WO2008026285A1 - Display control device and its control method - Google Patents

Abstract

A display control device is provided with a display switching control unit for carrying out rewriting control of a plurality of rewritable display units that normally display default display contents, wherein the display switching control unit is comprised of a state judging unit for outputting a rewriting instruction signal for the display in response to changes in state, and a display contents storing unit for storing the default display contents and rewriting display contents, which are different from the default display contents, in accordance with a place where the display unit is set. The display switching control unit reads the rewriting display contents in accordance with the rewriting instruction signal from the state judging unit and rewrites the default display contents on the plurality of the display units.

Description

 Specification

 Display control apparatus and control method thereof

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to a display control device and a control method thereof, and more specifically, to a display control device and a control method thereof that can switch display contents according to a situation. Background art

 BACKGROUND ART [0002] Advertising posters and in-house display boards for user guidance and guidance, which are arranged indoors and outdoors, are conventionally known. This type of display medium requires a separate display board to display each of the display contents when different display contents or different display times are required. In addition, the display contents are changed and displayed using a mechanically or electrically variable display device. However, the variable display device is bulky because the device itself is bulky. Thus, unlike a poster or a display board, the installation location is limited.

 [0003] In recent years, the power of electronic paper has been put to practical use that combines the advantages of thin and easy-to-view! With the advantages of paper and the rewritable and resource-saving electronic display. Electronic paper displays digital information electronically on a thin paper-like display medium, and is also called a paper-like display. Electronic paper is different from transmissive LCD

Without using a knocklight, display is performed with reflected light in the same way as with paper. In addition, electronic paper generally saves power when the power is turned off, so it consumes power only when the screen is rewritten. There have been many proposals for electronic paper display methods such as electrophoresis and liquid crystal display.

 [0004] Unlike conventional display devices, electronic paper is thin and lightweight, so it can be placed in almost any place and only consumes power during rewriting. It has the potential to be widely used as a guide plate.

[0005] Recently, as a passenger guidance display system for guiding passengers, it has been proposed to guide the user by changing the contents of the guidance display up to the boarding position according to the place and time (Patent Document 1). reference). However, this uses a guidance display device installed in the station premises, expanding the possibility of general display or guidance using electronic paper, etc. Not like that.

 [0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-106742

 Disclosure of the invention

 Problems to be solved by the invention

[0007] The present invention provides a display control apparatus and a control method therefor that can effectively use rewritable display means and can give optimum information to the location of the display means depending on the situation. Objective.

 Means for solving the problem

[0008] In order to achieve the above object, a display control device according to an aspect of the present invention performs display switching for performing rewrite control on a plurality of rewritable display units that always display default display content. The display switching control unit stores a status determination unit that outputs a signal instructing rewriting of the display in response to a change in the status, the default display content, and the display unit is arranged A display content storage unit that stores a display content for rewriting that is different from the display content of the default screen according to the location where the display content is stored. Accumulation unit The display content for rewriting is read, and the default display content of the plurality of display units is rewritten. And

 [0009] Further, the display switching control unit further includes a display mode unit for designating a display mode of the display content, and when the display content is rewritten, the display unit is operated according to the display mode designated by the display mode unit. Can be displayed.

 [0010] Further, the display mode may be a simultaneous display mode in which the plurality of display units are simultaneously rewritten, the default display content is for advertising, and the rewriting display content is for evacuation guidance. It is preferable to have it.

 [0011] Further, the display mode may be a sequential display mode in which a predetermined number of one or more of the plurality of display units is sequentially rewritten, and the situation determination unit is configured to supply power to one of the display units. In response to the input of a signal indicating that the child tag is approaching, a signal indicating rewriting of the display on the display unit may be output.

[0012] Further, the switching display control unit determines whether or not a predetermined operation process has been completed. A processing determination unit may be provided, and when the end of the operation is determined by the processing determination processing unit, it may be rewritten to the next display.

 [0013] It is preferable that the display unit includes electronic paper for display.

[0014] In addition, a display system control method according to another aspect of the present invention includes a step of displaying default display content on a plurality of display units, and other display content when a change in situation occurs. And displaying a different display content on the plurality of display units depending on a place where the display unit is arranged.

[0015] Further, when the change of the situation occurs, the plurality of display units may be rewritten at the same time, or one or more predetermined number of display units among the plurality of display units are sequentially rewritten. You may do it. Furthermore, it is preferable that the display unit has electronic paper for display.

 The invention's effect

 [0016] The present invention displays the content different from the default display content according to the location where the display means is arranged in response to the change in the situation. The optimum information can be given to the display location. In addition, the existing display means can be used effectively, and display with a high visual effect can be performed. Furthermore, a plurality of display units can be rewritten at the same time, or a specific display unit can be rewritten sequentially, so that it can be used for various purposes. In particular, when electronic paper is used as the display means, only the power is used for rewriting, so that the display cost can be reduced.

 Brief Description of Drawings

 FIG. 1 is a diagram showing a schematic configuration of a display control apparatus using electronic paper according to an embodiment of the present invention.

 FIG. 2 is a diagram showing a cross-sectional configuration of electronic paper used in one embodiment of the present invention.

 FIG. 3 is a diagram (part 1) illustrating an operation flow of one embodiment of the present invention.

 FIG. 4 is a diagram (part 2) illustrating an operation flow of one embodiment of the present invention.

 FIG. 5 is a diagram showing an operation flow of an evacuation guidance display as specific example 1;

 [FIG. 6] (a) and (b) are examples of display of electronic paper used in Example 1.

[FIGS. 7] (a) and (b) are diagrams for explaining the display information for the display in Example 2. FIG. 8 is a diagram showing an operation flow of display of an exhibition guide in specific example 2.

 FIG. 9 is a diagram showing an operation flow of in-vehicle guidance display of specific example 3.

 FIGS. 10 (a) and 10 (b) are diagrams showing an example of in-vehicle guidance display of specific example 3.

 [Fig. L l] (a) and (b) are diagrams (No. 1) for explaining the operation procedure display of Example 4.

 [FIG. 12] (a) and (b) are diagrams (part 2) for explaining the operation procedure display of the specific example 4.

 FIG. 13 is a diagram (No. 1) showing an operation flow of operation procedure display in Example 4.

 FIG. 14 is a diagram (part 2) illustrating an operation flow of operation procedure display in the fourth specific example.

 [FIGS. 15] (a) and (b) are diagrams illustrating traffic sign rewriting display of specific example 5.

 FIG. 16 is a diagram for explaining an operation flow of traffic sign rewriting display of specific example 5;

 BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

 FIG. 1 is a diagram showing an outline of a display control apparatus using electronic paper according to an embodiment of the present invention. The display control apparatus includes a display switching control unit 10 and a display unit 20 that is controlled to be switched by the display switching control unit 10. The display switching control unit 10 determines display contents and sends them to the display unit 20. The display unit 20 includes at least one electronic paper as display means, and the display content received from the display switching control unit 10 is electronically transmitted. Display on paper 24. Here, the display switching control unit 10 may be configured integrally with the force display unit 20 configured as a server.

 [0020] The display switching control unit 10 has a display mode unit 11 that determines whether the display mode of the electronic paper 24 is the simultaneous display mode or the sequential display mode, and whether or not to switch the display content. A situation determination unit 12 for determining and a content storage unit 13 for storing various contents for display are provided. When the situation determination unit 12 determines that the display content is to be switched, the display mode information of the display mode unit 11 and the display content data from the content storage unit 13 are written in the display table 14. The display table 14 is a table corresponding to a plurality of electronic papers 24, and stores contents to be displayed corresponding to each electronic paper. Thereafter, the written data stored in the display table 14 is transmitted to each display unit 20 via the transmission unit 15.

[0021] Each display unit 20 receives data to be rewritten and displayed on the display unit 20 by the receiving unit 21, The received data is stored in the writing unit 22. The display unit for rewriting is written on the electronic paper 24 by the writing unit 22 and displayed simultaneously or sequentially.

 Further, the display unit 20 includes an operation input unit 25 to which a user operation is input, and a transmission unit 26 that transmits an operation signal from the operation input unit 25 to the display switching control unit 10. The display switching control unit 10 includes a reception unit 17 that receives a signal from the transmission unit 26, and a process determination unit 16 that determines whether or not the process by the user operation has ended based on the received signal. The process determination unit 16 switches the display of the electronic paper 24 of the display unit 20 in accordance with the end of the process by the user's operation.

 [0023] The connection between the display switching control unit 10 and the display unit 20 may be wired or wireless. In the present embodiment, electronic paper is used as the display means. However, the present invention is not limited to this, and other liquid crystal display devices, organic EL display devices, and the like may be used.

 FIG. 2 shows a cross-sectional configuration of an electronic paper using a cholesteric liquid crystal capable of color display used in this embodiment. This electronic paper can be bent thinly. A blue display unit 31, a green display unit 32, and a red display unit 33 are stacked in order from the upper display surface of the figure. The blue display unit 31 includes a blue cholesteric liquid crystal layer 311 that can selectively reflect blue, and is sandwiched between the upper substrate 312 and the lower substrate 313, and is used for the blue color between the upper substrate 312 and the lower substrate 313. The voltage can be applied from the pulse voltage source V31. In the green display portion 32, a green cholesteric liquid crystal layer 321 capable of selectively reflecting green is sandwiched between the upper substrate 322 and the lower substrate 323, and the green display portion 32 is disposed between the upper substrate 322 and the lower substrate 323. The voltage can be applied from the pulse voltage source V324. The red display section 33 is a red cholesteric liquid crystal layer that can selectively reflect red 321 1S is sandwiched between the upper substrate 322 and the lower substrate 323, and the red pulse voltage between the upper substrate 332 and the lower substrate 333 Voltage can be applied from source V33. Further, a light absorption layer 34 is disposed on the back surface of the lower substrate 323 of the red display portion 33.

[0025] The cholesteric liquid crystal used in each of the display units 31 to 33 is a liquid crystal mixture in which a chiral additive (chiral material) is added to a nematic liquid crystal in a relatively large amount at a content of several tens of weight%. . The cholesteric liquid crystal layer has bistability, a planar state that reflects light of a specific wavelength, and a focal code that transmits light according to the electric field strength applied to the liquid crystal layer. The state can be taken in the middle state or the intermediate state between them, and the state can be stably maintained even when the voltage is not applied afterwards. Therefore, by applying a voltage from the pulse voltage sources V31 to V33 corresponding to each color only when displaying or changing the display, blue, green, and red light are selectively reflected in each layer, so that the memory performance is improved. A full color display is possible. In addition, other publicly known electronic paper can be used. Further, electronic paper that is monochrome display instead of color display may be used.

3 and 4 show an operation flow of the display control device of FIG.

[0027] Here, it is assumed that the plurality of display units 20 of the display control device includes display units 20-i (l≤i≤N). Hereinafter, each unit configuring each display unit 20-i is, for example, Electronic paper 24—shown in i (l≤i ≤N).

 [0028] First, as shown in step S11, during normal times, the electronic paper 24 is used for various displays such as advertising posters. It operates as an advertising medium, and each electronic paper 24—i has a default content D ( i) (l≤i≤N) 1S is displayed.

 [0029] In step S12, the status determination unit 12 of the display switching control unit 10 determines whether or not a status flag indicating that a change has occurred in the status. The situation judgment unit 12 turns on the situation flag depending on whether a signal indicating a situation change is input or whether the situation judgment unit 12 itself detects a situation change. If the status flag is off, the process returns to step S11 to continue the default display. If the status flag is on, the process proceeds to step S13, and the content for rewriting C (i) (l ≤i≤N) is read

[0030] Examples of changes in the situation of power that will be described later with specific examples include the occurrence of disasters, detection of electronic tags, etc., and changes to situations where the display content of electronic paper 24 needs to be changed. For example, the status flag of the status determination unit 12 is turned on. The rewritten display content C (i) to be read is, for example, an instruction for an evacuation route when a disaster occurs, and is a display corresponding to the electronic tag when an electronic tag is detected.

[0031] Furthermore, the display content for rewriting C (i) is displayed appropriately at the position of the placement on each electronic paper 24-i. Therefore, the power that normally gives different display is not necessarily different for all electronic papers 24. Absent. In addition, as shown later, electronic paper 24 When only the specified electronic paper 24-i without rewriting is sequentially rewritten and displayed (sequential mode), only the designated electronic paper 24-i is rewritten.

 [0032] Next, in step S14, the display table 14 stores the display mode from the display mode unit 11 and the rewritten display content C (i) from the content storage unit 13. Here, if the display mode is the sequential display mode, data for designating the reading order of the content C (i), that is, the writing order to the electronic paper 24 is stored together with the display content for rewriting C (i).

 [0033] In step S15, it is determined whether the display mode for rewriting the display is the simultaneous display mode or the sequential display mode. In a specific example described later, for example, the display mode when a disaster occurs is a simultaneous display mode, and when a disaster occurs, the display is switched simultaneously for all the electronic papers 24. On the other hand, in the sequential display mode, the display is sequentially rewritten for a predetermined electronic vapor 24-i. If it is determined in step S15 that the display mode is the simultaneous display mode, the process proceeds to step S16.

 In step S16, data received via the receiving unit 21-i of the display unit 20-i is written to the writing unit 23-i of the display unit 20-i. The data written in the writing section 23-i is the data for the display section 20-i of the display table of the display switching control section 10. The data indicating the simultaneous display mode and the display content C for rewriting for the electronic paper 24-i C (i). In step S17, the display content C (i) for rewriting is displayed on each electronic paper 24-i in place of the default content D (i).

 [0035] Thereafter, in step S18, it is determined whether or not the force / force force for which the change of the situation is determined by the situation determination unit 12 of the display switching control unit 10, that is, whether or not the situation flag is turned off. If the status flag is still on, the process returns to step S17 and continues to display the display content C (i).

If the status flag of the status determination unit 12 is off in step S18, the process proceeds to step S19, and the display switching control unit 10 receives the default display content D (i) from the content storage unit 13. The default display content D (i) is read and stored in the display table 14 together with the display mode information from the display mode unit 11. Stored data is sent by the transmitter 1 5 is transmitted to each display unit 20-i, and each display unit 20-i receives data to be displayed on the electronic paper 24-i.

 [0037] The default display content D (i) received by the receiving unit 21 of the display unit 20 is written in the writing unit 22 in step S20 together with the display mode information, and the process returns to step S11 to return to the default content D ( i) is displayed on the electronic paper 24.

 Returning to step S 15, when it is determined in step S 15 that the display mode is the sequential display mode, the process proceeds to step S 21 in FIG. In step S21, since the writing order is stored together with the rewriting display content C (i), the rewriting display content C (i) is written on the electronic paper according to the writing order T. Since it is the sequential display mode, it is only necessary to specify the electronic paper that needs to be changed sequentially as the display content C (i) for rewriting! When displaying the recovery procedure at the time of equipment failure shown in the specific example described later, the contents of the electronic paper attached to the parts to be operated are changed according to the operation. In this case, it is not necessary to change the display of the electronic paper attached to the parts other than the parts to be operated. Of course you can change it if necessary.

 In step S22, the designated rewritten content C (i) is displayed on the electronic paper 24-i designated in the writing order T. In step S23, it is determined whether or not the user's processing corresponding to the rewritten content C (i) has been completed. That is, when a user performs a necessary operation in accordance with the work instruction of the rewriting content C (i), the operation is input by the operation input unit 17 of the display unit 20, and the transmission unit 26 of the display unit 20, the display switching control is performed. The data is sent to the processing determination unit 16 of the display switching control unit 10 via the reception unit 17 of the unit 10. For example, in the case of the rewritten content C (i) power failure recovery procedure, a signal corresponding to the operation performed by the user for the displayed procedure is sent to the processing determination unit 16. The process determination unit 16 determines the process. If the instructed process has not been completed, the process returns to step S 22 to continue displaying the rewritten content C (i). If the process has been completed, the display contents of the electronic paper 24-i Rewrite content C (i) force and return to default content D (i).

Next, in step S25, the status determination unit 12 of the display control unit 10 determines whether or not the status flag is turned off. Here, the case where the status flag is turned off means that the above-mentioned device failure occurs. In the case where the recovery procedure is displayed, this corresponds to the case where the failure of the device is corrected. If the status flag is not turned off, the write order T = j is incremented to j + 1 in step S26, the process returns to step S21, and steps S22 to S25 are repeated.

 If it is determined in step S25 that the status flag is OFF, the process proceeds to step S19 in FIG. 3, and the default display content D (i) is read from the content storage unit 13 as in the simultaneous display mode. And stored in the display table 14 together with the display mode information. The stored data is transmitted from the transmission unit 15 to the display unit 20. The default display content D (i) received by the receiving unit 21 of the display unit 20 is written to the writing unit 22 in step S20 together with the display mode information, and the process returns to step S11, and the default content D (i) is changed. Display on electronic paper 24-i.

 [0042] Note that by returning to the default display content D (i) in step S24, the default display content D (i) is displayed on all the electronic papers 24 when the status flag is turned off. If so, steps S 19 and 20 can be skipped.

 (Specific example 1: Evacuation guidance display)

 Fig. 5 shows the operation flow of Example 1 in which the present invention is applied to evacuation guidance in a public transport station. In Example 1, N posters placed at a station are composed of electronic paper. Normally, as in step S31, the electronic paper 24 operates as one of various posters, and the default display content D (i) force, which is advertising and other poster data, for example, the advertisement display 41a in FIG. 6 (a). Is displayed.

 [0043] In step S32, when the situation flag notifying the occurrence of the disaster is turned on in the situation judging unit 12 of the display switching device 10, in step S33, together with the simultaneous display mode signal instructing the simultaneous display from the display mode unit 11. Then, the evacuation guidance content C (i) for displaying the evacuation guidance is read from the content storage unit 13. Evacuation guidance content C (i) indicates the most appropriate evacuation guidance route for each location (i) where electronic paper is placed.For example, an arrow as shown in Fig. 6 (b) is displayed. The guidance display 41b may be used. The signal to turn on the status flag to notify the occurrence of a disaster may be a signal from an administrator managing the station or a fire detection signal from a fire alarm.

[0044] Next, in step S34, the display table 14 includes a signal indicating the simultaneous display mode. The evacuation guidance content C (i) corresponding to each display unit 24 is stored from the content storage unit 13. In step S35, it is determined whether the display mode is the simultaneous display mode force sequential display mode. In this example, since it is the simultaneous display mode, the process proceeds to step S36. In step S36, the evacuation guidance content C (i) sent from the transmission unit 15 of the display switching control unit 10 is written into the writing unit 22-i via the reception unit of the force display unit 20-i. Next, in step S37, the evacuation guidance content C (i) is displayed on each electronic paper 24-i simultaneously. After that, in step S38, the situation determination unit 12 confirms whether or not the situation flag based on the disaster occurrence information is turned on. If disaster occurrence information exists, the process returns to step S37 and evacuation guidance content C (i) Continue to display.

 [0045] If no disaster occurrence information exists in the situation determination unit 12 in step S38, that is, if the situation flag is turned off, in step S39, the display switching control unit 10 uses the content storage unit 13 as the poster data. A certain default display content D (i) is read out and stored in the display table 14 together with the simultaneous display mode information from the display mode unit 11. The stored data is transmitted from the transmission unit 15 to the reception unit 21 of the display unit 20. The display content D (i) received by the receiving unit 21 is written to each writing unit 22 in step S20, and normal poster display in step S11 is resumed.

 [0046] In this way, in the event of a disaster, all the posters that occupy a publicly visible place indicate all the evacuation routes, so evacuate through the shortest route that the user will not lose. be able to. In this embodiment, the arrow indicating the evacuation route is displayed. However, other displays may be used, and some electronic papers other than the evacuation route instruction may drop the user. You may make it show the slogan to be able to get stronger. In addition, it is possible to display useful information depending on the location when a disaster occurs.

 (Specific example 2: Exhibit information display)

This example is an example of a system that guides or guides a tour course for viewing museum exhibits. The museum may set up multiple tours for viewing the exhibits. In this case, the visitor can select the tour course and see the exhibits that suit the visitor's preference. However, if a variety of tour courses are set, a large number of information boards are required, making it difficult to guide the visitors correctly. [0047] In this example, the visitor wears an electronic tag having information corresponding to the selected tour course. When the electronic tag is detected by the detector, the tour course of the visitor with the electronic tag is identified, and the display contents of the electronic paper, which is placed near the exhibit and is normally displayed, Change to guide the visitor's tour course. In addition, the tour course consists of the visitor changing the setting of the electronic tag so that it can be set for each visitor.

 FIGS. 7 (a) and 7 (b) are explanatory diagrams for explaining the outline of the specific example 2. FIG. In this example, there are N works, and work i (l≤i≤N) is placed at location i. Figure 7 (a) shows a case where a visitor who has not specified a tour course walks down the aisle to view work i. The electronic paper 24-i is placed on the floor that is the tour route in the vicinity where work i is placed, and information D (i) such as the title or name of the work i is displayed. Note that a transparent protective plate may be disposed on the electronic paper 24 for protecting the electronic paper 24.

 [0049] Fig. 7 (b) shows the case where a visitor comes to visit work i with an electronic tag δ corresponding to a certain tour course. In the vicinity of the work i, a detector 12a for detecting the electronic tag δ is arranged. When the visitor enters the predetermined range around the work i and approaches the detector 12a, the visitor's electronic tag δ is detected by the detector 12a, and the situation judgment unit 12 is detected by a signal output from the detector 12a. The status flag is turned on, and the display of electronic paper 24—i switches to the normal display D (i) power visitor's tour course guidance. For example, the next work to be observed is work j. To do.

 [0050] Fig. 8 shows an operation flow of the second specific example in which the present invention is applied to the guidance of exhibits.

[0051] In step S41, a default display D (i) such as the work name or author name of work i is displayed on the electronic paper placed on the floor of exhibition place i. In step S42, the situation determination unit 12 causes a visitor having an electronic tag δ to exist at a certain exhibition place i (hereinafter, i is the place where the electronic tag δ is detected in Specific Example 2). Judgment is made. When a visitor with an electronic tag δ approaches display place k and detector 12a arranged at display place i detects the signal of electronic tag δ, a detection signal is sent to situation determination unit 12 to The status flag of Judgment 12 is turned on. Therefore, by judging whether or not the situation flag of the situation judging unit 12 is on, it is possible to determine whether or not the visitor's power with the electronic tag δ at the exhibition place i is available. Refused.

 [0052] If the visitor has the electronic tag δ at the exhibition place i, the process returns to step S41 to continue the default display D (i). If it is determined in step S42 that there is a visitor having the electronic tag δ at the exhibition place i, in step S43, guidance display data that differs depending on the electronic tag δ held by the visitor is read from the content storage unit 13 and further displayed. From the mode section 11, the display mode is sequentially read out as the display mode of the guidance display data.

 [0053] In step S44, display contents C (i) to be displayed on the electronic paper are sequentially stored in the display table 14 together with a signal indicating the display mode.

 [0054] In step S45, the display mode is determined. In this example, since it is the sequential display mode, the process proceeds to step S46. Unlike the simultaneous display mode, the sequential display mode rewrites only the display on the specified display section. In this example, only the display of the display unit 24-i where the electronic tag δ is close is rewritten.

 [0055] In step S46, the display content C (i) force sent from the transmission unit 15 of the display switching control unit 10 is transmitted via the reception unit 21-i of the specific display unit 20-i to which the electronic tag δ approaches. The writing mode 22-i of the electronic paper 24-i is sequentially written as a mode. Next, in step S47, based on the display content C (i), a display for guiding the next exhibit of the visitor having the electronic tag δ is displayed on the electronic paper 24-i.

 [0056] After that, if the electronic tag δ is detected in step S48, the process returns to step S37 to continue the display C (i). If the electronic tag δ is no longer detected, the default content is displayed in step S49. D (i) is read, and in step S50, content D (i) is written and display of content D (i) is resumed.

 [0057] With this configuration, even in an art museum having a large number of tour courses, it is possible to effectively guide visitors without providing a large number of guide plates. In this example, the electronic paper 24 may be another place such as a force wall placed on the floor. When different electronic tags are detected almost simultaneously, the display corresponding to each electronic tag may be displayed for a predetermined time, and various other switching displays can be executed as appropriate.

 (Example 3: In-car guidance display)

Example 3 applies the present invention to a guide display system in a public transport vehicle. is there. A hanging poster placed in a car for promotion or a poster hung on the wall is composed of electronic paper, and when the train approaches the stop, these display contents are displayed according to the place where the poster is placed. Change all at once.

 FIG. 9 shows an operation flow of the third specific example in which the present invention is applied to the in-train guidance display. In this example, N hanging posters arranged in the train are composed of electronic paper. As in step S51, the electronic paper 24 is normally used as an advertising poster.

 [0059] In step S52, the situation determination unit 12 of the display switching device 10 determines whether or not the train is capable of entering the station platform to stop. The status flag of the status judgment unit 12 is turned on when it detects that the train has approached the stop station. If the status flag remains off, it is determined that the train will not stop, so the poster display in step S51 is continued.

 [0060] When the train approaches the stop station and the status flag is turned on, in step S53, together with the simultaneous display mode signal instructing simultaneous display from the display mode unit 11, the content storage unit 13 sets the position of each poster. In response, the passenger guidance content C (i) for rewriting is read out to guide the passenger. Passenger guidance content C (i) may, for example, indicate the most appropriate guidance to the door closest to the place where the poster is placed.

 [0061] FIGS. 10 (a) and 10 (b) show examples of displays in the train. Figure 10 (a) is an example of a hanging poster made up of electronic paper placed in a train. Two electronic papers are displayed on a computer advertisement poster 45a, 45b while the train is running. This is the default display content D (i). When the train approaches the stop station, it operates as the guide posters 45b and 46b rewritten with the display content C (i) for guiding passengers to get off as shown in FIG. 10 (b). In Fig. 10 (b), one sheet of electronic paper shows that the left door opens in the direction of travel, and the other sheet of electronic paper leaves the door when it gets off the door. The exit indicates that the escalator is in front. This guidance content can vary depending on the location of the electronic paper poster, and from other trains it can be guided that the station exit is behind.

[0062] Next, in step S54 in Fig. 9, the display table 14 includes a signal indicating the simultaneous display mode from the content storage unit 13 to the passenger guidance container corresponding to each electronic paper 24-i. Content C (i) is stored. In step S55, it is determined whether the display mode is the simultaneous display mode or the sequential display mode. In this example, since it is the simultaneous display mode, the process proceeds to step S56. In step S56, the passenger guidance content C (i) sent from the transmission unit 15 of the display switching control unit 10 is written into the writing unit 22 via the reception units of all the display units 20. Next, in step S57, the passenger guidance content C (i) is displayed on each electronic paper 24-i at the same time.

 Thereafter, in step S58, it is determined whether or not the train has left the station platform, that is, whether or not the status flag of the status determination unit 12 is off. If the train is stopped at the station platform, the process returns to step S57 and the guidance display is continued. The plan for passengers may be to turn off the status flag and return to the advertising poster before the train departs after a predetermined time, for example, enough time for the passenger to get off.

 [0064] If it is determined in step S58 that the status flag of the status determination unit 12 is off and the train has left the station, the default poster data D (i) is read from the content storage unit 13 in step S59. Then, it is transmitted to the display unit 20, and is written in the writing unit 22 in step S60, and the normal advertisement poster display in step S51 is resumed.

 [0065] In this way, guidance display is performed using a poster that is normally used for advertisement in a car and occupies a place that is visible to the public, so a special guidance display section is not required. In addition, since the optimum guidance can be instructed for each place where the poster is placed, it is possible for the user to provide accurate guidance with good visibility. Furthermore, since electronic paper is used, it is economical because it only requires power to be supplied when the display is switched.

 (Specific example 4: Operating procedure display)

 For example 4, electronic paper is affixed to a device such as a printer or a copier, and the part name and instructions for normal operation are displayed. When an accident or failure occurs, the contents displayed on the electronic paper To display the location to be operated to correct the failure and the operation there.

FIG. 11 and FIG. 12 show an example in which the present invention is applied to a printer. In FIG. 11 (a), the display 5 la “paper feed tray A4” indicating that it is a paper feed tray for A4 paper is displayed by electronic paper affixed to the paper feed tray of the printer 50. Figure 11 (b) shows a paper jam in the input tray. Indicates the case where the error occurred. In this case, the display of the electronic paper displaying the paper feed tray is rewritten to the display 51b instructing an operation for clearing the paper jam. FIG. 12 (a) shows the paper feed tray that has been pulled out, and shows that a display 53a is displayed indicating that the paper feed tray is for A4 under normal conditions. Figure 12 (b) shows that if the cause of the paper jam is the result of overloading the tray, the display 53b prompts you to reduce the amount of paper.

FIG. 13 and FIG. 14 are operation flows of the fourth specific example.

 [0068] N sheets of electronic paper are affixed to the printer, and usually the electronic paper is affixed to display a part name display, an explanation of operations, precautions, and the like. In the flow of FIG. 13, the content normally displayed on the electronic paper is shown as the default 'content D (i)'. The location where electronic paper is affixed includes doors, drawers, paper feed ports, discharge ports, toner containers, and other parts that must be operated when a failure is recovered.

 [0069] In step S61, the default display D (i) is displayed on the electronic paper affixed to the printer in a normal state. In step S62, the situation determination unit 12 determines whether or not a failure has occurred in the printer. If no failure has occurred, continue to display the default 'content D (i) on electronic paper. If an accident such as a paper jam or a failure occurs in the printer, a detection signal is sent to the status determination unit 12, and the status flag of the status determination unit 12 turns on to notify the occurrence of the failure. Here, it is assumed that a failure has occurred in a part to which a certain electronic paper 2 4-i is attached.

 In this way, when it is determined in step S62 that a failure has occurred, in step S63, content C (i) (in this case, a certain electronic device) of the work instruction at the time of failure is received from the content storage unit 13. Part 24—Work instruction content to be displayed only on i) is read together with data indicating the order of writing of work instruction content C (i), that is, the order of display. The display mode is sequentially read out as the display mode of the instruction data.

[0071] In step S64, the work instruction content C (i) to be displayed on the electronic paper and the display order data are stored in the display table 14 together with a signal indicating the sequential display mode. Next, in step S65, the display mode is determined. In this example, since it is the sequential display mode, the process proceeds to step S66 in FIG. [0072] In step S66, the work instruction content C (i) force sent from the transmission unit 15 of the display switching control unit 10 must be treated for recovery from the failure via the reception unit of the display unit 20. Are written as sequential mode in the writing section 22-i of the electronic paper 24-i attached to the printer. In step S67, based on the work instruction content C (i), the work instruction is displayed on the electronic balances 24-i. In this way, only the display on the electronic paper where the fault should be corrected is rewritten.

 [0073] In step S68, the process determination unit 16 determines whether or not the work instructed by the electronic paper 24-i is completed. That is, when a user performs a necessary operation in accordance with the work instructions displayed on the electronic paper 24-i, the operation is input by the operation input unit 17 of the display unit 20, and the transmission unit 26, The data is sent to the processing determination unit 16 via the reception unit 17 of the display switching control unit 10. As a result of the determination by the process determination unit 16, if the user's operation has not been completed, the display of the work instruction content C (i) is continued. If the process determining unit 16 determines that the instructed work has been completed, the display table 14 is rewritten by the signal output from the process determining unit 16, and the display of the work instruction on the display unit 20-i is the default. Return to D (i).

 [0074] Next, in step S70, it is determined whether or not a status flag indicating a failure in the status determination unit 12 is turned off. If the status flag of the status determination unit is still on, in step S71, the writing order (i) is incremented in order to write work instruction data instructing the user to perform the next work, and the process returns to step S66. In step S66, the next work instruction content C (j) is written from the display table 14 to the writing unit 22-j from the receiving unit 21j of the display unit 20-j via the transmitting unit 15, and then in step S67. Thus, the display of the electronic balance 24-j at the work location is changed to the display of the work instruction as well as the default display power.

[0075] Further, steps S68 to S70 are repeated. That is, in step S68, the process determination unit 16 determines whether or not the work is finished. If it is determined that the work is finished, the display of the work instruction on the display unit 24-j is changed to the default display as described above. In step S70, it is determined whether or not the status flag indicating the failure of the status determination unit 12 is turned off. If the status flag is still ON, the process returns from step S71 to step S66 and repeats to step S70. [0076] If the status flag of the status determination unit 12 is turned off in step S70, the default content D (i) is displayed, so the process returns to step S61 in Fig. 13 to return to the default content. D Continue to display (i).

 [0077] As described above, since the recovery procedure can be displayed for each member to be operated, such as when the apparatus has failed, the user operates the displayed member according to the display. Failure can be recovered. In addition, since the display already arranged is switched, it is not necessary to arrange a new display means. In addition, since electronic paper is used, it is economical because only voltage is applied when switching.

 [0078] Note that the display content of the electronic paper may include a content indicating the next operation location, or may display a caution during other operations. In addition, the present invention can be applied to inspections not only when a failure or abnormality occurs but also when it is necessary to sequentially operate other device components.

 (Example 5: Traffic sign switching display)

 Traffic signs are often found on streets. If the traffic sign is composed of electronic paper and can be rewritten, the road sign that is designated as a pedestrian road only for a certain period of time will be displayed as “pedestrian-only road” information and “cancel pedestrian-only road”. This information can be switched and displayed, and the power can be saved only by using power only when switching. In Example 5, a large number of traffic signs are made up of electronic paper, and a large number of traffic signs are used for purposes different from those intended for ordinary traffic signs.

 [0079] In this example, various events (construction, festival traffic restrictions, pedestrian heaven designated day of the week, etc.) that are held for a certain period, and warning areas that are set only for a certain period (tsunami warning area when an earthquake occurs, Many areas are installed in designated areas, including event areas or warning areas, such as fire occurrence areas, gas leak warning areas due to accidents, landslide warning areas due to long rains, escape areas for perverts and thugs, etc. Yes! / Use all traffic signs to display event or warning information.

[0080] FIG. 15 shows an example in which traffic signs are used as prohibition signs to the area under construction. The traffic signs 61a to 66a in Fig. 15 are all electronic paper, and are usually used as predetermined signs. Depending on the start or preparation of road construction, signs 61a to 66a Among them, a predetermined sign will indicate that construction is in progress. In FIG. 15 (a), of the signs 61a to 63a, the signs 61a and 62a are rewritten to the signs 61b and 62b indicating that construction is in progress. In (b), sign 65a is rewritten to sign 65b indicating that construction is in progress.

In this way, another display board notifying that the construction is in progress is not necessary, and guidance with good visibility for the driver of the vehicle is possible. The signs 63a, 64a and 66a may be replaced with a display notifying that construction is in progress, or the signs 63a, 64a and 66a may be turned off.

 FIG. 16 shows an operation flow of the fifth specific example. In Example 5, the road sign is composed of N pieces of electronic paper 24, and the traffic signs are displayed on the electronic paper 24 in normal times as in step S81.

[0083] In step S82, it is determined whether or not the construction has started. If the construction has not started, normal traffic signs will continue to be displayed. In step S82, when the construction is started or prepared and the status flag that indicates that the construction is in progress is turned on in the status judgment unit 12 of the display switching device 10, the simultaneous display from the display mode unit 11 is instructed in step S83. Along with the simultaneous display mode signal, the content accumulating unit 13 reads out the closed content C (i) for displaying the closed road during construction. Construction notice data content C (i) is designed to prevent entry from the location _(i) where the electronic paper is placed to the construction site, and the most appropriate display is selected for each location (i). Has been. It is also possible to display a message such as “There is a closed road during the next construction” in front of the closed sign as shown in FIG. If there is electronic paper that is far away from the construction site, of course, normal traffic signs will continue.

[0084] Next, in step S84, the evacuation guidance content C (i) corresponding to each display unit 24 is stored from the content storage unit 13 together with a signal indicating the simultaneous display mode in the display table 14. In step S85, it is determined whether the display mode is the simultaneous display mode or the sequential display mode. In this example, since it is the simultaneous display mode, the process proceeds to step S86. In step S86, the closed content C (i) force sent from the transmission unit 15 of the display switching control unit 10 is written into the writing unit 22 via the reception unit of the force display unit 20. Next, in step S37, the evasion guidance content C (i) is displayed on each electronic paper 24-i at the same time. Then step In step S38, the status determination unit 12 confirms whether the status flag indicating that the construction is in progress is on. If the construction is under construction, the process returns to step S87 and the display of the closed content C (i) is continued.

 [0085] In step S88, if the status flag indicating that construction is in progress is turned off in status determination unit 12, the process has ended. In step S89, display switching control unit 10 causes default setting from content storage unit 13 to start. The traffic sign data D (i) is read out and stored in the display table 14 together with the simultaneous display mode information from the display mode section 11. The stored data is transmitted from the transmission unit 15 to the reception unit 21 of the display unit 20. The traffic sign data D (i) received by the receiving unit 21 is written to each writing unit 22 in step S20, and the normal traffic sign display in step S11 is resumed.

 [0086] As described above, a large number of traffic signs installed in a certain area are used at the same time and switched to a display for a predetermined purpose at an event or warning of the whole area that is held for a certain period of time. It is useful for disseminating events and alerts without using new signs and posters. In addition, since electronic paper is used, switching can be displayed simply by consuming power when switching, which is also economical.

Claims

The scope of the claims  [1] For multiple rewritable displays that always display default display content  A display switching control unit that performs rewrite control is provided.  The display switching control unit outputs a signal instructing rewriting of the display in response to a change in the situation;  A display content storage unit that stores the default display content, and stores a rewrite display content different from the default display content according to a place where the display unit is disposed,  The display content for rewriting is read from the display content accumulating unit in response to a signal instructing rewriting from the situation determination unit, and the display content of the differential display of the plurality of display units is rewritten.  A display control device.  [2] The display switching control unit further includes a display mode unit for designating a display mode of display content, and the display unit displays in the display mode designated by the display mode unit when the display content is rewritten. The display control device according to claim 1, wherein:  3. The display control apparatus according to claim 2, wherein the display mode is a simultaneous display mode in which the plurality of display units are rewritten simultaneously. 4. The display control apparatus according to claim 3, wherein the default display content is for advertisement, and the display content for rewriting is for evacuation guidance. 5. The display control apparatus according to claim 2, wherein the display mode is a sequential display mode in which a predetermined number of one or more of the plurality of display units is sequentially rewritten. 6. The status determination unit according to claim 5, wherein the status determination unit outputs a signal instructing rewriting of the display on the display unit by inputting a signal indicating that an electronic tag has approached one of the display units. Display control device. [7] Further, the switching display control unit includes a processing determination unit that determines whether or not the processing of the predetermined operation has ended, 6. The display control device according to claim 5, wherein when the end of the operation is determined by the processing determination processing unit, the display is rewritten to the next display. 8. The display control apparatus according to claim 1, wherein the display unit includes electronic paper for display. [9] A control method for a display control device having a plurality of rewritable display units,  A step of displaying default display content on the plurality of display units; and a display content that is different depending on a place where the display unit is arranged when the situation changes. And a step of displaying on a plurality of display units. 10. The control method according to claim 9, wherein when the situation changes, the plurality of display units are rewritten simultaneously. 11. The control method according to claim 9, wherein when a change in the situation occurs, one or more predetermined number of display units among the plurality of display units are sequentially rewritten. [12] The display unit may include electronic paper for display. The control method according to any one of 1 above.