JP2015207115A - image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device that can easily distribute image information particularly in a railway vehicle, in an environment in which a plurality of image display devices are connected with a circuit that can transfer image information.SOLUTION: There is provided one of a plurality of image display devices connected via a network, the image display device reading image information recorded in a portable storage medium to be inserted therein and display/distribution information on display and distribution of the image information, serving as a master when the display/distribution information includes update information and distributing the image information stored in the portable storage medium to other image display devices on the basis of the display/distribution information, serving as a slave when the display/distribution information does not include the update information, receiving the image information distributed from the master, and displaying the image information recorded in the portable storage medium.

Description

  The present invention relates to an image display device, and more particularly to an image display device for a railway vehicle.

  In recent years, image information has been widely used in outdoor sign boards and advertisement image displays in railway vehicles. Railway companies can collect advertisement fees by displaying advertisements in the vehicle and use them as a new source of income. Since a client of an advertisement expects that the effect of the advertisement is as large as possible, a system capable of collecting an advertisement fee corresponding to the effect of the advertisement is disclosed (see Patent Document 1).

  Since the image information of a moving image used for advertisement has a large amount of information, for example, in a railway vehicle, a server is installed in the leading vehicle and distributed from there to a display of each vehicle (see Patent Document 2). . In addition, a plurality of advertisement image information stored in the server is also displayed in combination (see Patent Document 3).

  In general, it is not easy to update image information of a plurality of image display devices. In particular, when a plurality of image display devices are installed in a railway vehicle and a plurality of such vehicles are connected, it is difficult to synchronize the image information of all the image display devices in a short time.

  In recent years, it has been required to easily distribute large-capacity image information to a plurality of image display devices in a railway vehicle. In addition, when the image information is an advertisement, it is necessary to change the type of the image at a point or time zone where the vehicle is operated, and since it is required to replace the image information according to the season, the image information can be easily updated. It is strongly desired.

JP 2006-134120 A JP 2010-16575 A JP 2009-14239 A

  Accordingly, the inventors have studied to easily distribute image information to a display device for advertising image information, particularly a plurality of image display devices installed in a railway vehicle, and image display device of the present application, particularly an image for a railway vehicle. The invention of the display device has been completed.

  An object of the present invention is to provide an image display device that can easily distribute image information in an environment in which a plurality of image display devices are connected to a line capable of transmitting image information, particularly in a railway vehicle.

  In order to solve the above-mentioned problem, the invention described in claim 1 is one of a plurality of image display devices connected by a network, and includes image information recorded on a portable recording medium to be inserted, and The display / distribution related to the display and distribution of the image information is read out, and when the display / distribution information includes update information, the portable information is transferred to another image display device based on the display / distribution information. The image information stored in the recording medium is distributed, or when there is no update information, the image information distributed by the master is received by the slave and is recorded on the portable recording medium, and the portable recording medium The image display device is characterized in that the image information recorded on the screen is displayed.

  A plurality of image display devices are connected to a line capable of transmitting image information. The image display device includes an image display unit that displays an image and a display control unit that transmits image information to the image display unit. The display control unit is information from a portable recording medium such as an SD card that is one of the flash memories to be inserted. Controls the reading of information and the exchange of information with the connected line. The image information is recorded on an SD card inserted into the image display device together with display / distribution information necessary for displaying and distributing the image information. In addition, update information is recorded on an SD card inserted into one of a plurality of image display devices, and the image display device that has read this information is the master, and the image display device that has not read the update information is the master. Become a slave. The master image display device distributes the new image information recorded on the SD card to the slave image display device. The image display apparatus into which the SD card in which update information is not recorded is inserted receives new image information from the master image display apparatus as a slave, and records it in the SD card. Then, the image display device displays the recorded image information.

  According to a second aspect of the present invention, in the first aspect of the present invention, the master image display device is configured to enable the master image display device toward the slave image display device based on the update information. The check packet including the version information of the image information recorded on the portable recording medium is transmitted, and the slave image display device returned from the slave image display device that has received the check packet. The image display device transmits image information held by itself to the image display device that has returned the need packet in accordance with the contents of the need packet including the version information of the image information that the user has.

  The display / distribution information includes version information of image information recorded on the SD card. The master image display apparatus includes the version information in the check packet and transmits the version information to the slave image display apparatus. The slave image display apparatus receives the version information of the image included in the check packet and returns a need packet including the version information of its own image. In response to this, the master image display device transmits new image information, which is a difference, to the image display device that transmitted the need packet.

  According to a third aspect of the present invention, in the first aspect of the present invention, the image information included in the check packet distributed from the master image display device by the slave image display device. If the version information is synchronized with the version information of the image information held by itself, and the version information is synchronized, the image information becomes the master and the image display device that becomes another slave. An image display device that distributes a synchronization confirmation packet including version information of image information included in the image display device.

  When the slave image display device is synchronized with the master image display device with respect to the version of the image information, it sends another synchronization confirmation packet indicating that it does not require new image information. Inform the image display device.

  In the invention described in claim 4, in the invention described in claim 3, the master image display apparatus receives the synchronization confirmation packet from the slave image display apparatus, and the display / display If it is determined whether or not the synchronization confirmation packet has been received from all the slave image display devices based on the distribution information, and if the synchronization confirmation packet has been received from all the slave image display devices The image display device is characterized in that the distribution of the image information is terminated.

  Based on the address information of the image display device to be distributed in the vehicle included in the update information, the image display device that has become the master examines the synchronization confirmation packet from the slave, and all the images to be distributed If the synchronization confirmation packet has arrived from the display device, the synchronization of the image information is terminated.

  The invention described in claim 5 is the invention described in any one of claims 1 to 4, wherein the image display device is directly or indirectly connected to a vehicle line for transmitting vehicle information and installed in a railway vehicle. , Receiving the car number of the railway vehicle installed by itself via the vehicle line and the part information in the railway car, generating its own device ID from the car number and the part information, An image display apparatus that generates an IP address by a predetermined method based on the apparatus ID and exchanges information with another image display apparatus using the IP address.

  In the vehicle line, destination information necessary for the operation of the vehicle, a car number, information on a device installed in the vehicle, and the like are transmitted as vehicle information. Since the vehicle number and the part information indicating the installation position in the vehicle are unique in each image display device, a unique device ID is calculated based on this, and an IP address can be generated by adding a unique vehicle network address. it can.

  The invention described in claim 6 is the invention described in any one of claims 1 to 5, wherein the image display device has a moving image mode for displaying a moving image and a still image mode for displaying a still image. An image display device characterized in that mode switching and image display ON / OFF switching are performed via the vehicle line.

  The image display device has a moving image mode for displaying a moving image used mainly in an advertisement and a still image mode for displaying character information and the like. Since the switching and switching of image display ON / OFF are performed via the vehicle line, various displays are possible.

  A seventh aspect of the present invention is the image display device according to the fifth or sixth aspect, wherein the state is monitored via the vehicle line and a packet for controlling the state and operation is accepted. is there.

  The image display apparatus can be subjected to various controls via a vehicle line. For example, when reset, the state of the image display device returns to the initial state, which is effective when an unexpected error state occurs. Further, although the display of advertisements is time-managed, each image display device operates in synchronization with time information from the vehicle line. In addition, monitoring of the state of the image display device and control other than the above can be performed via the vehicle line.

  The invention described in claim 8 is the invention described in any one of claims 5 to 7, wherein the portable recording medium stores an image information file in which image information to be displayed on the image display unit is stored, the image A scenario file including scenario information describing a plurality of scenarios describing the order of reproducing image information in the information file, and a time table for changing the scenario from the plurality of scenarios according to time zones are described. An image display device comprising a schedule file including schedule information and a log file for recording a history of reproduction of image information.

  The portable recording medium includes a scenario file including scenario information in which a plurality of scenarios describing the order in which the image information in the image information file is reproduced, and a scenario from the plurality of scenarios according to a time zone. Since it has a schedule file including schedule information in which a timetable to be changed is described, an advertisement corresponding to an appropriate time and place can be displayed. In addition, since it has a log file for recording the history of image information reproduction, the advertisement performance can be proved by recording the advertisement display.

  The invention described in claim 9 is the invention according to claim 8, wherein in the scenario file, position information in a railway vehicle of an image display device that displays the image information as scenario information, and the image An image display device comprising: a name of the image information to be displayed on a display unit; a point where the image information is displayed; and the number of times the image information is repeatedly displayed.

  Since the scenario file stores information necessary for effectively displaying advertisements, it is possible to easily manage a plurality of pieces of video information.

  According to a tenth aspect of the present invention, in the invention according to the eighth or ninth aspect, the image display device acquires the image based on operation information, schedule information, and scenario information acquired via a vehicle line. An image display device characterized by a recording medium for displaying information.

  The display control unit of each image display device having time information selects a scenario of the scenario file based on the schedule information of the schedule file that specifies the time when the advertisement is to be played, and the image information is displayed based on the scenario information of the scenario. The

  According to an eleventh aspect of the present invention, in the invention according to the eighth or ninth aspect, the portable recording medium includes operation setting information for setting an operation of the display control unit in accordance with a use type of the railway vehicle. The display control unit acquires the use type of the railway vehicle as operation information from a vehicle line, and reads the operation setting information together with the image information, the schedule information, and the scenario information from the portable recording medium. The image information is displayed based on the operation information, the schedule information, the scenario information, and the operation setting information.

  Railway vehicles may have different destinations for each vehicle, and in addition to normal driving, types of uses such as forward driving and test driving are determined. In addition, when a passenger is absent, detailed operation such as no advertisement is possible.

  According to the first aspect of the invention, the image display device reads and displays the image information recorded on the portable recording medium and distributes it to other image display devices. By renewing the image information of the portable recording medium, the image information of other image display devices connected to the network can be renewed, thereby saving labor.

  According to the second aspect of the present invention, the display / distribution information includes the version information of the image information recorded on the portable recording medium such as the SD card. When distributing new image information, the display device includes the version information in a check packet and transmits it to another image display device. The slave image display apparatus receives the version information of the image included in the check packet and returns a need packet including the version information of the own image, so that reliable image information synchronization is possible.

  According to the third aspect of the present invention, when the image display device that has become a slave synchronizes with the image information of the master, it synchronizes the image information by delivering a synchronization confirmation packet to other image display devices. Can be ensured.

  According to the invention described in claim 4, the image display device serving as the master receives the synchronization confirmation packet from the image display device serving as the slave, so that images on all the image display devices in the vehicle are displayed. Knowing whether or not the synchronization of the information is established, and the synchronization of the image information is completed, the distribution of the image information is terminated, so that a wasteful operation can be achieved.

  According to the invention described in claim 5, the image display device in the vehicle receives the number of the railway vehicle on which it is installed via the vehicle line and the part information in the railway vehicle, The device ID is generated from the car number and the part information, and the unique IP address is generated by a predetermined method based on the device ID. A reliable exchange of information between them.

  According to the invention described in claim 6, since the screen to be displayed or the screen ON / OFF is switched through the vehicle line, various displays are possible, and wasteful power consumption is reduced. Suppression can be achieved.

  According to the invention described in claim 7, since the image display device receives a packet that is monitored via the vehicle line and controls the state and operation, the state of the image display device is reset or placed by itself. It is possible to synchronize with the in-vehicle system time of the railway vehicle, and it is possible to monitor and control each image display device in the vehicle from the outside using a vehicle line, thereby facilitating maintenance and labor saving.

  According to the invention described in claim 8, the portable recording medium includes a scenario file in which a plurality of scenarios describing the order of reproducing the image information in the image information file are described, according to the time zone. Since it has a schedule file in which a timetable for changing a scenario from a plurality of scenarios is included, an advertisement corresponding to an appropriate time and place can be displayed, and a log that records a history of image information reproduction Since the advertisement display is recorded because the file is included, the actual performance of the advertisement can be proved, so that the image display device can be utilized as an advertisement medium in the vehicle.

  According to the invention described in claim 9, since the scenario file stores information necessary for effectively displaying the advertisement, it is easy to manage a plurality of pieces of video information. Can display a simple advertisement.

  According to the invention described in claim 10, each image display device having time information selects a scenario of the scenario file based on the schedule information of the schedule file designating the time for displaying the advertisement, and the scenario of the scenario Since the image information is displayed based on the information, an accurate advertisement can be displayed.

  According to the invention described in claim 11, since the portable recording medium stores the operation setting information for setting the operation of the display control unit according to the use type of the railway vehicle, Based on this, it is possible to display the advertisement efficiently by controlling the image information to be sent to the image display unit.

It is a figure which shows the mode of the image display apparatus connected with the low speed network (low speed line) and the high speed network (high speed line) in a rail vehicle. It is an internal block diagram of an image display apparatus. A file structure recorded in a flash memory (SD card). It is a figure which shows a mode that image information is delivered from a master to a slave. It is operation | movement explanatory drawing of a master mode. It is operation | movement explanatory drawing of a slave mode. It is a block diagram of a scenario file. It is a block diagram of a schedule file. It is an operation | movement setting file block diagram. It is operation | movement explanatory drawing of an image display.

  Hereinafter, the invention will be described in detail using an example applied to a railway vehicle as an embodiment with reference to the drawings. FIG. 1 shows how image information is distributed to a plurality of image display devices installed in a vehicle. Although only one vehicle is displayed in FIG. 1, of course, a plurality of vehicles may be connected. As shown in FIG. 1, the railway vehicle 101 is provided with doors 101R to 104R on the right side surface and doors 101L to 104L on the left side surface. A small operation information display device 111 (111a, 111b, 111c, 111d) is installed above the doors 101R, 102L, 103R, 104L in the guest room, and above the doors 101L, 102R, 103L, 104R in the guest room. Are provided with large operation information display devices 112 (112a, 112b, 112c, 112d).

  On the operation information display devices 111 and 112, the destination of the railway vehicle 101, the stop station, and the like are displayed. The operation information display devices 111 and 112 obtain operation information as a part of vehicle information from the display setter 110 to be described later via the network 113 which is a vehicle line, and write a destination or stop station included in the operation information as characters. And images are displayed in the cabin to the passengers.

  The display setting device 110 is installed in the leading vehicle, for example, operation information that is information on the operation of the railway vehicle 101 such as a destination, a stop station, a type, and a point where the railway vehicle 101 (the relevant organization) is currently located, and others. Control information and the like of the railway vehicle 101 are output as vehicle information to the low-speed network 113 serving as a vehicle line.

  The low speed network 113 transmits the operation information output from the display setting device 110 to the small operation information display device 111 and the large operation information display device 112. The low-speed network 113 transmits information related to the control of the railway vehicle 101 such as operation information. The image display apparatuses are connected to each other via a high-speed network 114 realized by Ethernet (registered trademark).

  The image display device according to an embodiment of the present invention is installed side by side with the operation information display devices 112a, 112b, 112c, and 112d above the doors 101L, 102R, 103L, and 104R in the cabin.

  FIG. 2 shows the configuration of the image display apparatus. The power supply device 1 converts AC100V or DC100V supplied in the vehicle into DC12V used in the image display device. An image is displayed on a liquid crystal display (LCD) 13 using an LCD screen. However, the image display is not limited to an LCD, and a plasma display, an organic EL (Organic Light Emitting Diode), or the like may be used. good. The input to the liquid crystal display serving as the image display unit is a digital signal, for example, transmitted by LDVS (Low voltage differential signaling).

  A unique signal is input to the liquid crystal display 13 according to the size and the arrangement of the display elements. Image information from the display control unit 14 is converted by the image conversion unit 12 in accordance with the standard of the display unit. The image information is a DVI (Digital Visual Interface), an interface standard for connecting a computer and a display, which is a general-purpose image information transmission system, from the display control unit 14 in which the SD card 15 is inserted, and the LCD image converter 12. Sent to.

  The display control unit 14 includes a memory in which software for controlling the entire image display apparatus is stored and a CPU that performs processing based on the software. The outside is connected to the operation information display device 112 connected to the low-speed network 113 which is a vehicle line through an RS485 interface. Further, they are connected by Ethernet (registered trademark) which is a high-speed line 114. The display control unit 14 is indirectly connected to the vehicle line via the operation information display device 112 and is directly connected to Ethernet (registered trademark). Of course, the display control unit 14 may be directly connected to the low-speed line 113.

  Each image display apparatus installed in the vehicle has a unique apparatus ID, and monitoring and maintenance of the apparatus are performed for each apparatus ID. The device ID is calculated from the car number in the SDR (Status Data Request) packet from the operation information display device connected by the RS485 interface and the part information indicating the position in the vehicle. As shown in Table 1, the device ID is assigned with the car numbers 1 to 15 in the upper 4 bits. Also, a value (0 to 15) corresponding to a part indicating a position in the vehicle is entered in the lower 4 bits. A value indicating a part and a part in the vehicle is arbitrary if determined in advance. If the SD card 15 is not inserted, the default is car number = 1 and part information = 1.

  For example, in the case of an image display device with No. 3 and 10 parts, device ID = high order 4 bits (car number −1) + low order 4 bits (10) = Hex (3-1) + HexA = Hex2 + HexA = Hex2A Is expressed as 00101010.

  Next, generation of an IP (Internet Protocol) address will be described. There is a setting file (Common.Ini) in the SD card 15, in which a network address (192.168.2.0) and a subnet mask (255.255.255.0) are recorded.

  The image display device calculates its own IP address as follows. Each image display device has a unique device ID as shown in Table 1 based on the car number and the position in the vehicle. Each image display apparatus acquires the network address to which it belongs from the setting file. Then, the IP address of the image display device is calculated as network address + device ID.

  For example, in the case of an image display device of No. 3 car with 10 parts, Hex display and the lower 8 bits are 2 = Hex2 (0010) and 10 = HexA (1010), so the lower 8 bits are 00101010 decimal. 42 in terms of the law. Therefore, the IP address of this image display device is network address (192.168.2.0) + device ID (0.0.0.42) = 192.168.2.42.

  Since each image display device of each vehicle has a unique IP address as described above, a network using this IP address can be configured. Information exchange on a high-speed line is performed by using Ethernet (registered trademark) as a data link layer and using IP on the data link layer.

  Next, a file recorded in the SD card 15 which is a portable recording medium inserted into the image display device shown in FIG. 3 will be described. MS-update is stored in the Contents folder as update information for operating as a master. The image display apparatus in which the SD card 15 having the MS-update file is inserted recognizes the MS-update file, starts as a master, and operates as a master that distributes new image information. The image display device in which the SD card 15 having no file is inserted operates as a slave that receives new image information from the master image display device. The file in the SD card 15 will be described later in detail.

  In the SD card having the MS-update file, as the latest version of image information and display / distribution information, the version information of the image information, the number of image display devices installed in the vehicle, and information on the address as necessary The part information or IP address that is may be recorded. The state in which the latest version of the image information is distributed to the image display device as another slave and the image information is updated will be described with reference to FIG. Each image display device is connected to an adjacent image display device by Ethernet (registered trademark), which is a high-speed network capable of transmitting image information, as indicated by a dotted line in FIG. The Ethernet (registered trademark) terminal of each image display device has a function of a switching hub that is not limited by the number of connection stages, and learns the MAC (Media Access Control) address of the image display device to which the image display device is connected. The above-described IP address is used for exchanging information.

  The flow of information between image display devices will be described with reference to FIG. In Step 1, (1) the SD card is inserted into the image display device. (2) The image display device in which the SD card 15 is inserted is activated and starts operating. (3) The image display device checks the file recorded on the SD card 15 and recognizes the MS-update file as update information, and operates as a master. As a file structure, update information may be included in a folder of image information. Since the MS-update file includes information regarding the number of image display devices serving as slaves to which image information is distributed and addresses as necessary, the master image display device is responsible for the overall distribution of image information. Management.

  In order to know the version of the image information of the image display devices (LCDs 2 to 4) that become slaves, the image display device (LCD 1) that becomes the master inserts the SD card 15 that does not include other MS-update files. 4) Broadcast a Check packet that is a check packet for inquiring about the status of another image display device including the version information of the image information recorded on its own SD card 15.

  Other image display devices (LCD2, LCD3, LCD4) in which the SD card 15 that does not include the MS-update file is inserted operate in a slave mode to be described later. Other image display devices (LCD2, LCD3, LCD4) that have received a check packet from the master image display device (LCD1) are (5) a new one containing version information of its own image information after a random delay time. A Need packet, which is a packet for needs meaning a request for apparent image information, is sent back to the master image display device (LCD 1) by unicast. The order of the image display devices that returned the Need packet (needs packet) in FIG. 4 is LCD4, LCD2, LCD3 because of a random delay time.

  Next, the operation of Step 2 in FIG. 4 will be described. Note that the display in the figure is an abbreviation lacking some characters. In order to synchronize the image information, the master image display device (LCD1) (1) transmits the SyncStart packet by unicast to the image display device (LCD4) that first returned the Need packet. Here, Sync is an abbreviation for Synch.

  In the image display device (LCD 4) that has received the SyncStart packet addressed to itself, the version of the image information is compared. (2) A folder having a version older than the version of the image file possessed by the master image display device (LCD 1), in this case, “20130301” is deleted. Here, “20130301” indicates the version of the folder. This deletion may be performed remotely by the image display device (LCD1) as a master or by the image display device (LCD4) as a slave.

  Since the transmission of image information sends the difference between the image information of each of the master and slave image display devices, (3) an uploading file is created in the slave image display device in order to record the transmission state. Rewritten at any time to reflect the transmission status.

  The image display device (LCD 4) that has received the SyncStart packet returns (4) a SyncStartRes packet to the image display device (LCD1) as a master by unicast. Here, Res is an abbreviation for Response.

  The image display device (LCD1), which is the master that has received the SyncStartRes packet, transmits the new image information that it has as a difference by unicast using (5) File Transfer Protocol (FTP). (5) A new image information file “20130501” is created in the image display device (LCD 4) that has received the image information by FTP.

  When the image information difference disappears and the version of the image information of the master image display device (LCD1) and the version of the image information of the slave image display device (LCD4) match and synchronize, (6) the master image display The SyncStop packet is sent from the device (LCD 1) to the slave image display device (LCD 4).

  In the image display device (LCD 4) as the slave, (7) the uploading file in which the transmission state of the image information has been recorded is deleted after its role.

  A SyncStopRes packet is sent from the image display device (LCD 4) that is a slave that has finished a series of synchronization operations to the image display device (LCD 1) that is a master. (8) The image information synchronization operation ends.

  Next, the temporal transition of the operation state of the image display apparatus operating in the master mode will be described with reference to FIG. Initially, all image display apparatuses start operating in the slave mode (S0). The presence / absence of an MS-update file in the inserted SD card 15 is confirmed (S1).

  If there is no MS-update file in the SD card 15 inserted in the image display device, the image display device performs an operation in the slave mode shown in FIG. If there is an MS-update file, the image display device starts operating in the master mode (S11).

  The image display apparatus that has started operating in the master mode broadcasts a Check packet including the version information of its own image information in order to check the version of the image information of another image display apparatus (S12). The transmission of the Check packet is repeatedly performed at predetermined time intervals.

  The image display apparatus that has received the Check packet returns a Need packet that is a need packet including version information of its own image information. The return timing is performed after a random delay in order to avoid packet collision.

  The image display apparatus that is the master that has received Need examines the contents of the Need packet (S2). Then, in order to start the synchronization operation, the SyncStart packet is transmitted by unicast to the image display apparatus that first returned the Need packet (S22).

  In response to this, the image display device that has received the SyncStart packet returns a SyncStartRes packet, so that the master image display device waits for the arrival of this SyncStartRes packet (S4). If the SyncStartRes packet does not arrive during a waiting time of 5 seconds for some reason, for example, it returns to Wait for Need packet (S2) with Time-Out.

  When the SyncStartRes packet arrives within the waiting time of 5 seconds, the master image display apparatus establishes a session for performing FTP with the image display apparatus that has returned the SyncStartRes packet (S41).

  FTP is performed for each version of image information, and it is confirmed whether one version ends without error (S6). If an FTP error occurs during transmission of image information with a large amount of information and the problem cannot be resolved within 60 seconds, for example, it becomes Time-Out, and the flow returns to waiting for a Need packet (S2).

  Next, it is determined whether or not image information (content) to be transmitted is still necessary (S6). If there is untransmitted image information and transmission is necessary, the FTP operation is performed again (S5). If all contents have been transmitted, the session with the image display apparatus that has returned the SyncStartRes packet is disconnected (S61). Then, a SyncStop packet notifying that the synchronization operation has been completed is sent to the image display apparatus that has been establishing the FTP session so far (S62).

  The image display apparatus that has received the SyncStop packet addressed to itself returns a SyncStopRes packet in response thereto. The master image display device waits for, for example, a SyncStopResp packet for 5 seconds (S7). If no SyncStopRes packet arrives during this time, it returns to Wait for Need / Check packet (S2) at Time-Out. If a SyncStopRes packet comes within 5 seconds, the process again returns to the Need / Check packet wait (S2).

  The image display device as a master waits for a Need packet requesting image information update from an image display device that has not established an FTP session until now (S2). Here, when a new Need packet is received, the image information of the difference between the image information held by itself and the image information held by the image display apparatus that has returned the Need packet is entered into the operation of transmitting by FTP.

  When a Check packet that means a synchronization confirmation packet is received while waiting for a Need / Check packet (S2), the image display device that has transmitted the check packet is recorded in the Check packet database (S23). Here, the Check packet from the slave image display device is a synchronization confirmation packet that means that the image information of the master image display device and its own image information are synchronized.

  The master image display device checks whether or not a Check packet indicating synchronization confirmation has arrived from all the image display devices (S3), and if there is an unreceived image display device, Wait for a Check packet (S2).

  When the check packet, which is a synchronization confirmation packet from all the image display devices, is received, the image information of all the image display devices in the vehicle is synchronized with the master image information. A certain image display apparatus stops the repeated transmission of the Check packet (S31). Then, in order to enter the end operation, the Finish packet is transmitted to another image display device that is a slave by unicast (S32).

  The image display device that is the slave that has received the Finish packet returns a FinishRes packet as a response to the image display device that is the master.

  The master image display apparatus waits for the FinishRes packet (S8). For example, if there is no response after waiting for 5 seconds, a Finish packet is transmitted again (S32).

  The image display device that is the master that has received the FinishRes packet records the returned image display device in the FinishRes database. Then, it is checked whether or not a FinishRes packet has arrived from all the image display devices (S9).

  If there is an unreceived FinishRes packet, the Finish packet is transmitted again to the unreceived image display device (S32).

  When the master image display device confirms the FinishRes packet from all the slave image display devices, the master device then transmits a SyncReset packet for stopping the function as a master to each slave image display device (S91). The image display device that has received the Sync Reset packet returns a Sync Reset Res packet.

  The master image display device waits for a SyncResetRes packet from each slave image display device (S10). If the packet does not come within 5 seconds, for example, the SyncReset packet is transmitted again as Time-Out (S91). ).

  When the SyncResetRes packet is received, the information of the image display device that has returned the SyncResetRes packet is recorded in the SyncResetRes database (S101).

  If there is an image display device that has not transmitted the SyncResetResponse packet, the SyncReset packet is transmitted again (S91).

  Having received the SyncResetRes packet from all the slave image display devices, the master image display device finishes its role, deletes the MS-update file recorded on its own SD card 15, and returns to the slave mode ( S111).

  In FIG. 5, an image display device that does not have an MS-update file among files recorded on the SD card 15 operates in the slave mode. A time transition of the operation of the image display apparatus operating in the slave mode will be described with reference to FIG.

  In slave mode, it waits for a Check packet from the master (S13). When the Check packet is received, the version of the image information possessed by the master in the Check packet is compared with the version of the image information possessed by itself, and if there is a mismatch, the presence of an old version not present in the master is checked (S15).

  If an old version exists, the directory is deleted and its own version information (content version status) is also changed (S151).

  Next, in order to request an update of the image information, a Need packet including the version information (content version status) of the image information of itself is returned to the master image display device (S152).

  It waits for a SyncStart packet that signifies the start of a synchronous operation for sending a difference in image information from the master (S16). For example, if a SyncStart packet does not come within 5 seconds, it becomes Time-Out, and the process returns to waiting for the first check packet (S13).

  When a SyncStart packet is received, a SyncStartRes packet is returned as a response thereto. The master image display apparatus confirms this, establishes a session necessary for FTP, and starts the FTP operation.

  If an error occurs during the FTP operation and, for example, it does not recover even after waiting for 60 seconds, it becomes Time-Out and returns to waiting for a check packet (S13).

  When the transmission of the difference image information is completed, the master image display apparatus disconnects the session and sends a SyncStop packet. For example, if a SyncStop packet does not come after waiting for 65 seconds after session disconnection, it becomes Time-Out and waits for a Check packet (S13).

  When a SyncStop packet from the master is received, a SyncStopRes packet is returned as a response to this, and the FTP operation ends.

  When synchronization is established, the check packet from the master is first received and the version of the master image information is compared with the version of your own image information. It transmits repeatedly (S141).

  Since the master image display device transmits a Finish packet when the image information synchronization with all the slave image display devices is completed, the image display device in a state of being synchronized with the image information of the master image display device Then, it waits for a Finish packet from the master image display device (S18).

  The image display apparatus that is the slave that has received the Finish packet returns a FinishRes packet (S181).

The master image display device that has received the FinishRes packet from all the slave image display devices transmits a SyncReset packet indicating the end of the synchronization operation.
Therefore, the slave image display apparatus waits for reception of the SyncReset packet and the Finish packet (S19).

  For example, when 5 seconds elapse, it becomes Time-Out and returns to the reception of the Finish packet (S18). When the Finish packet is received, the reply of the FinishRes packet (S181) is repeated.

  The image display device that is the slave that has received the SyncReset packet returns a SyncResetResent packet (S191).

  Next, various files including image information recorded on the SD card 15 will be described.

  As is well known, the SD card 15 is a readable / writable portable recording medium formed in a card shape and incorporating a nonvolatile semiconductor memory. The SD card 15 stores image information such as moving image information and still image information, a scenario file, a schedule file, and the like. In the present embodiment, the SD card 15 is described as a portable recording medium. However, the memory card is not limited to the SD card, and may be a memory card of another type, or a portable type such as a USB (Universal Serial Bus) memory, a hard disk, or an optical disk. It may be a recording medium.

  FIG. 3 shows an example of the file structure in the SD card 15. In the SD card 15 (SD Card), folders (directories) for contents (contents), firmware (firm), logs (log), and settings (setting) are formed.

  In the content folder, folders of CM, news (NEWS), and emergency (EMAEGENCY) are formed. In addition, an MS-update file is recorded on the SD card inserted into the master image display device.

  The CM folder stores the moving image information (advertisement moving image information) of the advertisement to be displayed on the LCD display 13, scenario information, and schedule information, and a folder is formed for each version. In the example of FIG. 3, two folders of “20130301” (version α) and “20130301” (version β) are formed.

  In a folder formed for each version, for example, a “20130301” folder, a source folder is formed. ini-10. ini 10 scenario files and schedule. One schedule file of ini is stored. In the source folder, a plurality of pieces of advertisement moving image information (AAAAA.h264 to DDDDD.h264) are stored. This advertising video information is, for example, H.264. It is encoded according to the H.264 standard. That is, the advertisement moving image information becomes image information. Of course, the image information is not limited to moving image information but may be still image information.

  The scenario file as scenario information is a file in which the display order of each moving image information stored in the source folder, the display point, and the like are set. The schedule file as schedule information is a file in which time zones for executing a plurality of scenario files are set.

  An example of a scenario file is shown in FIG. FIG. 7 is a diagram showing the 1. shown in FIG. It is an example of ini. The scenario file includes the target advertising video information name (file name), the identification (type) of the type of advertising video information or news video information, and the number of repeated display of the advertising video information indicated by the file name (number of times Time), a position to be displayed (display position), and a point to be displayed (display point).

  In the case of the example in FIG. 7, “1” indicates an advertisement and “2” indicates news. The display position is information (position information of the image display device in the railway vehicle 101) that specifies which image display device to display among the plurality of image display devices shown in FIG. The display device can make a determination based on its own installation position information transmitted in advance included in the operation information output from the display setting device 110. For example, when the position of the image display device provided on the upper part of the door 101L is “11” and the display position includes “11”, the advertisement moving image information specified in the file name is displayed.

  The display point is information for specifying a point for displaying the advertisement moving image information specified by the file name. In FIG. 7, the point is specified by the point code. The point code is information output by the display setter 110 included in the operation information. For example, information indicating a specific position or a specific range of position such as a station or a section between stations is encoded. Is. When the point code included in the operation information matches the setting of the display position, the image display device displays the advertisement moving image information specified in the file name. It should be noted that other methods may be used as long as the information indicates a point for displaying advertisement moving image information such as latitude and longitude instead of a point code.

  In the scenario file, the above five items are set for one piece of advertising moving image information, and are described in the order in which they are displayed. In the case of FIG. h264, BBBBB. h264, CCCCC. h264, DDDDD. They are displayed in the order of h264. After the last file (DDDDD.h264) is displayed, the display is performed again from the first file (AAAAA.h264). That is, the order in which a plurality of moving image files (image information) are displayed as images on the LCD display 13 (image display unit) is set.

  In addition, when “−” is written in the display position and the display point in FIG. 7, it indicates that the display is performed at all positions and all points.

  Next, an example of a schedule file is shown in FIG. In the schedule file, the name of the target scenario file, the start time (start time) of the scenario as information related to the execution time of the scenario information, and the end time (end time) of the scenario are described. Yes. In the schedule file, a start time and an end time are set for each scenario file. That is, the schedule file (schedule information) includes the execution start time and execution end time of the scenario file (scenario information).

  The emergency folder stores still image information (may be moving image information) to be displayed on the LCD display 13 in an emergency.

  The firmware folder stores data for updating firmware that operates in the display control unit 14.

  In the log folder, a play folder and an error (err) folder are formed.

  In the play folder, a log file of the number of times of reproduction of advertisement moving image information is stored. In the log file, for example, the reproduced advertisement moving picture information name and the reproduction date / time are recorded in the order of the reproduction date / time. Therefore, for example, the number of times of reproduction of the advertisement moving image information is found by searching the log file with a specific advertisement moving image information name. That is, the SD card 15 (portable recording medium) stores information related to the reproduction history of the advertisement moving image information (image information).

  The error folder stores a log file of errors that occurred during operation. In the log file, for example, the ID of the error that occurred, the date and time of occurrence, and the date and time of occurrence are recorded.

  The setting folder stores a setting file (common.ini) in which various settings of the image display device are described and an operation setting file (operation.ini) in which an operation according to the type and destination is set.

  The setting file includes items such as the above-described device ID for identifying a plurality of image display devices, and setting of the time used as a reference for switching image information to be displayed (for example, 3:00 am instead of 0:00 am). Can be set.

  An example of the operation setting file is shown in FIG. In the operation setting file, the destination and the operation are described for each type. In FIG. 9, “#” and subsequent figures indicate comments. For example, in FIG. 9, “00” in the line where “type 1 (forwarding)” and a comment are written is a code (type code) indicating the type, and indicates forwarding as indicated by the comment. The type code is a code set in advance based on the type of route on which the railway vehicle 101 travels, and is output from the display setter 110 in the operation information.

  “00” = “0” in the next line indicates the destination and the operation. The left side (“00”) of this line is a destination code, and the right side (“0”) is an operation code. The destination code is a code set in advance based on the destination of the route on which the railway vehicle 101 travels, and is output from the display setter 110 in the operation information. The operation code is a code for designating the operation of the image display device. For example, “0” is not displayed, “1” is normal display based on the scenario file and the schedule file, “2” is display of the default image 1, “ 3 ″ is defined as the display of the default image 2 or the like. The default images 1 and 2 are still image information (may be moving image information) included in a default image folder (not shown in FIG. 3). The display control unit 14 operates based on the operation code. That is, the operation of the display control unit 14 (display control unit) is set according to the type.

  Next, the display operation of the advertisement moving image information in the image display apparatus having the above-described configuration will be described with reference to FIG. The flowchart of FIG. 10 is executed by the display control unit 14.

  First, in step S101, it is determined whether display ON or display OFF is received from the display setting device 110 via the operation information display device 112 via the RS-485 interface. If display OFF is received, the process proceeds to step S102. Advances to a non-display state.

  On the other hand, if display ON is received, the process proceeds to step S103, where the type (type code), the destination (destination code), and the operation setting file are confirmed, and the operation code of the corresponding type code and destination code is “0”. Advances to step S102 and is in a non-display state. If the operation code is “1”, the process proceeds to step S103. If the operation code is “2” or more, the process proceeds to step S105 to display a default screen designated in advance. In this step S103, it is determined according to the setting corresponding to the type code and the destination code acquired through the operation information display device 112 as operation information among the settings described in the operation setting file. That is, based on the operation setting file (operation setting information), it is determined whether or not to perform an operation using a schedule file (schedule information) and a scenario file (scenario information).

  Next, in step S104, the date and the trigger version are confirmed. If there is no corresponding version, the process proceeds to step S105, and a default screen designated in advance is displayed. The default screen is often a still image and is displayed in the still image mode. The trigger version indicates a folder name formed in the CM folder in FIG. For example, in the case of “20130301”, the folder stores moving image information and the like to be displayed after March 1, 2013. Also, as shown in FIG. 3, when there are two folders (versions) “20130301” and “20130401”, the period from March 1, 2013 to March 31, 2013 is “20130301 #”. After April 1, 2013, the moving image information in the “2013031” folder is displayed.

  In the determination in step S <b> 104, a date is acquired from the clock function built in the image display control unit 14, and it is determined whether the acquired current date is within the date range indicated in the trigger version in the SD card 15.

  Next, if there is a corresponding version, the process proceeds to step S106, and the time table of the time and schedule file is confirmed. If there is no scenario file corresponding to the time, the process proceeds to step S105, and a default screen designated in advance is displayed. To do.

  The confirmation of the time in the step S106 and the time table of the schedule file is to check whether the current time is included in the start time to the end time set in the schedule file. Select a scenario file that has its start time and end time set. As for the current time, it is only necessary to acquire time information attached to the date and time acquired when checking the date and time in step S104. That is, the scenario file (scenario information) is selected based on the schedule file (schedule information) and the current time.

  If there is a scenario file corresponding to the time, the process proceeds to step S107. In step S107, the corresponding scenario file is confirmed. If there is no corresponding scenario file, the process proceeds to step S105, and a default screen designated in advance is displayed. In step S107, an operation for reading the scenario file described in the schedule file confirmed in step S106 from the SD card 15 is performed. That is, there is no corresponding scenario file when there is a description in the schedule file but it is not stored in the SD card 15. For example, there is a description mistake in the schedule file, a mistake in the scenario file name, or the SD card 15 A work mistake that causes the file to be stored in is suspected.

  Next, if there is a corresponding scenario file, the process proceeds to step S108, where the advertisement video information called in the scenario file is confirmed. If there is no advertisement video information (video file), the process proceeds to step S109, and in advance as in step S105. The designated default screen is displayed, and the process advances to step S1011. In step S108, an operation for reading from the SD card 15 a moving image file that matches the setting described in the scenario file confirmed in step S107 is performed. That is, the absence of a moving image file is a case where the scenario file is described but is not stored in the SD card 15. For example, a scenario file description error, a moving image file name error, or a file on the SD card 15 is stored. Suspected work mistakes to remember

  In this step S108, based on the point code (the current position) output from the display setter 110 as the operation information and the own installation position information (the own installation position), the corresponding video is described from the description of the scenario file. The moving image file of the image information file is read from the SD card 15 by specifying the file setting. That is, the moving image file (image information) is selected based on the scenario file (scenario information) and the operation information.

  If there is a moving image file, the process advances to step S1010 to display the moving image file read out in step S108 on the LCD display 13 in the moving image mode. That is, the corresponding moving image file is read from the SD card 15, decoded, and output to the LCD signal conversion unit 12 via the DVI. The LCD signal conversion unit 12 converts the image signal specified by LVDS and outputs the image signal to the LCD display 13 to display a moving image file (advertisement moving image information).

  Next, in step S1011, the end of the scenario file is confirmed. If there is a continuation, the process returns to step S108, and if it is ended, the process returns to step S105. For example, in the case of FIG. 3, AAAAA. After displaying h264, the process returns to step S108 and the next BBBBB. h264, and DDDDD. After H.264 is displayed, the process returns to step S5 and is executed again after confirming the schedule file.

  In the flowchart shown in FIG. 10, when display ON or display OFF is received via the RS-485 interface while the part enclosed by A is being executed, the flowchart is ended. When the display is ON, the display ends after the display of the moving image file being displayed. When the display is OFF, the display ends forcibly without waiting for the end of the moving image file.

  According to this embodiment, in each image display device, the display control unit 14 acquires the operation information of the railway vehicle 101, and the advertisement moving image information to be displayed on the liquid crystal display 13 based on the acquired operation information is an SD card. 15 is read out. In this way, the advertisement moving picture information corresponding to the operation information is read from the SD card 15 and displayed on the liquid crystal display 13. This advertisement moving image information is always kept up-to-date by synchronizing with the image information of the master image display device. And if operation information can be acquired from the exterior, image information, such as advertisement animation information, can be displayed on liquid crystal display 13 based on operation information.

  Since update information is stored when there is new advertising video information on a portable recording medium such as the SD card 15, all the images in the vehicle can be displayed simply by replacing the SD card 15 of one image display device. The advertisement moving image information displayed on the apparatus can be changed, and the updating operation can be simplified.

  Moreover, a point code and its own installation position information are acquired as operation information, and the display control unit 14 is based on the acquired point code and its own installation position information, and the display point and display position described in the scenario file. The advertisement moving image information is read from the SD card 15 and displayed on the liquid crystal display 13. By doing in this way, the advertisement video information displayed according to the point where the railway vehicle 101 is currently located and the installation position of the image display device can be changed, and an advertisement suitable for the point and the position can be displayed. . Therefore, an effective advertisement can be made.

  In addition, the display order of the plurality of advertisement moving image information is set in the scenario file, and the display control unit 14 reads out the scenario file and displays the advertisement moving image information on the liquid crystal display 13 in the set order. . By doing in this way, the order in which a plurality of advertisement animation information is displayed can be set up beforehand. Further, since the scenario file is stored in the SD card 15 together with the advertisement moving image information, the display order can be changed only by changing the contents of the SD card 15. Further, the scenario file can be easily managed by storing it in the same SD card 15 as the advertisement moving image information to be displayed.

  In addition, since the number of times that the advertisement video information is repeatedly displayed is set in the scenario file, one advertisement video information can be continuously displayed a plurality of times.

  In addition, the scenario file includes an execution start time and an execution end time, and the display control unit 14 reads the schedule file and includes the scenario included in the execution end time from the set execution start time. Running the file. In this way, the time for executing the scenario file can be set in advance. Further, since the schedule file is stored in the SD card 15 together with the advertisement moving image information and the scenario file, the time for executing the scenario file can be changed only by changing the contents of the SD card 15. In addition, the schedule file can be easily managed by storing it in the same SD card 15 as the advertisement moving image information and the scenario file to be displayed.

  Further, since the schedule file and the scenario file are stored in the SD card 15 as individual files, only the file including the information to be changed can be corrected. For this reason, since the correction range is limited, the correction becomes easy and it is difficult to make mistakes.

  Also, information indicating whether normal display or non-display or default image display is set for each type of railway vehicle 101 is set in the operation setting file, and the display control unit 14 reads the operation setting file, An operation based on the setting corresponding to the usage type and the destination acquired as the operation information is performed. In this way, it is possible to set whether to execute the scenario file or schedule file in advance or perform another operation according to the type such as express or normal. In addition, since the operation setting file is stored in the SD card 15 together with the advertisement moving image information, the scenario file, and the schedule file, the scenario file and the schedule file in the SD card 15 can be executed only by changing the contents of the SD card 15. Can be changed. Moreover, management of the operation setting file is facilitated by storing the advertisement moving image information, the scenario file, and the schedule file to be displayed in the same SD card 15.

  Further, since the operation setting file is an individual file, only the file containing the information to be changed can be corrected. For this reason, since the correction range is limited, the correction becomes easy and it is difficult to make mistakes.

  In the above-described embodiment, the display of an advertisement (CM folder) has been described, but news (news folder) can be similarly operated by setting a scenario file and a schedule file.

  In the above-described embodiment, the scenario file and the schedule file are separate files, but may be a single file. Alternatively, the operation setting file may be combined into one file.

  A destination item may be added to the scenario file. That is, it is possible to set whether to display image information according to the destination. Alternatively, an item of type may be added to the scenario file. In this case, whether or not to display image information can be set according to the type such as express or normal.

  Further, the current date and time are acquired from the clock function built in the display control unit 14, but the display setting device 110 outputs the time information to the network 113 as common time information, and the image display device displays the time information. You may make it acquire via the operation information display apparatus 112. FIG.

  The present invention is not limited to the above embodiment. That is, those skilled in the art can implement various modifications in accordance with conventionally known knowledge without departing from the scope of the present invention. Of course, such modifications are included in the scope of the present invention as long as the configuration of the image display apparatus of the present invention is provided.

101 Rail vehicle 101R, 102R, 103R, 104R Right door 101L, 102L, 103L, 104L Left door 110 Display setting device 111 Small operation information display unit 112 Large operation information display unit 113 Low speed network (line) Vehicle line 114 High speed network (line Ethernet (registered trademark)
DESCRIPTION OF SYMBOLS 1 Image display apparatus 12 LCD signal conversion part 13 LCD display (image display part)
14 Display control unit 15 SD card (portable recording medium)

Claims (11)

One of a plurality of image display devices connected via a network,
Read the image information recorded in the portable storage medium to be inserted and the display / distribution information necessary for display and distribution of the image information,
When the update information is included in the display / distribution information, the image information stored in the portable storage medium is distributed to another image display device based on the display / distribution information by becoming a master,
Or, if there is no update information, it becomes a slave and receives image information distributed by the master and records it in the portable storage medium,
An image display device for displaying image information recorded in the portable storage medium.   Based on the update information, the master image display device transmits a check packet including version information of the image information recorded in the portable storage medium to the slave image display device. The need packet according to the contents of the need packet including version information of the image information of the slave image display device returned from the slave image display device that has received the check packet. The image display device according to claim 1, wherein the image information that the device itself has is transmitted to the image display device that has returned the message.   The image display device that is the slave compares the version information of the image information included in the check packet distributed from the image display device that is the master with the version information of the image information that the image display device has. When the information is synchronized, a synchronization confirmation packet including the version information of the image information held by itself is distributed to the master image display device and the other slave image display device. The image display device according to claim 1.   The master image display device receives the synchronization confirmation packet from the slave image display device, and the synchronization confirmation packet from all the slave image display devices based on the display / distribution information. 4. The image according to claim 3, wherein the distribution of the image information is terminated when the synchronization confirmation packet is received from all the slave image display devices. Display device.   The image display device is directly or indirectly connected to a vehicle line for transmitting vehicle information and installed in a railway vehicle, and the number of the railway vehicle installed by itself via the vehicle line and the railway vehicle The device ID is received, and the device ID is generated from the car number and the location information. Further, the IP address is generated by a predetermined method based on the device ID, and the IP address is used to 5. The image display apparatus according to claim 1, wherein information exchange is performed with the image display apparatus.   The image display device has a moving image mode for displaying a moving image and a still image mode for displaying a still image, and switching of the mode and ON / OFF switching of image display are performed via the vehicle line. The image display device according to claim 5, characterized in that:   The image display device according to claim 5 or 6, wherein a state is monitored via the vehicle line and a packet for controlling the state and operation is received.   The portable storage medium includes an image information file in which image information to be displayed is stored, a scenario file including scenario information in which a plurality of scenarios describing the order in which the image information in the image information file is reproduced, and time 6. A schedule file including schedule information in which a time table for changing a scenario among the plurality of scenarios according to a band is included, and a log file that records a history of reproduction of image information. 8. The image display device according to any one of 7.   In the scenario file, the name of the image information as scenario information, the position information of the image display device that displays the image information in the railway vehicle, the point where the image information is displayed, and the image information are repeated. The image display apparatus according to claim 8, wherein the number of times to display is included.   The image display device according to claim 8, wherein the image display device displays the image information based on operation information acquired via a vehicle line, the schedule information, and the scenario information. The portable storage medium stores operation setting information for setting the operation of the image display device in accordance with the type of use of the railway vehicle, and the image display device receives information on the railway vehicle as operation information from the vehicle line. Acquires the application type, and reads the operation setting information together with the image information, the schedule information, and the scenario information from the portable storage medium,
The image display device according to claim 8, wherein the image information is displayed based on the operation information, the schedule information, the scenario information, and the setting information.

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