiped case 30 on the shelf 51 at the end of the storage shelf 5 in the same manner as the file 6, and has a pilot lamp 31 on the front thereof. Provided. Inside the case 30, a power supply circuit 33 and a transmission circuit 36 are provided. The transmission circuit 36 is connected to the personal computer 8 by a cable 18 by wire.

  The power supply circuit 33 is supplied with AC 100V from a commercial power supply via a plug and a power cord, and converts it into a predetermined DC voltage by stepping down, rectifying, smoothing, etc., and via a power supply line 39 indicated by a broken line in FIG. To supply power to the transmission circuit 36. When the power supply circuit 33 is operating, the pilot lamp 31 is turned on to display it.

  The transmission circuit 36 includes an oscillation circuit, a modulation circuit, and the like. When a search start signal including address information is input from the personal computer 8 to the transmission circuit 36, for example, a constant amplitude of about 100 to 200 KHz oscillated by the oscillation circuit. The high-frequency signal is frequency-modulated (FM-modulated) according to the address information, and a signal including the address information based on the binary signal as shown in FIG. 8 is transmitted to the mat antenna 10 through the terminals 11 and 12 shown in FIG. To do. As a result, a high-frequency current flows alternately in the direction of the arrow and in the opposite direction to the coil that is the mat antenna 10, and the magnetic field shown in FIG. 4 is generated.

On the other hand, as shown in FIG. 2, the display 2 is provided with a rectifier circuit 22, a receiving circuit 23, a comparator 24, an address switch 25, and a display unit driving circuit 26.
The rectifying circuit 22 and the receiving circuit 23 are connected to both terminals of the display antenna 20. The rectifier circuit 22 rectifies and smoothes the high-frequency current generated by the electromagnetic induction in the display antenna 20 by the magnetic field generated by the mat antenna 10, and generates the required voltage power. Power is supplied to each part through the power supply line 27 shown. Therefore, it is not necessary to provide a battery for the indicator 2.

  The receiving circuit 23 demodulates the signal received from the mat antenna 10 to detect address information based on the binary signal and sends it to the comparator 24. The comparator 24 compares the address of the address information with its own address set by the address switch 25 constituted by a dip switch or the like, and sends a display signal to the display unit driving circuit 26 only when it matches. Accordingly, the display unit driving circuit 26 operates to apply a predetermined voltage to the memory display unit 21 to change the display state. For example, the white display state is changed to the black display state. A display example after the memory display unit 21 is changed is shown in FIG. A simple square or round shape may be used, but by displaying the electrode pattern 216 of the memory display 21 as “searching” in advance, the characters “searching” are displayed or deleted. I can do things.

When the voltage is applied, the memory display unit 21 changes the display state according to the applied polarity, and maintains the display state even when the voltage is not applied thereafter.
As the memory display 21, a display member using an electrophoretic display element can be used. This is an application of a known electrophoretic display device as disclosed in, for example, Japanese Patent Application Laid-Open Nos. 2000-66249 and 2005-156759.

FIG. 5 is a schematic cross-sectional view of a display module which is a display member using the electrophoretic display element, and FIG. 6 is an enlarged explanatory view of the electrophoretic display element.
In the display module 210 shown in FIG. 5, a transparent electrode 212 made of an ITO (indium tin oxide) film is formed on the entire back surface of a transparent resin substrate 211, and a microcapsule display layer 213, also referred to as electronic ink, is formed thereon. It is formed into a film. The film is adhered to a printed circuit board 215 having an electrode pattern 216 for each pixel formed on the surface by an adhesive layer 214.

  In the microcapsule display layer 213, a large number of microcapsules 220 having a diameter of about several tens of μm are dispersed in a mixture of a binder, a surfactant, a thickener, pure water, and the like. As shown in FIG. 6, the microcapsule 220 has white particles 223 made of titanium oxide or the like and black particles 224 made of carbon black or the like in a capsule shell 221 made of transparent methacrylic resin or the like. It is enclosed in a state of being dispersed in a transparent dispersion medium 222 having a high viscosity. The white particles 223 are positively charged and the black particles 224 are negatively charged.

  Therefore, among the electrodes arranged so as to sandwich the microcapsule display layer 213, one part of the whole transparent electrode 212 is grounded, and a positive voltage is applied to the electrode pattern 216 on the other printed circuit board 215. The positively charged white particles 223 in the microcapsule 220 move to the transparent electrode 212 side, and the negatively charged black particles 224 move to the electrode pattern 216 side, so that they appear white when viewed from the viewing side (upper side in FIG. 6). On the other hand, in the portion where a negative voltage is applied to the electrode pattern 216, the negatively charged black particles 224 in the microcapsule 220 move to the transparent electrode 212 side, and the positively charged white particles 223 move to the electrode pattern 216 side. It looks black when viewed from the viewer side.

  As in the central microcapsule 220 in FIG. 6, in the microcapsule 220 at a position straddling the electrode pattern to which a positive voltage is applied and the electrode pattern to which a negative voltage is applied, a part of the white particles 223 is a transparent electrode. Since the remaining part moves to the electrode pattern 216 side, a part of the black particles 224 moves to the electrode pattern 216 side, and the remaining part moves to the transparent electrode 212 side, the finer display is possible than the diameter of the microcapsule. Is possible.

Further, by adjusting the applied voltage and the application time, and maintaining the black particles 224 and the white particles 223 mixed in the middle, a gray-scale display such as gray is also possible.
Therefore, the display state can be changed to white, black, or gray depending on the polarity of the voltage applied between the transparent electrode 212 and the electrode pattern 216. At this time, the white particles 223 and the black particles 224 move in the dispersion medium 222 by electrophoresis. However, since the dispersion medium 222 has a high viscosity, the display state is changed by applying a voltage, and then the application of the voltage is stopped. However, it has a memory effect that maintains its display state.

  For this reason, this electrophoretic display element is shorter than the LED light emitting element as well as an ordinary liquid crystal display because it only takes a time for changing the display to apply the driving voltage, and the power consumption is reduced. There is very little. In particular, if the display state of the memory 2 of the display device 2 according to the present invention is changed once during the search of the search object, it is necessary to change the display state until the search object is returned after the search object is returned. This display module 210 is optimal. That is, it is sufficient for the transmission circuit 36 that requires a very large amount of power to operate for only a few seconds.

  Instead of the printed circuit board 215 of the display module 210, a TFT back plate in which a large number of pixel electrodes and thin film transistors that switch current for each pixel electrode are formed on an insulating plate may be used. By changing the black particles 224 in the microcapsules 220 to red particles, blue particles, green particles, or the like, a display state of red, blue, green, or the like can be obtained. Further, if the display state of the memory display unit 21 is only a single display as shown in FIG. 9, the electrode pattern 216 may be a single electrode on the entire surface, so that the configuration is simpler and less expensive.

The display module 210 not only has an extremely low power consumption as described above, but also has a high contrast when displaying two colors, with white display being close to white of paper with high reflectivity in terms of visibility. There are advantages such as an extremely large angle (close to 180 °) and no flicker. In addition, it is thin and light, flexible and not cracked.
In addition, a memory-type liquid crystal panel using ferroelectric liquid crystal or cholesteric liquid crystal can also be used for the memory-type display unit 21 in the same manner. In addition, an electropowder fluid element in which charged white and black particles are sealed without liquid between two substrates provided with a partition wall can also be used. An electrochromic element can also be used.

In order to use the display system described above, the mat 1 is spread and fixed with double-sided tape or the like over substantially the entire surface of the shelf 51 of the storage shelf 5 shown in FIG. Then, the transmission unit 3 connected to the mat antenna 10 in the mat 1 is placed in the vicinity of one end on the shelf 51 and the plug 37 is inserted into a commercial power outlet.
Attach the display 2 to the front of each file 6 that is the stored item (searched item) stored in the storage shelf 5, that is, the outside of the back cover, or insert it into a transparent cover part for inserting title paper. Hold. Each file 6 is stood and stored on a mat 1 on a predetermined shelf. In the initial state, the display state of the memory display 21 of each display device 2 is all set to a white display state.

Since the storage shelf 5 is usually provided with a plurality of shelf steps, the mat 1 is laid and fixed on each shelf plate 51, and each mat is connected in parallel to the terminal of the transmission circuit 36 of the transmission unit 3. To do. Then, the file 6 is stored on the mat 1 of each shelf. Therefore, one transmission unit 3 may be provided in one storage shelf 5.
The address switch 25 shown in FIG. 2 of each display 2 is set in advance with a unique address of a file to which it is attached.

  When searching for any of the files stored in the storage shelf 5, it is confirmed by turning on the pilot lamp that the power is supplied to the transmission unit 3, and the name of the book or the book number to be searched for is retrieved to the personal computer 8. When input, the address information associated with the book name is sent to the transmission unit 3. Then, the transmission unit 3 causes the transmission circuit 36 to transmit a signal including the address information for only a few seconds.

As a result, a high-frequency current flows through the coil that is the mat antenna 10 in the mat 1 placed on each shelf plate 51 as described above, and the magnetic field shown in FIG. 4 is generated.
Then, the display antenna 20 of the display 2 attached to each file 6 accommodated on the mat 1 receives it and induces an alternating current by electromagnetic induction, and the rectifier circuit 22 shown in FIG. However, as described above, the electric power of the required voltage is generated, so that each part in the display 2 is in an operating state.

  The signal received by the receiving circuit 23 is demodulated to detect address information, and the comparator 24 displays the display unit driving circuit 26 only when the address of the address information matches its own address set by the address switch 25. Send display signal to. As a result, the display unit driving circuit 26 applies a voltage having a predetermined polarity to the memory type display unit 21 to bring the memory type display unit 21 into a black display state.

Note that the display device 2 in which the address of the received address information does not match its own address does nothing. Therefore, the display state of the memory display unit 21 remains entirely white.
The display state at this time is, for example, as shown in FIG. 7, and only the memory display portion 21 of the display device 2 attached to the fifth file 6 from the right is in a black display state. Can immediately recognize that the file 6 is a search target. Even after the file 6 is taken out from the storage shelf 5, the memory display 21 remains in a black display state.

  When the file 6 is returned to the storage shelf 5, for example, when the transmission unit 3 is not searched, a signal for setting the display state of the memory display unit 21 to the white display state is displayed on all the display devices 2 regardless of the address information. Thus, the display unit drive circuits 26 of all the display devices 2 apply to the memory display unit 21 a voltage having a polarity for making a white display state for a short time. Therefore, the memory display unit 21 that has remained in the black display state also returns to the white display state.

Alternatively, when the user returns the file 6 to the storage shelf 5 and presses a reset switch (not shown) provided separately in the transmission unit 3, the transmission unit 3 immediately resets all the display units to white. A signal may be transmitted, and the memory property display unit 21 of the returned file 6 may be in a white display state.
When the retrieved file 6 is returned to the storage shelf 5, the next search is not hindered because the search is performed based on the address information without necessarily returning to the original position.

  In the above example, the memory display 21 of the display device 2 attached to the searched file is set to the black display state. However, the memory display 21 is changed to other colors such as red and green. The color can be displayed, and when it is searched, the color can be made more conspicuous such as the display state of red on the entire surface, so that it can be found more easily. Or it can also make it easier to find by providing a large capacitor inside, storing electric power, and blinking for several tens of seconds.

  Furthermore, in the above-described example, the description has been made with one storage shelf for the sake of simplicity. However, even in the case of a plurality of storage shelves, searching can be performed in the same manner by installing one transmission unit in each storage shelf. Is possible. In this case, if all the transmission units are operated at the same time, a large amount of power is temporarily required. Therefore, it is preferable to operate the transmission units in order at intervals of several seconds.

Next, another embodiment of the present invention will be described with reference to FIGS.
10 is a perspective view showing a schematic configuration of an embodiment using a personal computer of the display system according to the present invention, FIG. 11 is a block diagram showing a circuit configuration of the transmission / reception unit 4 in FIG. 10, and FIG. It is a block diagram which shows the circuit structure of the indicator 9 in. In these drawings, portions corresponding to those in FIGS. 1 to 9 in the embodiment described above are denoted by the same reference numerals.
This embodiment differs from the above-described embodiment in that there are a plurality of storage shelves, and one transmission / reception unit 4 is installed for each of the storage shelves 5A, 5B, and each of the transmission / reception units 4 communicates with the personal computer 8 by radio communication. Further, the display 9 has a transmission / reception function, can perform bidirectional communication with the transmission / reception unit 4, and has a complicated display unit driving circuit, so that numbers and characters can be displayed. .

  The storage shelves 5A and 5B each have six storage stages. However, the storage shelves 5A and 5B may have any number of storage shelves and any number of storage shelves. Then, the mat 1 is placed and fixed on substantially the entire surface of each shelf board 51 (the bottom stage also serves as a base). Then, the mat antennas 10 by the coils shown in FIG. 3 in the mats 1 of the respective stages are connected in parallel by the signal lines 48 for each of the storage shelves 5A and 5B and connected to the transmission / reception unit 4. In the example shown in FIG. 10, each transmission / reception unit 4 is installed at the uppermost right end of the storage shelves 5A and 5B. A power cord 49 and a transmission / reception unit antenna 7 are connected to each transmission / reception unit 4.

As shown in FIG. 13, the indicator 9 attached to the front surface (outside of the back cover) of the files stored in the respective shelves of the storage shelves 5A and 5B includes a rectifier circuit 92, a transmission / reception circuit 93, a CPU, and the like. A microcomputer (hereinafter abbreviated as CPU) 94, an address memory 95, and a display unit driving circuit 96 are provided as an IC.
The rectifier circuit 92 and the transmission / reception circuit 93 are connected to both terminals of the display antenna 90. The rectifier circuit 92 rectifies and smoothes the high-frequency current generated by the electromagnetic induction in the display antenna 90 by the magnetic field generated by the mat antenna 10, and generates the required voltage power. Power is supplied to each part through the power supply line 97 shown. Therefore, it is not necessary to provide a battery for the indicator 9. Further, since the electric circuit is made into an IC, it is possible to make it a card type with a thickness of 1 mm or less.

The memory display unit 91 uses the electrophoretic display element described in FIG. 2, but the electrode pattern is finely divided and can display numbers and characters. Alternatively, graphic display can be performed by using a TFT substrate instead of the printed board.
The address memory 95 composed of a nonvolatile memory places the display device 9 on the IC card writer in advance and writes desired address information.

  The personal computer 8 shown in FIG. 10 stores the correlation information between a file name, a book name, and an address number in a nonvolatile memory such as a built-in hard disk. Then, as an initialization operation, all files are sequentially searched, and a response signal from the display unit 9 described later is received together with the address information (storage shelf number) of the transmission / reception unit 4 for each storage shelf. The address information of each stored file is stored. These address information can be changed by periodically performing a complete search in accordance with addition or removal of storage shelves, change of files stored in the storage shelves, addition or disposal.

  When searching for a file, when a desired book name or file number is input from the keyboard of the personal computer 8, the address information of the file corresponding to the book name or file number and the data to be displayed are, for example, center frequency 20 MHz. The signal is transmitted from the personal computer antenna 81 as a radio communication signal. In addition, by receiving a response signal from the transmission / reception unit 4, it is confirmed that the transmitted address information or the like has been reliably received by the designated transmission / reception unit 4, and that an error signal has been received. Thus, the transmitted address information can be confirmed, and if it is incorrect, it can be corrected and a signal including correct address information can be transmitted again.

The transmission / reception unit 4 is configured as shown in FIG. 11, and a display lamp 41 that is lit up brightly is provided on the front upper portion of the transmission / reception unit 4. In the transmission / reception unit 4, transmission / reception circuits 42 and 46, a microcomputer (CPU) 44, a memory 45, and a lamp lighting circuit 47 are provided.
The transmission / reception unit 4 is also provided with a power supply circuit and its power supply line similar to the power supply circuit 33 and its power supply line 39 of the transmission / reception unit 3 shown in FIG. 1, but they are not shown in FIG. ing.

  The transmission / reception circuit 42 is a circuit for wirelessly communicating with the personal computer 8 through the transmission / reception unit antenna 7 and also includes an oscillation circuit, a modulation circuit, a demodulation circuit, and the like. The memory 45 stores at least address information (storage shelf number) of a storage shelf in which the transmission / reception unit 4 is installed, and may also store address information of all files stored in the storage shelf. .

  The CPU 44 compares the address of the storage shelf with the address of its own storage shelf stored in the memory 45 among the address information included in the signal received by the transmission / reception circuit 42 from the personal computer 8, and the result matches. Only when the address of the address information file included in the signal received from the personal computer 8 is sent to the transmission / reception circuit 46, here, similar to the transmission circuit 36 of the previous embodiment, a binary signal indicating the address information. The frequency-modulated signal is generated and transmitted to the mat antenna 10.

  Also in this case, as shown in FIG. 8, a sinusoidal oscillation signal is modulated with a binary signal by FSK, but a signal for wired communication having a center frequency of about 100 to 200 KHz, for example. An example of a data format of a signal transmitted and received between the mat antenna 10 and the display antenna 90 is shown in FIG. In this figure, “AM” is a special pattern of address marks and indicates that the address continues thereafter. “Address” indicates the address of the file tag to be transmitted / received, and this includes address information of the storage shelf and the file to be searched. “DM” is a special pattern of data marks, and indicates that data continues thereafter. “Data” is transmission / reception data, and is used as necessary.

  The transmission / reception circuit 93 provided in the display unit 9 shown in FIG. 13 demodulates the signal received from the mat antenna 10 to detect address information based on a binary signal and sends it to the CPU 94. The CPU 94 compares the address of the address information with its own address stored in the address memory 95 which is a non-volatile memory, and sends a display signal to the display unit driving circuit 96 only when it matches. As a result, the display unit driving circuit 26 operates to apply a predetermined voltage to the memory display unit 91 to change its display state. At this time, the CPU 94 generates a response signal including its own address information, and the transmission / reception circuit 93 converts it into an FM modulation signal and transmits it to the mat antenna 10.

  The transmission / reception unit 4 that has received the response signal from the display unit 9 turns on the display lamp 41 to indicate that the file to be searched is in the storage shelf, and transmits information on the found search file from the transmission / reception circuit 42 to the personal computer 8. Can be confirmed on the screen of the personal computer 8. Thereby, even if there are a plurality of storage shelves 5A, 5B, etc., it is easier to find the search file by first finding a storage shelf whose display lamp 41 is lit.

  Since the display 9 attached to each file 6 can display numbers, the display state of the memory display unit 91 is changed only when the address of the address information received by the display 9 matches its own address. It is possible to change from white display to black display and to display a file number and a storage shelf number. An example of the display is shown in FIG. In FIG. 14, XXX is a storage shelf number, and XXX is a file number. Alternatively, other necessary information can be sent as a data signal to the display unit 9 and displayed on the memory display unit 91. For example, “copy prohibited” or “return deadline: ○ month ○ day” can be displayed.

  In the example shown in FIG. 10, the third file 6 from the right of the third shelf from the top of the storage shelf 5B is searched, and the memory property display portion 91 of the display device 9 attached thereto is in a black display state. Has changed. Further, since the display lamp 41 of the transmission / reception unit 4 installed in the storage shelf 5B is lit, the position of the file being searched can be easily understood.

The method for returning the display state of the memory display 91 of the display device 9 to the display state of white on the display 9 after returning the file 6 to the storage shelf is the same as in the above-described embodiment.
As mentioned above, although the Example at the time of using the display system by this invention for the search of a file has been demonstrated, it is not restricted to this, IC tag with a display using RF-ID, an electronic shelf label system, with a display Application to communication with an IC card is also possible.

  The display system according to the present invention is suitable for displaying a required member among a plurality of members arranged upright on a plane, and is particularly the same or stored in each shelf of a storage shelf having a plurality of shelves. Numerous items of similar shape, such as medical charts in hospitals, books in libraries and bookstores, video tapes and DVDs for rental or sales, various materials stored in a data room, various materials stored in a warehouse It can be used extensively to efficiently find necessary items from products and parts.

  Since this display system is simple in configuration and does not require a special installation space, it can be easily implemented using an existing storage shelf. And since the display part of the display attached to each search object is a memory display part, the display state is maintained even after the search object is taken out, so it is possible to display prohibited items and return deadlines etc. it can. Further, since power consumption is extremely low, it is not necessary to incorporate a battery as a power source, and driving power can be supplied from the mat antenna by electromagnetic induction. Thereby, maintenance work such as battery replacement becomes unnecessary. Further, the display unit can be made into a card by making the circuit portion an IC.

It is a perspective view which shows schematic structure of one Example of the display system by this invention with the block diagram of a transmission / reception unit. It is a block block diagram which shows the structure of the indicator in FIG. It is a top view which shows an example of the antenna for mats provided in the inside of the mat in FIG. It is a figure which shows the typical cross section which follows the XX line | wire of FIG. 3 with the magnetic field distribution.

It is typical sectional drawing of the display module using the electrophoretic display element used as a memory-type display part in FIG. It is an expansion explanatory view of the electrophoretic display element. It is a front view of a part of a storage shelf showing an example during a file search by the display system shown in FIG. It is a wave form diagram which shows the example of the digital signal by which FM modulation used for communication in the display system by this invention. It is a figure which shows the example of a display by the memory property display part.

It is a perspective view which shows schematic structure of the Example which uses the personal computer of the display system by this invention. It is a block diagram which shows the circuit structure of the transmission / reception unit in FIG. It is a figure which shows an example of the data format of the signal transmitted / received between the microcomputer and the transmission / reception unit in the display system by this invention. It is a block block diagram which shows the structure of the indicator in FIG. It is a figure which shows the example of a display by the memory property display part 91. FIG.

Explanation of symbols

1: Mat 2, 9: Display 3: Transmission unit 4: Transmission / reception unit
5, 5A, 5B: Storage shelves 6: Files (stored items, searched items)
7: Antenna for transmission / reception unit 8: Personal computer 10: Antenna for mat 18: Cable 20: Antenna for display 21: Memory display unit 22: Rectifier circuit 23: Reception circuit 24: Comparator 25: Address switch 26: Display unit drive circuit 27: Power supply line 30: Case 31: Pilot lamp 33: Power supply circuit 36: Transmission circuit 37: Plug 38: Power supply cord 39: Power supply line

41: Indicator lamp 42: Transmission / reception circuit 44: Microcomputer (CPU)
45: Memory 46: Transmission / reception circuit 47: Lamp lighting circuit 48: Signal line 49: Power cord 51: Shelf board 81: Personal computer antenna 90: Display antenna 91: Memory display unit 92: Rectifier circuit 93: Transmission / reception circuit 94: Microcomputer (CPU)
95: Address memory 96: Display unit drive circuit 97: Feed line 211: Resin base material 212: Transparent electrode 213: Microcapsule display layer 214: Adhesive layer 215: Printed circuit board 216: Electrode pattern 220: Microcapsule 221: Capsule shell 222: Dispersion medium 223: White particles 224: Black particles

Claims (6)

A mat provided with a mat antenna; a display provided with a display antenna and a memory display;
The indicator is disposed perpendicular to the mat;
A display system, wherein a signal is communicated between the mat antenna and the display antenna. The mat antenna is a coil arranged in a planar shape inside the mat,
The coil generates a magnetic field in a plane perpendicular to the mat;
The display antenna is a coil arranged in a planar shape inside the display, and the coil is arranged in a magnetic field generated in a plane perpendicular to the mat. Item 4. The display system according to Item 1.   The display system according to claim 1, wherein the memory-type display unit of the display is a display member using an electrophoretic display element.   4. The display system according to claim 1, wherein electric power for driving the display is supplied from the mat antenna of the mat via the display antenna by electromagnetic induction. 5. A plurality of the indicators are arranged on the mat,
A signal including address information is transmitted from the mat antenna to the plurality of indicators, the plurality of indicators receive the signal, and the address information in the received signal among the plurality of indicators. 5. The display system according to claim 1, wherein only the display device whose address matches the own address sends a display signal to the self-memory display unit. 6. The mat is disposed on each shelf in a storage shelf having a plurality of shelves,
The display system according to claim 5, wherein the display device is arranged on a front surface of an item stored in each shelf.

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