JP4649975B2 - Synchronization system between in-vehicle systems - Google Patents

Description

  The present invention relates to a synchronization system between in-vehicle systems, and more particularly, to a synchronization system between in-vehicle systems in which an audio system screen such as a DVD and a navigation system screen are appropriately switched and displayed on one display device.

In recent years, an audio system such as an AM / FM radio, a CD (Compact Disk) player, a DVD play, etc. and a navigation system (an in-vehicle audio / navigation system) have been mounted on vehicles (for example, see Patent Document 1). ).
Many of these electronic devices are unitized and can be connected to each other through a common signal line to construct an audio navigation system. In such an audio navigation system, each unit is centrally managed by a device called a head unit. The head unit is provided with an operation unit for centrally managing the states of other units.

JP 2000-138999 A

  However, among in-vehicle audio systems such as AM / FM radio, CD player, DVD play, etc., for example, it has been relatively recent that the DVD system has been installed in vehicles. For example, in order to easily incorporate a DVD system without significant changes to a conventional audio navigation system that does not include the DVD system, the conventional audio system and the DVD system are not incorporated in the audio system. Because the communication method differs between the existing audio system and the master unit on the audio system side, the DVD system side is also equipped with a master unit, and the existing audio system and the DVD system communicate with each other via a gateway. Need to connect.

  However, since the communication method is different between the existing audio system and the DVD system, the startup time may be shifted due to factors such as power fluctuations such as cranking. There was a problem of causing flickering.

  The present invention has been made paying attention to the above-mentioned conventional problems, and has a different communication system for one first system and a master unit separately from one system side. In a vehicle-mounted system in which one second system is connected for communication via a gateway and the second system screen and the first system screen are appropriately switched and displayed on one display device, a signal due to a difference in start-up time is displayed. It is an object of the present invention to provide a synchronization system between in-vehicle systems that can prevent the occurrence of missing or flickering on the screen.

  In order to achieve the above-mentioned object, the synchronization system between in-vehicle systems according to claim 1 of the present application has a different communication system for one first system and a master unit separately from the first system side. A second in-vehicle system comprising: a communication system connected via a gateway, wherein the first system screen and the second system screen are appropriately switched and displayed on one display device, The startup of the system is not managed after the startup power is turned on on the first system side of the first system and the second system that manages the screen of the display device. The second system is provided with a start completion signal transmitting means for transmitting a signal to be transmitted to the second system side. And a means, characterized in that the operation inhibiting means for inhibiting the operation of the system are provided.

  The synchronization system between in-vehicle systems according to claim 2 is the synchronization system between in-vehicle systems according to claim 1, wherein the activation completion signal from the activation completion signal transmitting means is within a predetermined time from when the activation power is turned on. The second system is provided with an activation confirmation request signal transmitting means for transmitting an activation completion confirmation request signal to the first system managing the screen of the display device if it is not transmitted to the first system. It was set as the characteristic feature.

  The synchronization system between in-vehicle systems according to claim 3 is the synchronization system between in-vehicle systems according to claim 1 or 2, wherein the second system is in an on state when the startup power is turned off. In such a case, the first system is provided with an on instruction signal transmitting means for transmitting the second system on instruction signal.

  The synchronization system between in-vehicle systems according to claim 4 is the synchronization system between in-vehicle systems according to any one of claims 1 to 3, wherein the first system is connected to the on instruction signal transmitting means. When the system on instruction signal is transmitted, the display device is switched to the second system screen, and when not transmitted within a predetermined time, the display is switched to the first system screen. It was.

  The synchronization system between in-vehicle systems according to claim 5 is the synchronization system between in-vehicle systems according to any one of claims 1 to 4, wherein the first system is a navigation system and the second system. Is an audio system.

  In the synchronization system between in-vehicle systems according to claim 1, as described above, the startup power is turned on to the first system side of the first system and the second system that manages the screen of the display device. And a start completion signal transmitting means for transmitting a signal for transmitting the completion of the system start to the second system side that is not managing the screen of the display device. The second system is started from the start completion signal transmitting means. By providing an operation prohibiting means for prohibiting the operation of the second system until the completion signal is received, it is possible to match the start timings between the two systems. The effect of preventing the occurrence of flickering can be obtained.

  Moreover, in the synchronous system between in-vehicle systems according to claim 2, as described above, when the activation completion signal from the activation completion signal transmitting means is not transmitted within a predetermined time from the activation power on, the display device The person who manages the screen of the display device is provided with the activation confirmation request signal transmitting means in the second system for transmitting the confirmation request signal of the activation completion to the first system side that manages the screen of Since the start completion signal for the first system can be newly received, the second system can be returned to normal even when only the second system is restarted due to power fluctuation or unit replacement. become able to.

  In the synchronous system between in-vehicle systems according to claim 3, as described above, when the second system is in the on state when the startup power is off, the second system is turned on in the first system. By providing an on instruction signal transmitting means for transmitting an instruction signal, the second system screen that is not managing the screen of the display device can be switched and displayed on the display device by this system on instruction signal. The second system screen that is not managing the screen of the display device can be restored to the screen display at the time of startup power-off.

  In the synchronization system between in-vehicle systems according to claim 4, as described above, when the system on instruction signal is transmitted from the on instruction signal transmitting means, the first system sets the display device to the second system. By switching to the screen and switching to the first system screen when it is not transmitted within a predetermined time, the first system can be activated even if the second system side is out of order.

  In the synchronization system between in-vehicle systems according to claim 5, the first system is a navigation system and the second system is an audio system, so that it is significantly more than an existing navigation system without an audio system such as a DVD. It is possible to easily incorporate an audio system such as a DVD without synchronizing and to synchronize the two systems.

  Embodiments of the present invention will be described below with reference to the drawings.

The synchronization system between the in-vehicle systems according to the first embodiment corresponds to the invention described in claims 1 to 5.
FIG. 1 is a system block diagram showing an in-vehicle audio / navigation system to which a synchronization system between in-vehicle systems according to the first embodiment is applied, and FIG. 2 shows a navigation system side in the in-vehicle system synchronization system according to the first embodiment. FIG. 3 is a flowchart showing control contents on the DVD system side in the synchronization system between in-vehicle systems according to the first embodiment.

The in-vehicle audio navigation system to which the synchronization system between in-vehicle systems of the first embodiment is applied has a different communication method with respect to the navigation system (first system) 1 and is a master separately from the navigation system 1 side. A DVD system (second system) 2 having a unit is communicatively connected via a gateway (G / W) 3, and a DVD system screen, a navigation system screen (see FIG. 4), and a navigation system are connected to one display device 4. The television (TV) and video (VTR) screens incorporated on one side are appropriately switched and displayed.
FIG. 5 shows the DVD system screen (DVD playback menu selection screen), and operation menus showing various operation contents such as an operation menu such as playback, stop, and sound quality adjustment, a DVD menu, and a title menu are displayed on the screen. ing.

  The master unit is a unit that controls almost all units in the system, and peripheral components such as the display device (front monitor, rear monitor) 4, video distributor, TV tuner, and the like are paired with the master unit. 1, the master unit issues an instruction to each peripheral component to perform screen switching and voice switching control of the display device 4.

  The navigation system 1 employs the J1850 communication system, the DVD system 2 employs the CAN communication system, and the two communication systems differ in communication speed, interface circuit, command, etc., so the gateway (G / W) 3, the communication command is converted and transmitted to another communication method side.

  More specifically, the navigation system 1 managing the screen of the display device 4 manages the completion of activation of the navigation system 1 after the activation power supply (ACC) is turned on. There is provided a start completion signal transmitting means for transmitting a signal to be transmitted to the non-DVD system 2 side.

  Further, the DVD system 2 has an operation prohibiting means for prohibiting the operation of the DVD system 2 until the start completion signal is received from the start completion signal transmitting means, and the DVD system 2 is in an on state when the start power is turned off. In some cases, an on instruction signal transmitting means for transmitting a system on instruction signal to the navigation system 1 managing the screen of the display device 4 is provided.

  If the activation completion signal from the activation completion signal transmitting means is not transmitted within a predetermined time from the activation power-on, a confirmation request for activation completion is sent to the navigation system 1 managing the screen of the display device 4. An activation confirmation request signal transmission means for transmitting a signal is provided in the DVD system 2 that does not manage the screen of the display device 4.

  Further, the DVD system 2 that does not manage the screen of the display device 4 includes a navigation system 1 that manages the screen of the display device 4 when the DVD system 2 is on when the startup power is turned off. Is provided with an on instruction signal transmitting means for transmitting a system on instruction signal.

  Further, the navigation system 1 that manages the screen of the display device 4 is a DVD system that does not manage the screen of the display device 4 when the system-on instruction signal is transmitted from the on-instruction signal transmission means. The screen is switched to the screen of the navigation system 1 that manages the screen of the display device 4 when the screen is not transmitted within a predetermined time.

Next, the contents of inter-system synchronization control in the navigation system 1 and the DVD system 2 will be described based on the flowcharts of FIGS.
First, the contents of inter-system synchronization control on the navigation system 1 side will be described based on the flowchart of FIG.

  In step S101 in FIG. 2, it is determined whether or not the startup power supply (ACC) is turned on. When the startup power supply is turned on, the process proceeds to step S102 to determine whether the startup power supply has been switched from the OFF state to the ON state. If it is determined that the switch has been switched from the OFF state to the ON state, the process proceeds to step S103 to perform initialization processing of the navigation system 1, and in the subsequent step S104 (start-up completion signal transmission means) After transmitting an external input standby (AUX STANDBY) “1” signal informing that the navigation system 1 has started, the process proceeds to step S106.

  When the determination in step S102 is NO (when the ON state is continued), the process proceeds to step S106 with the operation of the navigation system being continued in step S105. If the determination in step S101 is NO (start-up power supply OFF), the control is maintained in the OFF state in step S116, and one control flow is completed.

  In step S106, it is determined whether or not an external input standby (AUX STANDBY) signal request from the DVD system 2 has been received. If received, the process proceeds to step S107 and an external input standby (AUX STANDBY) "1" signal is sent. After transmitting again, it progresses to step S108, and when not receiving, it progresses to step S108 as it is.

  In step S108, it is determined whether or not the external input (AUX) (last mode AUX) was made when the startup power supply was turned off. If YES (last mode AUX), the process proceeds to step S109. If NO, the process proceeds to step S115. After proceeding and switching to the navigation screen, this completes one control flow.

  In step S109, it is determined whether or not the external input mode (last mode) when the startup power is OFF is TV or video (TVorVTR). If YES (TVorVTR), the process proceeds to step S110 to switch to the TVorVTR screen. This completes one control flow, and if NO, the process proceeds to step S111.

In step S111, it is determined whether or not a DVD ON instruction signal from the DVD system 2 has been received. If received, the process proceeds to step S112 to switch to the DVD screen, and this completes one control flow. To do.
If the DVD ON instruction signal has not been received, the process proceeds to step S113, the reception timer is counted up, and then the process proceeds to step S114. In this step S114, it is determined whether or not the reception timer has timed up. If the time has expired, the process proceeds to step S115, and after switching to the navigation screen, one control flow is completed. If the time is not up, the process returns to step S111.

Next, the contents of inter-system synchronization control on the DVD system 2 side will be described based on the flowchart of FIG.
In step S201 in FIG. 3, it is determined whether or not the start-up power supply (ACC) is turned on. When the start-up power supply is turned on, the process proceeds to step S202, whether the start-up power supply has been switched from the OFF state to the ON state. When it is determined whether or not the operation is continued and the state is switched from the OFF state to the ON state, the process proceeds to step S203 to perform initialization processing of the DVD system 2, and in the subsequent step S204 (operation prohibiting means), the DVD system 2 is activated. After a process for temporarily prohibiting the operation of the DVD system is performed, the process proceeds to step S206.

  When the determination in step S202 is NO (when the ON state is continued), the process proceeds to step S206 with the operation of the navigation system being continued in step S205. If the determination in step S101 is NO (start-up power supply OFF), the control state is maintained in the OFF state in step S20, and one control flow is completed.

In step S206, it is determined whether or not an external input standby (AUX STANDBY) “1” signal indicating that the navigation system 1 has been activated has been received from the navigation system 1 side. After permitting the operation of the system 2, the process proceeds to step S210.
When the external input standby (AUX STANDBY) “1” signal is not received, the process proceeds to step S207 to determine whether or not 10 seconds have elapsed since the start-up power supply (ACC) was turned on. If so, the process proceeds to step S208 (startup confirmation request signal transmission means) to transmit a signal for requesting an external input standby (AUX STANDBY) signal to the navigation system 1, and then the process returns to step S206.
If 10 seconds have not elapsed since the start-up power supply (ACC) was turned on, the process directly returns to step S206.

  In step S210, it is determined whether or not the external input mode (last mode) when the startup power is OFF is the DVD ON state. If the DVD is in the ON state, the process proceeds to step S211 to start the DVD system. In the subsequent step S212 (ON instruction signal transmission means), a DVD ON instruction signal is transmitted to the navigation system 1, and this completes one control flow. When the DVD is in the OFF state, it remains in the OFF state. This completes one control flow.

Next, functions and effects of the first embodiment will be described.
In the audio navigation system to which the in-vehicle inter-system synchronization system according to the first embodiment is applied, the navigation power is turned on after the activation power is turned on to the navigation system 1 managing the screen of the display device 4 as described above. The DVD system 2 that does not manage the screen of the display device 4 is provided with a start completion signal transmission means for transmitting a signal that tells the DVD system 2 that does not manage the screen of the display device 4 that the start of the system 1 is completed. By providing the operation prohibiting means for prohibiting the operation of the DVD system 2 until the activation completion signal is received from the activation completion signal transmitting means, the activation timings between the systems 1 and 2 can be matched.
Accordingly, a DVD system 2 having a different communication system with respect to the navigation system 1 and having a master unit separately from the navigation system 1 side is connected for communication via the gateway 3, and a DVD system screen and one display device 4 are connected to each other. In a vehicle-mounted system in which a navigation system screen and a television (TV) and video (VTR) screen incorporated on the navigation system 1 side are appropriately switched and displayed, a signal due to a difference in startup time between the systems is displayed. An effect is obtained that it is possible to prevent the occurrence of missing or flickering of the screen.

  Further, when the activation completion signal from the activation completion signal transmitting means is not transmitted within a predetermined time since the activation power is turned on, an activation completion confirmation request signal is sent to the navigation system 1 managing the screen of the display device 4. The activation confirmation request signal transmitting means to be transmitted is provided in the DVD system 2 that does not manage the screen of the display device 4, thereby newly receiving the activation completion signal of the navigation system 1 that manages the screen of the display device 4. Therefore, even when only the DVD system 2 that does not manage the screen of the display device 4 is restarted due to power fluctuation, unit replacement, etc., the DVD that does not manage the screen of the display device 4 The system 2 can be returned to normal.

  Further, in the DVD system 2 that does not manage the screen of the display device 4, when the DVD system 2 is in the on state when the startup power is turned off, the display device 4 is displayed in the navigation system 1 that manages the screen of the display device 4. By switching on a DVD screen that does not manage the screen of the display device 4 by this system on instruction signal, the DVD screen that does not manage the screen is switched to the display device 4 As a result, a DVD screen that does not manage the screen of the display device 4 can be returned to the screen display at the time of startup power-off.

  Further, the navigation system 1 that manages the screen of the display device 4 is a DVD screen that does not manage the screen of the display device 4 when the system on instruction signal is transmitted from the on instruction signal transmission means. If it is not transmitted within a predetermined time, the DVD system 2 side that does not manage the screen of the display device 4 breaks down by switching to the navigation system screen that manages the screen of the display device 4. Even in such a case, the navigation system 1 that manages the screen of the display device 4 can be activated.

  In the synchronization system between in-vehicle systems according to claim 5, one system is the navigation system 1 and the other system is the DVD system 2, which greatly increases the existing navigation system 1 without the DVD system 2. The DVD system 2 can be easily incorporated without making any changes and the two systems 1 and 2 can be synchronized.

As described above, the embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and the present invention can be applied even if there are design changes and the like without departing from the scope of the present invention. included.
For example, in the embodiment, the synchronization between the navigation system 1 and the DVD system 2 has been described as an example, but the present invention can be applied to the case where all systems are synchronized. For example, system synchronization can be performed between a television system and a DVD system, between a video system and a CD system, or the like.

  In the embodiment, the screen of the display device 4 is managed on the navigation system 1 side. However, the screen of the display device 4 may be managed on the DVD system 2 side.

It is a system block part which shows the vehicle-mounted audio navigation system to which the synchronous system between the vehicle-mounted systems of Example 1 was applied. It is a flowchart which shows the control content by the side of the navigation system in the synchronous system between the vehicle-mounted systems of Example 1. FIG. 4 is a flowchart showing control contents on the DVD system side in the synchronization system between in-vehicle systems of the first embodiment. It is a navigation system screen in the synchronous system between the vehicle-mounted systems of Example 1. It is a DVD system screen (DVD reproduction menu selection screen) in the synchronous system between the vehicle-mounted systems of Example 1.

Explanation of symbols

1 Navigation system (first system)
2 DVD system (second system)
3 Gateway 4 Display device

Claims (5)

The other second system having a different communication system with respect to the first system and having the master unit separately from the first system side is connected for communication via a gateway, and the first system is connected to the first system. An in-vehicle system that switches between a system screen and a second system screen as appropriate,
The startup of the first system is not managed after the startup power is turned on to the first system that manages the screen of the display device of the first system and the second system. And a start completion signal transmitting means for transmitting a signal to be transmitted to the second system side.
The synchronization system between in-vehicle systems, wherein the second system is provided with operation prohibiting means for prohibiting the operation of the second system until a start completion signal is received from the start completion signal transmitting means. .   When the activation completion signal from the activation completion signal transmitting means is not transmitted within a predetermined time from the activation power-on, the activation completion confirmation request signal is sent to the first system managing the screen of the display device 2. The synchronization system between in-vehicle systems according to claim 1, wherein the second system is provided with a start confirmation request signal transmitting means for transmitting   The second system includes an on instruction signal transmitting means for transmitting the second system on instruction signal to the first system when the second system is in an on state when the startup power is off. The synchronization system between in-vehicle systems according to claim 1 or 2.   The first system switches the display device to the second system screen when the system on instruction signal is transmitted from the on instruction signal transmission means, and displays the first system screen when it is not transmitted within a predetermined time. It is comprised so that it may switch, The synchronous system between the vehicle-mounted systems of Claim 3 characterized by the above-mentioned.   The synchronization system between in-vehicle systems according to any one of claims 1 to 4, wherein the first system is a navigation system and the second system is an audio system.