JP4909502B2 - Broadcast receiver for vehicles - Google Patents

Description

  The present invention relates to a broadcast receiver used by being mounted on a vehicle, and more particularly to a vehicle broadcast receiver that receives various contents and its own rewrite program by broadcasting.

  A system is known in which upgrade data provided by digital broadcasting such as satellite broadcasting or terrestrial broadcasting is received by an in-vehicle terminal mounted on a vehicle and a program of the in-vehicle terminal is updated (Patent Document 1). In this system, various data such as version upgrade data to be broadcast is stored in an information service station installed separately from the vehicle, and from the information service station to the in-vehicle terminal in response to a request from the in-vehicle terminal. to download. In this way, even when the upgrade data is broadcast and cannot be received by the in-vehicle terminal, the upgrade data necessary for the user can be obtained.

JP 2001-53699 A

  The system disclosed in Patent Document 1 requires special equipment installation like an information service station, and is not necessarily an optimal method in terms of cost. Therefore, there is a need for a method that can obtain data used for updating a program of equipment mounted on a vehicle without requiring special equipment.

The broadcast receiver for a vehicle according to the invention of claim 1 is a broadcast receiver mounted on a vehicle, and broadcasts rewrite data for rewriting a program of the broadcast receiver itself and information on a scheduled broadcast time of the rewrite data. Receiving means for receiving by waves, current position detecting means for detecting the current location of the vehicle, destination setting means for setting the destination of the vehicle, route setting means for setting a recommended route from the current location to the destination, broadcast waves Based on the present location, current time, destination, recommended route, receivable region, and scheduled broadcast time, the vehicle area can be selected from a plurality of instruction contents . According to the instruction determination means for determining the instruction contents and the instruction contents determined by the instruction determination means, the reception scheduled point where the vehicle is located at the scheduled broadcast time can be received. As the area in which and a instructing means for instructing to the driver of the vehicle.
According to a second aspect of the present invention, in the vehicular broadcast receiver according to the first aspect, the instruction determining means determines the instruction content so as to receive the rewritten data during traveling.
According to a third aspect of the present invention, in the broadcast receiver for a vehicle according to the second aspect, the instruction determining means is such that the vehicle is traveling on the recommended route at the scheduled broadcast time, and the planned travel point at that time is within the receivable area. In some cases, the instruction content is determined so as to receive the rewrite data while traveling.
According to a fourth aspect of the present invention, in the vehicular broadcast receiver according to the second or third aspect, the instructing means displays a road map of the recommended route, and further displays a reception planned zone for receiving rewritten data in the middle of the recommended route. This is to give an instruction.
According to a fifth aspect of the present invention, in the vehicular broadcast receiver according to the first aspect, the instruction determining means determines the instruction content so as to receive the rewritten data at the current location.
According to a sixth aspect of the present invention, in the vehicle broadcast receiver according to the fifth aspect, the instruction determining means determines the instruction content so that the rewritten data is received at the current location when the scheduled broadcast time is within a predetermined time from the current time. To do.
According to a seventh aspect of the present invention, in the vehicular broadcast receiver according to the fifth or sixth aspect, the instruction means displays an explanation to instruct the vehicle driver to wait at the current location until the scheduled broadcast time. , To give instructions.
According to an eighth aspect of the present invention, in the vehicular broadcast receiver according to the first aspect, the instruction determining means determines the instruction content so that the rewritten data is stopped and received in the recommended route.
According to a ninth aspect of the present invention, in the broadcast receiver for a vehicle according to the eighth aspect, the instruction determining means is configured such that the scheduled passage time when the vehicle passes through the receivable area while traveling on the recommended route is based on the scheduled broadcast time. When it is within the predetermined time, the instruction content is determined so that the rewrite data is stopped and received in the recommended route.
According to a tenth aspect of the present invention, in the vehicle broadcast receiver according to the eighth or ninth aspect, the instruction means instructs the vehicle driver to stop once in the receivable area and wait until the scheduled broadcast time. An instruction is given by displaying an explanation.
According to the eleventh aspect of the present invention, in the broadcast receiver for vehicles according to the first aspect, the instruction determining means determines the instruction contents so as to receive the rewritten data at the destination.
According to a twelfth aspect of the present invention, in the vehicle broadcast receiver according to the eleventh aspect, the instruction determining means receives the rewritten data at the destination when the scheduled broadcast time is within a predetermined time from the estimated arrival time at the destination. The instruction content is determined so as to be performed.
According to a thirteenth aspect of the present invention, in the vehicle broadcast receiver according to the eleventh or twelfth aspect, the instructing means waits without stopping the power supply from the vehicle until the scheduled broadcast time at the destination. An instruction is given by displaying an explanation to the effect.
According to a fourteenth aspect of the present invention, in the vehicular broadcast receiver according to any one of the first to thirteenth aspects, the receiving means further receives information representing the data amount of the rewritten data by a broadcast wave, and the indicating means determines the data amount. Based on this, the vehicle driver is instructed so that the scheduled reception point is within the broadcast wave receivable area from the scheduled broadcast time until reception of the rewritten data is completed.

  According to the present invention, the vehicle driver is instructed so that the scheduled reception point where the vehicle is located at the scheduled broadcast time of the rewrite data is within the broadcast wave receivable area. The rewrite data used for updating the program of the equipment mounted on the vehicle can be obtained.

  A configuration of a navigation apparatus according to an embodiment of the present invention is shown in FIG. This navigation device is mounted on a vehicle and displays a road map to guide a user to a set destination. Furthermore, by receiving terrestrial digital broadcasting, it is possible to allow a user to view a TV program or rewrite a part of firmware that is a program for its own operation. A navigation device 1 shown in FIG. 1 includes a control circuit 11, a ROM 12, a RAM 13, a current location detection device 14, an image memory 15, a display monitor 16, a speaker 17, an input device 18, a digital broadcast reception unit 19, a data storage unit 20, and a disk drive. 21. An antenna 22 is connected to the digital broadcast receiver 19. The disc drive 21 is loaded with a DVD-ROM 23 in which map data is recorded.

  The control circuit 11 includes a microprocessor and its peripheral circuits, and performs various processes and controls as will be described later by executing a control program stored in the ROM 12 using the RAM 13 as a work area. The current location detection device 14 is a device that detects the current location of the host vehicle. For example, a vibration gyro 14a that detects the traveling direction of the host vehicle, a vehicle speed sensor 14b that detects a vehicle speed, and a GPS sensor that detects a GPS signal from a GPS satellite. 14c and the like. The navigation main body 1 can determine a route search start point to be described later based on the current location of the host vehicle detected by the current location detection device 14.

  The image memory 15 temporarily stores image data to be displayed on the display monitor 16. The image data includes road map drawing data for displaying a road map, various graphic data, and the like, and is created in the control circuit 11 based on the map data recorded on the DVD-ROM 23. When the image data created by the control circuit 11 is output to the image memory 15, a road map is displayed on the display monitor 16, and various road traffic information is displayed on the road map.

  The display monitor 16 is a video display using, for example, a liquid crystal display, and displays the road map and road traffic information. Furthermore, a TV image can be displayed by inputting a TV (television) image signal output from the digital broadcast receiving unit 19 as described later through the control circuit 11. In the following description, a screen when displaying a road map and road traffic information is referred to as a navigation screen, and a screen when displaying a TV video is referred to as a TV screen. The user can switch the screen displayed on the display monitor 16 by operating the input device 17, and can display either the navigation screen or the TV screen on the display monitor 16.

  The speaker 17 is a speaker for voice output, and outputs various guidance voices for guiding the user to a set destination, for example, voices for instructing the user to turn left or right. Also, the TV sound can be output by inputting the TV sound output from the digital broadcast receiving unit 19 through the control circuit 11 as described later. Note that the sound output from the speaker 17 and the screen displayed on the display monitor 16 do not necessarily have to be linked. For example, TV sound may be output from the speaker 17 when a navigation screen is displayed on the display monitor 16.

  The input device 18 allows the user to set the destination and waypoint of the vehicle (hereinafter simply referred to as the destination) and to switch between the navigation screen displayed on the display monitor 16 and the TV screen. Has an input switch. The input device 18 is realized by an operation panel, a remote controller, or the like. The user can set a destination by designating a place name, a position on a map, and the like by operating the input device 18 in accordance with a screen instruction displayed on the display monitor 16. When the TV screen is displayed on the display monitor 16, it is possible to instruct the digital broadcast receiver 19 to switch the reception frequency by operating the input device 18. Thereby, the channel of the TV image displayed on the TV screen can be switched.

  The digital broadcast receiver 19 receives a terrestrial digital broadcast broadcast by a broadcast station (not shown) via the antenna 22. The term “terrestrial digital broadcasting” as used herein refers to a digital terrestrial TV broadcasting service that has recently started to be provided in some areas in Japan. In this terrestrial digital broadcasting, unlike the conventional analog TV broadcasting service, TV video and TV audio are broadcast as digital data. Further, in terrestrial digital broadcasting, various other data are broadcast in addition to these TV video data and TV audio data. For example, data scheduled to be broadcast for a television program is broadcast. In the following description, data other than these TV video data and TV audio data is referred to as additional data. As this additional data, rewrite data (hereinafter simply referred to as rewrite data) used to rewrite and upgrade the firmware of the digital broadcast receiving unit 19 may be broadcast.

  The TV video data received by the digital broadcast receiver 19 is demodulated by the digital broadcast receiver 19 and then output to the display monitor 16 through the control circuit 11 as a TV video signal. As a result, the TV screen is displayed on the display monitor 16. The TV audio data received by the digital broadcast receiver 19 is demodulated by the digital broadcast receiver 19 and then output to the speaker 17 as a TV audio signal via the control circuit 11. Thereby, TV sound is output from the speaker 17.

  On the other hand, the additional data received by the digital broadcast receiving unit 19 is output to the control circuit 11, and then the control unit 11 performs processing according to the data content. Hereinafter, the processing content when the above-described rewrite data is received as additional data will be described. The processing contents when additional data having other contents is received are not related to the present invention, and thus the description thereof is omitted.

  When the rewrite data output from the digital broadcast receiving unit 19 to the control circuit 11 is applicable rewrite data after firmware version verification or model verification is performed in the control circuit 11, the rewrite data is transferred to the data storage unit 20. Is output. The data storage unit 20 is configured using a member that can temporarily store data, such as a memory, and temporarily stores rewrite data output from the data storage unit 20. The rewrite data stored in the data storage unit 20 is read out under the control of the control circuit 11, and the firmware of the digital broadcast receiving unit 19 is rewritten using this.

  The disk drive 21 reads map data for displaying a road map on the navigation screen from the loaded DVD-ROM 23. This map data includes route calculation data used for route search, route guidance data used to guide the vehicle to the destination according to recommended routes, such as intersection names and road names, and road data representing roads. include. The map data also includes background data representing map shapes other than roads such as rivers, railways, various facilities on the map (landmarks), and the like.

  In the road data, the minimum unit representing a road section is called a link, and each road is composed of a plurality of links. A point connecting the links is called a node, and each node has position information (coordinate information). The link shape, that is, the shape of the road is determined based on the position information of the node. Although an example using a DVD-ROM is described here, the map data may be read from a recording medium other than the DVD-ROM, such as a CD-ROM or a hard disk.

  When the user operates the input device 18 to set the destination, the navigation device 1 uses the current location detected by the current location detection device 14 as a route search start point and calculates a predetermined algorithm based on the above-described route calculation data. By doing so, a route search from the present location to the destination is performed. The recommended route obtained as a result of the route search is displayed on the road map on the navigation screen so as to be distinguished from other roads by changing its display form, for example, display color. Thus, the user can recognize the recommended route on the road map displayed on the display monitor 16. In addition, the navigation device 1 guides the host vehicle by instructing the traveling direction by an image or voice to the user so that the host vehicle can travel according to the recommended route. In this way, route guidance to the destination is performed by displaying the road map and guiding the vehicle to the destination according to the recommended route.

  Here, the processing content when rewriting data is received as additional data will be described. The additional data to be broadcast may include broadcast schedule data for a television program as described above. This data includes not only television programs but also broadcast schedules such as rewrite data broadcast as additional data. In the following description, the data representing the broadcast schedule of the rewritten data is referred to as index data. The navigation apparatus 1 can know in advance the scheduled broadcast time of the rewritten data by referring to the index data received in advance.

  When the recommended route to the destination is set as described above, the control circuit 11 refers to the index data and confirms the scheduled broadcast time of the rewritten data. Then, based on the current time, the estimated arrival time at the destination, or the received electric field strength map, the scheduled reception point where the vehicle is located at the scheduled broadcast time is within the area where digital terrestrial broadcast waves can be received. Determine the rewrite data reception schedule. The received electric field strength map here is a record of whether or not each point on the road map is within the area where digital terrestrial broadcast waves can be received, and will be described in detail later.

  Rewrite data is received depending on the situation at that time, (a) when receiving while traveling, (b) when receiving at the departure place, (c) when stopping and receiving in the middle, and (d) It may be received at the destination. The rewrite data reception schedule is determined as described below in accordance with any of these cases.

(A) When receiving while traveling If the vehicle is traveling on the recommended route at the scheduled broadcast time of the rewrite data, and the planned traveling point at that time is within the receivable area in the received electric field strength map, Rewrite data can be received while traveling. Therefore, when such a condition is satisfied, a screen as shown in FIG. 2 is displayed on the display monitor 16 before departure, and the user is instructed to receive the rewritten data while traveling. In the following description, this screen is referred to as a traveling reception screen. In the traveling reception screen, a recommended route 30 from the departure point 31 to the destination 32 is displayed, and a scheduled reception zone 33 is displayed in the middle.

  The scheduled reception zone 33 can be identified from the departure time, that is, the time from the current time to the scheduled broadcast time of the rewritten data, and the predicted traveling speed when the host vehicle travels on the recommended route 30. At this time, the predicted traveling speed can be determined according to the road type, the traffic jam situation, and the like. In the traveling reception screen of FIG. 2, an explanation display 41 indicating that the rewritten data is received in this area is attached to the scheduled reception zone 33. Thereby, the user can confirm before departure where the rewritten data is received on the recommended route. Note that the planned traveling point of the host vehicle at the scheduled broadcast time, that is, the planned reception point, may fluctuate depending on road conditions and the like, so it is preferable to display the planned reception zone 33 with a certain width.

  However, if the planned travel point of the vehicle at the scheduled broadcast time of the rewrite data is not within the receivable area in the received electric field strength map, the rewrite data cannot be received during travel. Therefore, in such a case, it is necessary to instruct the user to receive within the receivable area. At this time, the user can be instructed according to one of the following three cases depending on the relationship between the current time or the estimated arrival time at the destination and the scheduled broadcast time.

(B) When receiving at the departure place When the scheduled broadcast time of the rewrite data is within a predetermined time from the departure time, that is, the current time, the rewrite data is sent to the departure place by waiting until the scheduled broadcast time at the departure place, that is, the current location. Can be received. Therefore, in such a case, a screen as shown in FIG. 3 is displayed on the display monitor 16 before departure, and the user is instructed to receive the rewrite data at the departure location (current location). In the following description, this screen is referred to as a departure place reception screen. In this departure place reception screen, the unreceivable zone 34 is shown in a different display form so that the difference from the reception scheduled zone 33 in FIG.

  Similarly to the scheduled reception zone 33, the unreceivable zone 34 can also be specified from the departure time, that is, the time from the current time to the scheduled broadcast time of the rewritten data, and the predicted travel speed when the vehicle travels on the recommended route 30. it can. In the departure place reception screen of FIG. 3, since the rewrite data cannot be received in the unreceivable zone 34 here, the user is instructed to wait at the departure place 31 until the scheduled broadcast time of the rewrite data (for example, 10 minutes). The explanation display 42 is attached. Thereby, it is possible to make the user recognize that it is necessary to wait without departing in order to receive the rewritten data.

(C) When stopping on the way and receiving When the passing time when the own vehicle passes through the receivable area while traveling on the recommended route is within a predetermined time from the scheduled broadcasting time of the rewritten data Then, it is possible to stop within the reception area and receive the rewritten data. Therefore, in such a case, before departure, a screen as shown in FIG. 4 is displayed on the display monitor 16 to instruct the user to stop and receive the rewritten data in the recommended route. In the following description, this screen is referred to as a stop reception screen. In this stop reception screen, a reception scheduled zone 33 and a reception impossible zone 34 are shown in the recommended route 30.

  In the stop reception screen of FIG. 4, rewrite data cannot be received here in the scheduled reception zone 34, so the vehicle temporarily stops in the previous reception planned zone 33 until the scheduled broadcast time of the rewrite data (for example, 5 minutes). An explanation display 43 for instructing the user to wait is attached. In addition, an explanation display 44 indicating that the rewritten data can be received in this area is attached to the scheduled reception zone 33. Thereby, in order to receive rewrite data, it is possible to make the user recognize before departure that it is necessary to stop and wait on the way.

(D) When receiving at the destination When the scheduled broadcast time of the rewrite data is within a predetermined time from the scheduled arrival time at the destination, the broadcast is scheduled without stopping the vehicle engine after arriving at the destination. By waiting until the time, the rewritten data can be received at the destination. Therefore, in such a case, before departure, a screen as shown in FIG. 5 is displayed on the display monitor 16 to instruct the user to receive the rewritten data at the destination. In the following description, this screen is referred to as a destination reception screen.

  In the destination reception screen of FIG. 5, the destination 32 receives the rewritten data after a predetermined time (for example, 10 minutes) from the estimated arrival time, so the power is supplied to the navigation device 1 without stopping the engine at the destination. An explanation display 45 for instructing the user to wait in the supply state is attached. This allows the user to recognize that it is necessary to wait after arrival at the destination in order to receive the rewrite data.

  As described above, the rewrite data reception schedule is determined according to any of the cases (a) to (d), and any one of the screens shown in FIGS. 2 to 5 is displayed before departure. With these screens, an instruction is given to the user so that the scheduled reception point of the rewritten data at the scheduled broadcast time is within the receivable area. If the rewrite data can be received, the rewrite data is stored in the data storage unit 20 as described above. Then, it is read out under the control of the control circuit 11 and the firmware of the digital broadcast receiving unit 19 is rewritten. The rewrite execution timing at this time can be arbitrarily set. For example, it may be executed in response to a user operation, or may be executed when a preset condition is satisfied.

  When receiving rewrite data according to any of the above cases, not only the above screens are displayed before departure, but also necessary guidance is given to the user by voice or image before or during reception. Preferably it is done. For example, when it is just before the scheduled broadcast time of rewritten data, the remaining time is guided, or when stopping and receiving on the way, it is guided to stop when approaching the stop point, and during reception Can tell the user to that effect.

  Next, the received electric field strength map will be described. As described above, the received electric field strength map is a record of whether or not each point on the road map is within an area where digital terrestrial broadcasting can be received. This can be realized by previously recording information related to the received electric field strength of the terrestrial digital broadcast for each region in the map data. That is, it is possible to determine that a point in the area where the received electric field strength is recorded to be equal to or higher than a predetermined value in the map data is in a receivable area.

  Alternatively, a history of received electric field intensity measured at each point in the past may be recorded, and it may be determined based on this measurement history whether or not it is within a receivable area. At this time, it is possible to infer whether or not a point having no past measurement history is within the receivable area from the measurement history at the surrounding points. Note that whether or not the current location is within the receivable region can be determined by measuring the current received electric field strength without the past history at that point.

  Or you may judge by the topographical feature of map data. For example, it is possible to determine that a point in an area where the received electric field strength is considered to be relatively low, such as a tunnel, a mountainous area, an urban area, or an underground parking lot, is not within the receivable area.

  FIG. 6 shows a flowchart when the processing contents described above are executed in the control circuit 11. This flowchart is executed when a recommended route to the destination is set. In step S1, the scheduled broadcast time of the rewritten data is obtained by referring to the index data received in advance. If the index data has not been received at this time, the processing flow in FIG. 6 may be terminated and the subsequent processing may not be performed.

  In step S2, the rewrite data is received before the destination arrival scheduled time by comparing the scheduled broadcast time of the rewrite data obtained in step S1 with the destination arrival scheduled time obtained from the set recommended route. It is determined whether or not to do. When it is determined that the broadcast scheduled time is received earlier than the destination arrival scheduled time and before the destination arrival scheduled time, the process proceeds to step S3. On the contrary, if it is determined that the destination arrival time is received earlier than the broadcast arrival time and after the destination arrival time, the process proceeds to step S11. Below, it demonstrates previously from the case where it progresses to step S3.

  In step S3, it is determined based on the received electric field strength map whether or not the scheduled reception point of the rewritten data is within the receivable area. If it is within the receivable area, the process proceeds to step S4. If it is not within the receivable area, the process proceeds to step S5. In step S4, the rewrite data is received during travel, and the travel reception screen of FIG. 2 is displayed. After step S4 is executed, the processing flow of FIG. 6 ends.

  In step S5, it is determined based on the received electric field strength map whether the current location is within the receivable area. If it is within the receivable area, the process proceeds to step S6. If it is not within the receivable area, the process proceeds to step S8. In step S6, by comparing the scheduled broadcast time of the rewrite data obtained in step S1 with the current time, it is determined whether or not the rewrite data is received within a predetermined time set in advance from the current time.

  If it is determined in step S6 that it is received within a predetermined time from the current time, the process proceeds to step S7, and if it is determined that it is not received within the predetermined time, the process proceeds to step S8. In step S7, the rewrite data is received at the departure place, and the departure place reception screen of FIG. 3 is displayed. After step S7 is executed, the processing flow of FIG. 6 ends.

  In step S8, it is determined whether the recommended route passes through the receivable area based on the received electric field strength map. If it passes through the receivable area, the process proceeds to step S9. If it does not pass, the processing flow of FIG. 6 is terminated. In this case, rewrite data is not received. In step S9, by comparing the scheduled broadcast time of the rewrite data obtained in step S1 with the scheduled transit time when the host vehicle passes the receivable area while traveling on the recommended route, the predetermined transit time is determined. It is determined whether or not to receive in time.

  If it is determined in step S9 that it is received within a predetermined time from the scheduled passage time, the process proceeds to step S10. In step S10, the stop reception screen of FIG. 4 is displayed as stopping in the middle and receiving rewrite data. After step S10 is executed, the processing flow of FIG. 6 ends. On the other hand, if it is determined in step S9 that it will not be received within the predetermined time, step S10 is not executed and the processing flow of FIG. 6 is terminated. In this case, rewrite data is not received.

  Next, the case where it progressed from step S2 to step S11 is demonstrated. In step S11, based on the received electric field strength map, it is determined whether or not the destination is within the receivable area. If it is within the receivable area, the process proceeds to step S12. On the other hand, if it is not within the receivable area, the process proceeds to step S5 to perform the processing described above. In step S12, by comparing the scheduled broadcast arrival time of the rewrite data obtained in step S1 with the planned destination arrival time, whether or not the rewrite data is received within a predetermined time set in advance from the planned destination arrival time. Determine.

  If it is determined in step S12 that it is received within the predetermined time from the scheduled arrival time, the process proceeds to step S13. In step S13, the destination reception screen of FIG. 5 is displayed as the rewrite data is received at the destination. After executing step S13, the processing flow of FIG. 6 is terminated. On the other hand, if it is determined in step S12 that the data will not be received within the predetermined time, step S13 is not executed and the processing flow of FIG. 6 is terminated. In this case, rewrite data is not received.

  As described above, the rewrite data reception schedule is determined according to any of the cases (a) to (d).

According to the embodiment described above, the following operational effects can be obtained.
(1) After the reception schedule for rewritten data is determined, any of the screens shown in FIGS. 2 to 5 is displayed on the display monitor 16 before departure, so that the scheduled reception point where the vehicle is located at the scheduled broadcast time of the rewritten data is It was decided to instruct the driver of the vehicle to be within the area where the digital wave can be received. Since it did in this way, rewriting data can be obtained, without requiring special equipment.

(2) Depending on the situation at that time, driving the vehicle so that the rewrite data is received while traveling, or is received at the current location or destination, or stopped and received during the recommended route It was decided to give instructions to the person. Specifically, when the condition corresponding to any of the above-described cases (a) to (d) is satisfied, any one of the screens of FIGS. 2 to 5 is displayed on the display monitor 16 accordingly. It was decided to give instructions to the driver. Since it did in this way, it can instruct | indicate with respect to a driver | operator to acquire rewriting data by an appropriate method according to a condition.

  In the above embodiment, an example in which rewrite data and index data are received by terrestrial digital broadcasting has been described. However, the present invention is not limited to this. For example, these may be received by digital broadcasting from a satellite, or may be received from radio broadcasting. Moreover, in said embodiment, although the instruction | indication was given with respect to the driver | operator of the vehicle by displaying the screen of any of FIGS. 2-5, this invention is not limited to this content. For example, different screen contents may be output, or audio may be output. As long as the rewrite data and information on the scheduled broadcast time are received by broadcasting and the vehicle driver is instructed so that the scheduled reception point at the scheduled broadcast time is within the receivable area, the application of the present invention Included in range.

  Further, in the above embodiment, an example in which the flowchart of FIG. 6 is executed when the recommended route is set, the rewrite data reception schedule is determined, and any of the screens of FIGS. However, the flowchart of FIG. 6 may be executed every predetermined time. In this case, the contents of the reception schedule may change after the departure due to the difference between the predicted traveling speed and the actual traveling speed. Therefore, if the content of the reception schedule does not change after departure, no particular instruction is given to the user, and when it changes, one of the screens of FIGS. 2 to 5 is displayed according to the changed content. It is preferable.

  In the above embodiment, not only the broadcast schedule of rewrite data but also the information on the data amount of the rewrite data may be included in the index data so that the data amount is taken into account when determining the reception schedule. . That is, from the information on the data amount of the rewrite data included in the index data, the time required from the start of the reception of the rewrite data to the completion of the reception is obtained. Then, the reception schedule is determined so that all the scheduled reception points are within the receivable area from the scheduled broadcast time of the rewritten data to the completion of reception of the rewritten data. In this way, even when the amount of rewritten data is large and the reception time is long, the reception schedule can be determined so that it can be reliably received.

  In the above embodiment, an example is described in which the navigation device performs a route search based on map data recorded on a storage medium such as a DVD-ROM and guides the host vehicle according to the recommended route searched. The present invention is not limited to this content. For example, the present invention can be applied to a communication navigation apparatus that downloads map data from an information distribution center using wireless communication using a mobile phone or the like.

  In the above-described embodiment, the example in which the receiving unit is realized by the digital broadcast receiving unit 19 and the instruction unit and the display unit are realized by the control circuit 11 and the display monitor 16 has been described. However, the present invention is not limited to these contents. The present invention is not limited to the above-described embodiment, and other modes conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.

It is a block diagram which shows the structure of the navigation apparatus by one Embodiment of this invention. It is a figure which shows the example of the receiving screen during driving | running | working displayed when rewriting data is received during driving | running | working. It is a figure which shows the example of the departure place receiving screen displayed when rewriting data is received at a departure place. It is a figure which shows the example of the stop reception screen displayed when stopping in the middle and receiving rewrite data. It is a figure which shows the example of the destination reception screen displayed when rewriting data is received at the destination. It is a flowchart of the process performed when determining the reception schedule of rewriting data.

Explanation of symbols

1 Navigation body 11 Control circuit 12 ROM
13 RAM
DESCRIPTION OF SYMBOLS 14 Present location detection apparatus 15 Image memory 16 Display monitor 17 Speaker 18 Input apparatus 19 Digital broadcast receiving part 20 Data storage part 21 Disk drive 22 Antenna 23 DVD-ROM

Claims (14)

A broadcast receiver mounted on a vehicle,
Rewriting data for rewriting the program of the broadcast receiver itself, and receiving means for receiving information on the scheduled broadcast time of the rewritten data by broadcast waves;
Current location detection means for detecting the current location of the vehicle;
Destination setting means for setting the destination of the vehicle;
Route setting means for setting a recommended route from the current location to the destination;
Receivable area obtaining means for obtaining information on a receivable area of the broadcast wave;
Instruction determining means for determining instruction contents for the driver of the vehicle from a plurality of instruction contents based on the current location, current time, the destination, the recommended route, the receivable area, and the scheduled broadcast time;
Instructing means for instructing the driver of the vehicle so that the scheduled reception point where the vehicle is located at the scheduled broadcast time is within the receivable area according to the instruction content determined by the instruction determining means. A broadcast receiver for a vehicle, comprising: The vehicle broadcast receiver according to claim 1,
The vehicular broadcast receiver characterized in that the instruction determination means determines the instruction content so as to receive the rewrite data during traveling. The vehicle broadcast receiver according to claim 2,
The instruction determining means receives the rewritten data during traveling when the vehicle is traveling on the recommended route at the scheduled broadcast time and the planned traveling point at that time is within the receivable area. A broadcast receiver for a vehicle, wherein the instruction content is determined. In the broadcast receiver for vehicles of Claim 2 or 3,
The vehicular broadcast reception characterized in that the instruction means performs the instruction by displaying a road map of the recommended route and further displaying a reception planned zone for receiving the rewrite data in the middle of the recommended route. Machine. The vehicle broadcast receiver according to claim 1,
The vehicular broadcast receiver, wherein the instruction determining means determines the instruction content so as to receive the rewrite data at the current location. In the broadcast receiver for vehicles of Claim 5,
The vehicular broadcast receiver characterized in that the instruction determining means determines the instruction content to receive the rewritten data at the current location when the scheduled broadcast time is within a predetermined time from the current time. In the broadcast receiver for vehicles of Claim 5 or 6,
The vehicle broadcast receiver according to claim 1, wherein the instruction means performs the instruction by displaying an instruction for instructing a driver of the vehicle to wait at the current location until the scheduled broadcast time. The vehicle broadcast receiver according to claim 1,
The vehicle instruction receiver is configured to determine the content of the instruction so that the rewriting data is stopped and received during the recommended route. The vehicle broadcast receiver according to claim 8,
The instruction determining means, when the scheduled passage time when the vehicle passes through the receivable area while traveling on the recommended route is within a predetermined time from the scheduled broadcasting time, A vehicular broadcast receiver, wherein the instruction content is determined so as to stop and receive in the middle of a recommended route. The vehicle broadcast receiver according to claim 8 or 9,
The instructing means performs the instruction by displaying an explanation to instruct the driver of the vehicle to stop once in the receivable area and wait until the scheduled broadcast time. Broadcast receiver for vehicles. The vehicle broadcast receiver according to claim 1,
The vehicular broadcast receiver characterized in that the instruction determining means determines the instruction content so as to receive the rewrite data at the destination. In the broadcast receiver for vehicles of Claim 11,
The instruction determining means determines the instruction content so that the rewrite data is received at the destination when the scheduled broadcast time is within a predetermined time from the estimated arrival time at the destination. Broadcast receiver for vehicles. The vehicle broadcast receiver according to claim 11 or 12,
The instruction means performs the instruction by displaying an explanation to instruct the driver of the vehicle to wait without stopping power supply from the vehicle until the scheduled broadcast time at the destination. The broadcast receiver for vehicles characterized by the above-mentioned. In the broadcast receiver for vehicles in any one of Claims 1-13,
The receiving means further receives information representing the data amount of the rewritten data by broadcast waves,
Based on the data amount, the instructing means is configured so that the scheduled reception point is within the broadcast wave receivable area from the scheduled broadcast time to the completion of reception of the rewritten data. A vehicular broadcast receiver characterized by instructing a driver.

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