JP2010036871A - Navigation system - Google Patents

Abstract

Provided is a navigation system capable of relaxing a restriction on an input operation during follow-up traveling and allowing a complicated operation.
A display device on which an information display area and operation buttons are formed on a screen, a follow-up running control device that controls follow-up running, and a sensor that detects whether the vehicle is stopped or running, 3, a traveling state determination unit that determines whether the vehicle is traveling, stopped, or following traveling based on a signal representing the following state transmitted from the following traveling control device and a signal transmitted from the sensor. 21 and an operation button formed on the display device when it is determined by the traveling state determination unit that the transition from traveling to follow-up traveling has been made, it is determined that the operation restriction imposed during traveling has been lifted. Are displayed as buttons that can be operated as many times as when the vehicle is stopped, and an input device 5 that presses the operation buttons displayed as buttons that can be operated on the display device under the control of the display control unit.
[Selection] Figure 2

Description

  The present invention relates to a navigation system that guides a driver to a destination while displaying various information on a display device, and more particularly to a technique for relaxing operation restrictions and display restrictions imposed during traveling.

  Conventionally, in a display device provided in a navigation device or the like, an image related to navigation such as a map and a current position, an image related to a television, an image related to a telephone, and the like are displayed. This display device is installed in the vicinity of the center of the instrument panel so that it can be operated mainly by a driver's seat and a passenger's seat.

  In such a navigation device, in order to ensure safety, a complicated operation for using functions such as navigation, television, and telephone, for example, map search in navigation, destination setting or Input operations such as phone number input are disabled and are limited to the minimum necessary input operations (operation restrictions). Similarly, the amount of information displayed on the display device is also restricted during travel of the vehicle (display restriction). However, such a restriction is very inconvenient for passengers other than the driver.

  In connection with the operation restriction and display restriction of the navigation device, Patent Document 1 allows an occupant other than the driver to perform an unrestricted operation from the remote operation device and removes the restriction. An in-vehicle display control device and a remote operation device that make it impossible to perform the operation and the control operation simultaneously with one hand are disclosed.

  In the technique disclosed in Patent Document 1, information displayed by a display unit installed in a passenger compartment is controlled by a control switch in a remote control device, and the control is limited according to the traveling state of the vehicle. . Therefore, the remote operation device is provided with a release switch for releasing the restriction, and the release switch and the control switch are arranged in a positional relationship that is difficult to operate with one hand, so that the operator is forced to operate with both hands. It is virtually impossible for a driver who steers the steering wheel while traveling to operate a remote control device that performs input operation with both hands. Therefore, safety during traveling is ensured, and passengers other than the driver are not restricted, and various operations are possible.

Japanese Patent Application Laid-Open No. 2004-216953

  By the way, in recent vehicle control technology, the following cruise control (ACC: Adaptive Cruise Control) that automatically controls so that the distance between the preceding vehicle and the preceding vehicle is kept almost constant during traveling has been put into practical use. In addition to this, a system that automates the steering operation has been proposed. When such a system is in a state of following driving, the need for driving operation is reduced compared to the normal driving state. Therefore, it is possible to relax restrictions on input operations and allow complicated operations during following driving. It is desired.

  The present invention has been made in order to meet the above-described demand, and an object of the present invention is to provide a navigation system capable of relaxing a restriction on an input operation and allowing a complicated operation during follow-up traveling. .

  In order to solve the above problems, a navigation system according to the present invention includes a display device having an information display area and operation buttons formed on a screen, a follow-up running control device that controls follow-up running, and whether the vehicle is stopped or running. Whether the vehicle is traveling, stopped, or following traveling based on a sensor that detects whether the vehicle is traveling, a signal that represents the following state sent from the following traveling control device, and a signal that is sent from the sensor When the travel state determination unit and the travel state determination unit determine that the transition from the traveling to the follow-up traveling is made, it is determined that the operation restriction imposed during the traveling is released, and the display device The display control unit displays the operation buttons formed in the same number as the operable buttons when the vehicle is stopped, and the operation buttons displayed as buttons that can be operated on the display device by the control of the display control unit An input device for pressing.

  According to the navigation system of the present invention, when a transition is made from running to follow-up running, it is determined that the operation restriction imposed during running is released, and the operation button formed on the display device is stopped. Since it is configured to display as the same number of operable buttons as the inside, it is possible to relax the restriction of the input operation during the follow-up traveling and allow a complicated operation.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of a navigation system according to Embodiment 1 of the present invention. The navigation system includes a follow-up travel control device 1, a vehicle speed sensor 2, a parking brake sensor 3, a GPS (Global Positioning System) antenna 4, an input device 5, a navigation unit 6, and a display device 7.

  The follow-up running control device 1 performs follow-up running control that automatically controls the inter-vehicle distance between the preceding vehicle and the own vehicle to be kept substantially constant. This follow-up running control device 1 sends a follow-up state signal indicating whether or not follow-up running is being performed to the navigation unit 6. In this case, a dedicated signal line is provided between the follow-up running control device 1 and the navigation unit 6, and the follow-up running control device 1 sends a signal with a voltage of a predetermined value or more to the signal line during the follow-up running. When not in the middle, it is possible to transmit the signal having a voltage less than a predetermined value to the signal line so that the tracking state is transmitted to the navigation unit 6. In addition, a command indicating whether the vehicle is in the following operation state or the normal operation state is transmitted from the system that comprehensively controls the vehicle to the navigation unit 6 using communication means such as an in-vehicle LAN (Local Area Network). It can also be configured.

  The vehicle speed sensor 2 corresponds to a part of the “sensor” of the present invention. This vehicle speed sensor 2 detects whether or not the vehicle has traveled a predetermined distance, generates a vehicle speed pulse each time it is detected, and sends it to the navigation unit 6 as a vehicle speed pulse signal.

  The parking brake sensor 3 corresponds to another part of the “sensor” of the present invention. The parking brake sensor 3 detects whether the parking brake is applied, and sends the detection result to the navigation unit 6 as a parking brake signal. In the navigation system according to the first embodiment, whether the vehicle is traveling or stopped is determined using two sensors such as the vehicle speed sensor 2 and the parking brake sensor 3. Alternatively, only one of the vehicle speed sensor 2 and the parking brake sensor 3 can be used.

  The GPS antenna 4 receives radio waves transmitted from GPS satellites, converts them into electrical signals, and sends them to the navigation unit 6 as GPS signals.

  The input device 5 includes, for example, at least one of a touch panel, a remote controller (remote controller), a voice input device, and the like placed on the screen of the display device 7, and operation buttons formed on the screen of the display device 7. Used to press. A signal generated by operating the input device 5 is sent to the navigation unit 6.

  The navigation unit 6 controls the entire navigation system. Details of the navigation unit 6 will be described later.

  The display device 7 is composed of, for example, an LCD (Liquid Crystal Display), and a map around the vehicle position, the current position of the vehicle, and operation buttons are arranged according to the display data sent from the navigation unit 6. Various information such as menu screens, surrounding facilities or traffic information is displayed. The contents displayed on the display device 7 will be described in detail later.

  Next, details of the navigation unit 6 will be described. The navigation unit 6 includes a CPU (Central Processing Unit) 11, a HDD (Hard Disk Drive) 12, and a GPS receiver 13.

  CPU11 performs the process for implement | achieving the various functions as a navigation system. Details of the CPU 11 will be described later. The HDD 12 stores map data including road data and facility data. The map data stored in the HDD 12 is read by the CPU 11. The GPS receiver 13 detects the vehicle position (latitude and longitude) based on the GPS signal transmitted from the GPS antenna 4. The vehicle position detected by the GPS receiver 13 is sent to the CPU 11 as a vehicle position signal.

  Next, details of the CPU 11 will be described. FIG. 2 is a block diagram illustrating a functional configuration of the CPU 11. The CPU 11 includes a traveling state determination unit 21, a display control unit 22, an input control unit 23, a vehicle position determination unit 24, a map data acquisition unit 25, and a surrounding facility search unit 26 configured by a program.

  The traveling state determination unit 21 is based on the following state signal sent from the following traveling control device 1, the vehicle speed pulse signal sent from the vehicle speed sensor 2, and the parking brake signal sent from the parking brake sensor 3. That is, it is determined whether the vehicle is traveling, stopped, or following. The determination result by the traveling state determination unit 21 is sent to the display control unit 22, the input control unit 23, and the surrounding facility search unit 26.

  The display control unit 22 controls the content displayed on the display device 7 according to the determination result received from the traveling state determination unit 21. For example, when the determination result received from the traveling state determination unit 21 indicates that the vehicle is stopped, the display control unit 22 determines that the display restriction imposed during traveling has been released, and requires detailed attention. Character information is displayed on the display device 7. In addition, when the determination result received from the traveling state determination unit 21 indicates that the vehicle is traveling, the display control unit 22 displays easy-to-view information on which detailed character information, a moving image, an image, and the like are deleted, on the display device 7. Display. Furthermore, when the determination result received from the traveling state determination unit 21 indicates that the vehicle is following the traveling, the display control unit 22 displays simple information in which a part of detailed character information, a moving image, an image, or the like is deleted. 7 is displayed.

  Further, the display control unit 22 controls the number of operation buttons displayed as buttons that can be operated on the display device 7 according to the determination result received from the traveling state determination unit 21. For example, when the determination result received from the traveling state determination unit 21 indicates that the vehicle is stopped, it is determined that the operation restriction imposed during traveling is released, and the operation can be performed so that a complicated operation is possible. A number of operation buttons are displayed on the display device 7 as buttons. In addition, when the determination result received from the traveling state determination unit 21 indicates that the vehicle is traveling, the display control unit 22 uses a small number of operation buttons as operable buttons so that complicated operations are not possible. It is displayed on the display device 7. Further, when the determination result received from the traveling state determination unit 21 indicates that the vehicle is following, the display control unit 22 displays, as the operable buttons, a number of operation buttons that are smaller than when the vehicle is stopped and larger than when the vehicle is traveling. To display.

  Furthermore, the display control unit 22 displays facility information on the display device 7 based on the search result sent from the surrounding facility search unit 26, and also arranges a map around the vehicle position, a vehicle position mark, and operation buttons. Various information such as peripheral facilities or traffic information is displayed on the display device 7 in response to the input from the menu screen or the input device 5.

  A display example by the control of the display control unit 22 will be described. FIG. 3 shows a reception screen of a stopped VICS (Vehicle Information and Communication System (registered trademark / described below)), where detailed traffic information is displayed in the information display area 101 in the center, In the section, a “previous page” button 111, a “next page” button 112, and a “return” button 113 are displayed as operable buttons.

  FIG. 4 shows a reception screen of a running VICS. The information display area 101 does not display the traffic information that was displayed while the vehicle was stopped, but displays a simple character string. In addition, the “previous page” button 111 and the “next page” button 112 that are displayed while the vehicle is stopped are displayed in, for example, different colors so that the user can recognize at a glance that they are inoperable buttons. Only the “return” button 113 is displayed as an operable button in the same form as when the vehicle is stopped.

  FIG. 5 shows a VICS reception screen during follow-up travel, and only a part of the traffic information displayed while the vehicle is stopped is displayed in the information display area 101. Further, the “previous page” button 111 displayed while the vehicle is stopped is, for example, a color different from the other and different from when the vehicle is stopped and running so that the user can recognize at a glance that the button cannot be operated. The “next page” button 112 is displayed as a button that can be operated in a color different from that of the other while being stopped and running, and the “return” button 113 is stopped as an operable button. It is displayed in the same form as when traveling.

  When the input control unit 23 determines whether or not to accept the operation of the operation button indicated by the signal sent from the input device 5 according to the determination result received from the traveling state determination unit 21, Then, the processing corresponding to the operation button is executed. For example, when the determination result received from the traveling state determination unit 21 indicates that the vehicle is stopped, the operation of a number of operation buttons displayed on the display device 7 as an operable button is accepted. On the other hand, when the determination result received from the traveling state determination unit 21 indicates that the vehicle is traveling, only the operation of a small number of operation buttons displayed on the display device 7 as operable buttons is accepted. Furthermore, when the determination result received from the traveling state determination unit 21 indicates that the vehicle is following, the operation of the operation buttons that are less than the stopped state displayed on the display device 7 as the operable buttons and more than the traveling state are operated. Accept.

  The own vehicle position determination unit 24 calculates the own vehicle position on the map based on the own vehicle position signal sent from the GPS receiver 13 and the map data acquired from the map data acquisition unit 25. The vehicle position calculated by the vehicle position determination unit 24 is sent to the surrounding facility search unit 26 as vehicle position data.

  The map data acquisition unit 25 acquires map data from the HDD 12. The map data acquired by the map data acquisition unit 25 is sent to the vehicle position determination unit 24 and the surrounding facility search unit 26.

  The peripheral facility search unit 26 is a facility included in the map data sent from the map data acquisition unit 25, in the vicinity of the own vehicle position indicated by the own vehicle location data sent from the own vehicle location determination unit 24. Search based on data. Among the facilities searched by the peripheral facility search unit 26, the data of facilities existing in a range corresponding to the determination result received from the traveling state determination unit 21 is sent to the display control unit 22.

  A display example of facilities searched by the peripheral facility search unit 26 will be described. FIG. 6 shows a stationary facility search screen when the vehicle is stopped. A button for selecting a category is displayed at the center, and an operation button is displayed at the periphery. “Convenience store” button 121, “gas station” button 122, “parking lot” button 123, “road station” button 124, “interchange” button 125 and “service area” button 126 are provided as peripheral facility search categories. It has been.

  Now, when the peripheral facility search unit 26 performs a peripheral facility search in response to pressing of the “gas station” button 122, as shown in the search result screen of FIG. The list is displayed in list form in ascending order from the vehicle position in the number that can be displayed on the screen.

  FIG. 8 shows a surrounding facility search screen during traveling, and the buttons 121 to 126 for selecting the category in the center are different from others, for example, so that the user can understand at a glance that the buttons are inoperable. Displayed in color.

  FIG. 9 shows a screen of the search result of the peripheral facility search performed during the follow-up traveling. The peripheral facility search screen during the follow-up traveling is the same as the stopped peripheral facility search screen shown in FIG. 6, but the facilities searched by the peripheral facility search unit 26 are within a predetermined distance from the vehicle position, for example, The data of the facility existing within 3 km from the own vehicle position is sent to the display control unit 22. Accordingly, a limited number of facility names 131 to 135 are displayed on the display device 7.

  Next, referring to the flowchart shown in FIG. 10, focusing on the process of determining whether the navigation system according to Embodiment 1 of the present invention, which is configured as described above, is traveling, stopped, and following traveling is described. While explaining. This process is executed at a predetermined timing, for example, when there is a change in the input vehicle speed pulse signal or parking brake signal, or at regular intervals.

  First, it is checked whether the vehicle is traveling or stopped (step ST11). In other words, the traveling state determination unit 21 checks whether information representing a traveling state stored in itself (hereinafter referred to as “traveling state information”) indicates that the vehicle is traveling or is stopped. In the navigation system according to the first embodiment, the traveling state determination unit 21 stores whether traveling or stopped as traveling state information.

  If it is determined in step ST11 that the vehicle is traveling, it is then checked whether the vehicle speed is equal to or lower than a predetermined speed (step ST12). That is, the traveling state determination unit 21 checks whether the vehicle speed pulse signal sent from the vehicle speed sensor 2 indicates a predetermined speed or less.

  If it is determined in step ST12 that the vehicle speed is equal to or lower than the predetermined speed, it is then checked whether the parking brake is applied (step ST13). That is, the traveling state determination unit 21 checks whether the parking brake signal transmitted from the parking brake sensor 3 indicates that the parking brake is applied.

  If it is determined in step ST13 that the parking brake is applied, it is determined that the vehicle has transitioned from traveling to stopping, and the traveling state information is changed from traveling to stopping (step ST14). That is, the traveling state determination unit 21 changes the traveling state information stored in itself from traveling to stopping. The driving state information indicating that the vehicle is stopped after the change is sent to the display control unit 22.

  Next, the display is changed to a stopped display (step ST15). That is, when the traveling state information received from the traveling state determination unit 21 indicates that the vehicle is stopped, the display control unit 22 determines that the display restriction imposed during traveling has been released, and details that require attention. Character information is displayed on the display device 7.

  If it is determined in step ST12 that the vehicle speed is not equal to or lower than the predetermined speed, and if it is determined in step ST13 that the parking brake is not applied, then whether or not the vehicle is following traveling is determined. It is examined (step ST16). That is, the traveling state determination unit 21 determines whether the vehicle is following traveling based on the tracking state signal sent from the following traveling control device 1.

  If it is determined in step ST16 that the vehicle is following, the sequence proceeds to step ST14 and the above-described processing is performed in order to realize the same handling as when the vehicle is stopped. On the other hand, if it is determined in step ST16 that the vehicle is not following, it is recognized that there is no change in the running state, the sequence returns to step ST11, and the above-described processing is repeated.

  If it is determined in step ST11 that the vehicle is stopped, it is then checked whether the vehicle speed is equal to or higher than a predetermined speed (step ST17). That is, the traveling state determination unit 21 checks whether or not the vehicle speed pulse signal sent from the vehicle speed sensor 2 indicates a predetermined speed or more.

  If it is determined in step ST17 that the vehicle speed is not equal to or higher than the predetermined speed, it is then checked whether or not the parking brake is released (step ST18). That is, the traveling state determination unit 21 checks whether or not the parking brake signal sent from the parking brake sensor 3 indicates that the parking brake is released. If it is determined in step ST18 that the parking brake is not released, it is recognized that the vehicle is stopped and the running state is not changed, the sequence returns to step ST11 and the above-described processing is repeated. .

  If it is determined in step ST17 that the vehicle speed is equal to or higher than the predetermined speed, and if it is determined in step ST18 that the parking brake is released, then whether or not the vehicle is following traveling is determined. Is examined (step ST19). That is, the traveling state determination unit 21 determines whether the vehicle is following traveling based on the tracking state signal sent from the following traveling control device 1. If it is determined in this step ST19 that the vehicle is following the vehicle, it is recognized that the same handling as when the vehicle is stopped and that the running state is not changed, the sequence returns to step ST11 and the above-described processing is performed. Repeated.

  On the other hand, if it is determined in step ST19 that the vehicle is not following the vehicle, it is determined that the vehicle has transitioned from being stopped to traveling, and the traveling state information is changed from being stopped to traveling (step ST20). That is, the traveling state determination unit 21 changes the traveling state information stored in itself from when the vehicle is stopped to when traveling. The traveling state information indicating the traveling after the change is sent to the display control unit 22.

  Next, the display is changed to a running display (step ST21). That is, when the driving state information received from the driving state determination unit 21 indicates that the vehicle is running, the display control unit 22 displays easy-to-view information in which detailed character information, moving images, images, and the like are deleted. To display. Thereafter, the sequence returns to step ST11 and the above-described processing is repeated.

Embodiment 2. FIG.
The navigation system according to Embodiment 2 of the present invention displays the operation buttons formed on the display device 7 as a number of operable buttons that are smaller than when the vehicle is stopped and larger than when the vehicle is traveling when the vehicle is following the vehicle. In the information display area of the display device 7, a smaller amount of information is displayed than when the vehicle is stopped and when the vehicle is traveling.

  The configuration of the navigation system according to the second embodiment is the same as the configuration of the navigation system according to the first embodiment shown in FIGS. However, the traveling state determination unit 21 stores, as the traveling state information, whether it is traveling, stopped, or following traveling, and stores whether it is traveling or stopped. This is different from the traveling state determination unit 21 of the navigation system according to the first embodiment.

  Next, the operation of the navigation system according to the second embodiment will be described with reference to the flowcharts shown in FIGS. 11 to 14 with a focus on processing for determining whether the vehicle is traveling, stopping, or following traveling. This process is executed at a predetermined timing, for example, when there is a change in the input vehicle speed pulse signal or parking brake signal, or at regular intervals.

  First, it is checked whether or not the vehicle is stopped (step ST31). That is, the traveling state determination unit 21 checks whether or not the traveling state information stored in itself indicates that the vehicle is stopped. If it is determined in step ST31 that the vehicle is not stopped, it is then checked whether the vehicle is traveling or following (step ST32). That is, the traveling state determination unit 21 checks whether the traveling state information stored in itself indicates that the vehicle is traveling or is following the vehicle.

  If it is determined in this step ST32 that the vehicle is following the vehicle, a process of following the vehicle is executed (step ST33). Details of the follow-up running process executed in step ST33 will be described later. Thereafter, the sequence returns to step ST31 and the above-described processing is repeated.

  If it is determined in step ST32 that the vehicle is traveling, a traveling process is executed (step ST34). Details of the running process executed in step ST34 will be described later. Thereafter, the sequence returns to step ST31 and the above-described processing is repeated.

  If it is determined in step ST31 that the vehicle is stopped, a stoppage process is executed (step ST35). Details of the stopping process executed in step ST35 will be described later. Thereafter, the sequence returns to step ST31 and the above-described processing is repeated.

  Next, details of the follow-up running process performed in step ST33 of the process shown in FIG. 11 will be described with reference to the flowchart shown in FIG.

  In the following running process, first, it is checked whether or not the vehicle speed is equal to or lower than a predetermined speed (step ST41). The process in step ST41 is the same as the process in step ST12 described above. If it is determined in step ST41 that the vehicle speed is equal to or lower than the predetermined speed, it is then checked whether the parking brake is applied (step ST42). The process in step ST42 is the same as the process in step ST13 described above.

  In this step ST42, if it is determined that the parking brake is applied, it is determined that the vehicle has transitioned from following traveling to stopping, and the traveling state information is changed from following traveling to stopping (step ST43). ). That is, the traveling state determination unit 21 changes the traveling state information stored in itself from the following traveling to the stopping. The driving state information indicating that the vehicle is stopped after the change is sent to the display control unit 22.

  Next, the display is changed to a stopped display (step ST44). The process in step ST44 is the same as the process in step ST15 described above. Thereafter, the process returns to the process shown in FIG. If it is determined in step ST41 that the vehicle speed is not equal to or less than the predetermined speed, and if it is determined in step ST42 that the parking brake is not applied, then it is checked whether the vehicle is following following. (Step ST45). The process in step ST45 is the same as the process in step ST19 described above.

  If it is determined in step ST45 that the vehicle is following the vehicle, it is recognized that there is no change in the running state, and the sequence returns to the process shown in FIG. On the other hand, when it is determined in step ST45 that the vehicle is not following the vehicle, it is determined that the vehicle has been moved from the vehicle following the vehicle to the vehicle, and the traveling state information is changed from the vehicle following the vehicle to the vehicle running (step ST46). In other words, the traveling state determination unit 21 changes the traveling state information stored in itself from the following traveling to the traveling. The traveling state information indicating the traveling after the change is sent to the display control unit 22.

  Next, the display is changed to a running display (step ST47). That is, the display control unit 22 causes the display device 7 to display easy-to-view information from which detailed character information, a moving image, an image, or the like has been deleted. Thereafter, the process returns to the process shown in FIG.

  Next, details of the running process performed in step ST34 of the process shown in FIG. 11 will be described with reference to the flowchart shown in FIG.

  In the running process, first, it is checked whether or not the vehicle speed is equal to or lower than a predetermined speed (step ST51). The process in step ST51 is the same as the process in step ST12 described above. If it is determined in step ST51 that the vehicle speed is equal to or lower than the predetermined speed, it is then checked whether the parking brake is applied (step ST52). That is, the traveling state determination unit 21 checks whether the parking brake signal transmitted from the parking brake sensor 3 indicates that the parking brake is applied.

  If it is determined in step ST52 that the parking brake is applied, it is determined that the vehicle has transitioned from traveling to stopping, and the traveling state information is changed from traveling to stopping (step ST53). The process in step ST53 is the same as the process in step ST14 described above. The driving state information indicating that the vehicle is stopped after the change is sent to the display control unit 22.

  Next, the display is changed to a stopped display (step ST54). The process in step ST54 is the same as the process in step ST15 described above. Thereafter, the process returns to the process shown in FIG.

  If it is determined in step ST51 that the vehicle speed is not less than or equal to the predetermined speed, and if it is determined in step ST52 that the parking brake is not applied, then it is checked whether the vehicle is following following. (Step ST55). The process in step ST55 is the same as the process in step ST19 described above.

  If it is determined in step ST55 that the vehicle is not following the vehicle, it is recognized that there is no change in the running state, and the sequence returns to the process shown in FIG. On the other hand, if it is determined in step ST55 that the vehicle is following the vehicle, it is determined that the vehicle has moved from the vehicle to the vehicle following the vehicle, and the traveling state information is changed from the vehicle to the vehicle following the vehicle (step ST56). . That is, the traveling state determination unit 21 changes the traveling state information stored in itself from traveling to follow-up traveling. The driving state information indicating the following driving after the change is sent to the display control unit 22.

  Next, the display is changed to a follow-up running display (step ST57). The process in step ST57 is the same as the process in step ST47 described above. Thereafter, the process returns to the process shown in FIG.

  Next, details of the stopping process performed in step ST35 of the process shown in FIG. 11 will be described with reference to the flowchart shown in FIG.

  In the stopping process, first, it is checked whether or not the vehicle speed is equal to or higher than a predetermined speed (step ST61). The process in step ST61 is the same as the process in step ST17 described above. If it is determined in step ST61 that the vehicle speed is equal to or higher than the predetermined speed, the sequence proceeds to step ST63.

  On the other hand, if it is determined in step ST61 that the vehicle speed is not equal to or higher than the predetermined speed, it is then checked whether or not the parking brake is released (step ST62). The process in step ST62 is the same as the process in step ST18 described above.

  If it is determined in step ST62 that the parking brake is not released, it is recognized that there is no change in the running state, and the sequence returns to the process shown in FIG. On the other hand, if it is determined in step ST62 that the parking brake is released, the sequence proceeds to step ST63.

  In step ST63, it is checked whether the vehicle is following following. The process in step ST63 is the same as the process in step ST19 described above. If it is determined in this step ST63 that the vehicle is following the vehicle, it is determined that the vehicle has transitioned from the stop to the vehicle following the vehicle, and the traveling state information is changed from the vehicle being stopped to the vehicle following the vehicle (step ST64). In other words, the traveling state determination unit 21 changes the traveling state information stored in itself from when the vehicle is stopped to when following the vehicle. The driving state information indicating the following driving after the change is sent to the display control unit 22.

  Next, the display is changed to a follow-up running display (step ST65). That is, when the driving state information received from the driving state determination unit 21 indicates that the following driving is in progress, the display control unit 22 displays simple information in which a part of detailed character information, a moving image, or an image is deleted. It is displayed on the device 7. Thereafter, the process returns to the process shown in FIG.

  If it is determined in step ST63 that the vehicle is not following the vehicle, it is determined that the vehicle has transitioned from being stopped to traveling, and the traveling state information is changed from being stopped to traveling (step ST66). The process in step ST66 is the same as the process in step ST20 described above. The traveling state information indicating the traveling after the change is sent to the display control unit 22.

  Next, the display is changed to a running display (step ST67). The process in step ST67 is the same as the process in step ST47 described above. Thereafter, the process returns to the process shown in FIG.

It is a block diagram which shows the structure of the navigation system which concerns on Embodiment 1 of this invention. It is a block diagram which shows the functional structure of CPU used with the navigation system which concerns on Embodiment 1 of this invention. It is a figure which shows the reception screen of VICS displayed during a stop displayed with the navigation system which concerns on Embodiment 1 of this invention. It is a figure which shows the reception screen of VICS displayed during driving | running | working displayed with the navigation system which concerns on Embodiment 1 of this invention. It is a figure which shows the reception screen of VICS displayed during the follow-up driving | running | working displayed with the navigation system which concerns on Embodiment 1 of this invention. It is a figure which shows the surrounding facility search screen displayed while stopping by the navigation system which concerns on Embodiment 1 of this invention. It is a figure which shows the screen of a periphery facility search result displayed during a stop displayed with the navigation system which concerns on Embodiment 1 of this invention. It is a figure which shows the surrounding facility search screen displayed during driving | running | working displayed with the navigation system which concerns on Embodiment 1 of this invention. It is a figure which shows the screen of a surrounding facility search result displayed during the follow-up driving | running | working displayed with the navigation system which concerns on Embodiment 1 of this invention. It is a flowchart which mainly shows the process which determines operation | movement of the navigation system which concerns on Embodiment 1 of this invention during driving | running | working, stopping and following driving | running | working driving | running | working. It is a flowchart which mainly shows the process which determines operation | movement of the navigation system which concerns on Embodiment 2 of this invention during driving | running | working, stopping, and following driving | running | working driving | running | working. It is a flowchart which shows the detail of the process during follow driving | running | working performed by the process shown in FIG. It is a flowchart which shows the detail of the process during driving | running | working performed by the process shown in FIG. It is a flowchart which shows the detail of the process during a stop performed by the process shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Follow driving control device, 2 Vehicle speed sensor, 3 Parking brake sensor, 4 GPS antenna, 5 Input device, 6 Navigation unit, 7 Display device, 11 CPU, 12 HDD, 13 GPS receiver, 21 Running state determination part, 22 Display Control unit, 23 input control unit, 24 own vehicle position determination unit, 25 map data acquisition unit, 26 peripheral facility search unit.

Claims (4)

A display device in which an information display area and operation buttons are formed on the screen;
A follow-up running control device for controlling follow-up running;
A sensor that detects whether the vehicle is stopped or traveling,
A traveling state determination unit that determines whether the vehicle is traveling, stopped, or following traveling based on a signal that represents the following state transmitted from the following traveling control device and a signal that is transmitted from the sensor; ,
When it is determined by the driving state determination unit that the vehicle has transitioned from driving to following driving, it is determined that the operation restriction imposed during driving has been released, and an operation button formed on the display device is A display control unit that displays the same number of operable buttons as when stopped,
A navigation system comprising: an input device for pressing an operation button displayed as a button operable on the display device under the control of the display control unit. The display control unit
When it is determined by the driving state determination unit that the vehicle has transitioned from driving to following driving, it is determined that the display restriction imposed during driving has been released, and the information display area of the display device indicates that the vehicle is stopped. The navigation system according to claim 1, wherein the same amount of information is displayed. The display control unit
An operation button formed on the display device when the travel state determination unit determines that the transition from running to follow-up running has been made, determining that some of the operation restrictions imposed during running have been lifted. The navigation system according to claim 1, wherein the navigation system is displayed as a number of operable buttons that are less than when the vehicle is stopped and when the vehicle is traveling. The display control unit
When it is determined by the driving state determination unit that the vehicle has transitioned from driving to following driving, it is determined that part of the display restriction imposed during driving has been released, and the information display area of the display device The navigation system according to claim 2, wherein the navigation system displays a smaller amount of information than when the vehicle is stopped.

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