JP2011135122A - In-vehicle machine and connection destination switching method in the in-vehicle machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an "in-vehicle machine and a connection destination switching method in the in-vehicle machine" for performing communication with only one of a plurality of opposite communication devices (cellular phone and camera or the like) without a pairing operation by merely providing one radio communication part. <P>SOLUTION: The in-vehicle machine includes: a telephone function of connecting a cellular phone to perform telephone communication through the radio communication part of the in-vehicle machine; and a display function of photographing the back scenery of a vehicle to display the photographed back scenery on a display device. In the in-vehicle machine, the radio part of a camera for photographing the back scenery of the vehicle and the radio part of the cellular phone are beforehand registered into the radio communication part of the in-vehicle machine as a pairing destination, respectively, communication is made to be possible only with the radio part of the camera in a state that the vehicle is put in reverse, and the communication is made to be possible only with the radio part of the cellular phone in a state that a gear is shifted in a position other than a back gear. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an in-vehicle device and a connection destination switching method in the in-vehicle device, and more particularly, in-vehicle that wirelessly connects to a mobile phone to make a phone call and wirelessly connects to a back view camera of the vehicle to acquire and display a camera image. The present invention relates to a connection destination switching method in a machine and an in-vehicle machine.

The in-vehicle device has an intelligent function, a hands-free function (car phone function), an in-vehicle navigation function, and an audio function. In such an in-vehicle device, the hands-free unit, the navigation unit, and the audio unit share one monitor and an operation unit, appropriately display an image for a predetermined unit on the monitor, and use the operation unit for the unit. It is like that.
A hands-free unit connects to a wireless mobile network via a mobile phone and communicates with the other party in a hands-free manner. Between the hands-free unit and the mobile phone, wireless communication means such as Bluetooth (Bluetooth: registered trademark) communication is used. The voice data and various control data are transmitted and received wirelessly by the unit. That is, each of the in-vehicle device and the mobile phone includes a Bluetooth communication unit, and transmits and receives audio data and various control data between the Bluetooth communication units.

  In order to enable communication between two predetermined Bluetooth communication units, it is necessary to pair these Bluetooth communication units. The pairing means that communication can be performed only between two Bluetooth communication units. The pairing operation is as follows: 1) The Bluetooth communication unit of the in-vehicle device searches for a Bluetooth device (such as a mobile phone having a Bluetooth communication function) existing in the area around the in-vehicle device and capable of Bluetooth communication. ) Display a list of searched Bluetooth devices, 3) Select a mobile phone to be used for hands-free telephone communication from the list, and 4) Enter a pass key (authentication key) of the mobile phone. To do. 5) Upon receiving the pass key, the Bluetooth communication unit of the in-vehicle device starts a known pairing sequence process with the selected mobile phone. 6) If pairing is established, Only allow communication. Once paired, the device number of the mobile phone is registered in the Bluetooth communication unit of the in-vehicle device. After that, the Bluetooth communication unit of the in-vehicle device automatically registers the mobile phone without performing the operations 1) to 5). Communicate with the phone.

  By the way, some in-vehicle devices include a back view display unit that captures a rear view of the vehicle and displays it on a monitor when the vehicle is back driven by a camera attached to the vehicle. According to this back view display unit, the driver's back driving can be assisted, and the driver can park the vehicle safely and surely in a parking lot or the like. However, there is a problem that the back view display unit is quite expensive in the case of a genuine product attached to the vehicle manufacturer. On the other hand, when retrofitting after purchase of a vehicle, the price can be kept relatively low, but there is a problem that there are many customers who refrain from installing the back view display unit due to wiring (wiring) as a bottleneck.

For this reason, a back view camera having a function of wirelessly transmitting image data of a captured camera image to an in-vehicle device by Bluetooth communication is being developed. According to the camera having the wireless communication function, the wiring does not become a bottleneck, but another problem arises. That is, the Bluetooth communication unit attached to the vehicle-mounted device can be paired with only one Bluetooth device at the same time, and cannot be paired simultaneously with two mobile phones and cameras. Therefore, it has been proposed to provide two Bluetooth communication units, or to provide an expensive Bluetooth communication unit that can be paired at the same time as two mobile phones and cameras, but this causes a problem of high cost.
Conventionally, there is a technology that enables communication between a large number of first communication devices and one second communication device (Patent Document 1). However, such a conventional technique has a problem in that the pairing operation needs to be performed every time the first communication device for communication changes, and the operation performance is poor.

JP 2002-95047 A

From the above, the object of the present invention is to provide only one inexpensive Bluetooth communication unit, and connect only to a predetermined one of a plurality of partner communication devices (cellular phones, cameras) without a pairing operation. To be able to communicate.
Another object of the present invention is to automatically switch the pairing destination of the Bluetooth communication unit to the back view camera automatically when the vehicle is back.
Another object of the present invention is to monitor the vehicle position and automatically communicate with the Bluetooth when the vehicle position coincides with the location of a parking operation such as a home parking lot or a facility parking lot such as a department store. The pairing destination of each part is switched preferentially to the back view camera.

The present invention relates to an in-vehicle device having a telephone function for making a call by connecting to a mobile phone via a wireless interface and a display function for displaying a rear landscape of a vehicle photographed by a camera attached to the vehicle, and a connection destination in the in-vehicle device Switching method.
In-vehicle device The first in-vehicle device of the present invention is pre-registered with the wireless unit of the camera and the wireless unit of the mobile phone as connection destinations respectively, and a wireless unit that communicates with only one of them, a state detection that detects the state of the vehicle And a control unit that connects the wireless unit only to the wireless unit of the camera based on the detected state, or connects the wireless unit only to the wireless unit of the mobile phone.
In the first vehicle-mounted device, the state detection unit is a vehicle gear state detection unit, and the control unit connects the wireless unit only to the wireless unit of the camera in a state where the vehicle gear is in the back, Control is performed so that the wireless unit is connected only to the wireless unit of the mobile phone in a state other than the back.
The second in-vehicle device of the present invention is pre-registered with the wireless unit of the camera and the wireless unit of the mobile phone as connection destinations, respectively, a wireless unit that communicates with only one of them, a vehicle position detection unit that detects the position of the vehicle, A monitoring unit that monitors whether a vehicle is present at a point that requires a parking operation. When the vehicle is present at a point that requires a parking operation, the wireless unit is connected only to the wireless unit of the camera, and the vehicle performs the parking operation. A control unit is provided that connects the wireless unit only to the wireless unit of the mobile phone when it does not exist at a required point.
The connection destination switching method in the in-vehicle device The first connection destination switching method of the present invention is the step of registering the radio unit of the camera and the radio unit of the mobile phone as the connection destinations in the radio unit on the vehicle side, and the gear state of the vehicle The detecting step is such that when the gear state is back, the vehicle radio unit is connected only to the camera radio unit, and when the gear is set to other than the back, the vehicle radio unit is connected only to the mobile phone radio unit. Controlling.
In the second connection destination switching method of the present invention, the step of registering the radio unit of the camera and the radio unit of the mobile phone as the connection destinations in the radio unit on the vehicle side, detecting the position of the vehicle, and the vehicle needs to perform a parking operation. A step of monitoring whether or not the vehicle is present at a point where the parking operation is required, the wireless unit of the vehicle is connected only to the wireless unit of the camera, and the vehicle is required to perform the parking operation. A step of controlling the radio unit of the vehicle to connect only to the radio unit of the mobile phone when it does not exist.

According to the present invention, the wireless unit of the camera and the wireless unit of the mobile phone are registered in advance in the wireless unit of the in-vehicle device as connection destinations, respectively, and based on the vehicle state, for example, the gear state whether or not the gear back state. Since it is possible to communicate only with the wireless part of the camera or only with the wireless part of the mobile phone, only one inexpensive Bluetooth communication part is provided, and a plurality of partners can be automatically connected without connection operation. It is possible to communicate with only one of the communication devices (mobile phone, camera) according to the vehicle state.
According to the present invention, the wireless unit of the camera and the wireless unit of the mobile phone are registered in advance in the wireless unit of the in-vehicle device as connection destinations, and based on whether or not the vehicle exists at a point that requires a parking operation. Since only communication with the wireless part of the camera is possible, or communication with only the wireless part of the mobile phone, only one inexpensive wireless part is provided, and it is possible to respond to the vehicle position without connection operation. Thus, it is possible to automatically communicate with only one of a plurality of counterpart communication devices (mobile phone, camera).
According to the present invention, since the back view image is automatically displayed on the monitor when the back view image is necessary even with an inexpensive configuration, the operation performance can be improved and the driver's back operation can be supported. Can do.

It is a block diagram of 1st Example of the vehicle equipment of this invention. It is a pairing destination determination process flow of 1st Example. It is a block diagram of 2nd Example of the vehicle equipment of this invention. It is a pairing destination determination process flow of 2nd Example.

(A) First Example (a) Configuration of On-vehicle Device FIG. 1 is an overall configuration diagram of an on-vehicle device according to a first example of the present invention. The in-vehicle device 1 includes a hands-free unit 11, a navigation unit 12, an audio unit 13, and a camera image display control unit 14, to which a display device 16 with a touch panel and an operation key unit 17 are connected via a user interface 15. . Further, the in-vehicle device 1 includes a Bluetooth communication unit (Bluetooth device) 20, and through the Bluetooth communication unit 20, only one of the mobile phone 2 incorporating the Bluetooth device and the rear view camera 3 incorporating the Bluetooth device similarly. By connecting, wireless communication is possible with the mobile phone 2 or the rear view camera 3. The rear view camera 2 is attached in the vicinity of the rear back number of the vehicle, captures the scenery behind the vehicle, and transmits the captured camera image data to the in-vehicle device 1 wirelessly.

  The Bluetooth communication unit 20 registers the mobile phone 2 and the rear view camera 3 as a pairing destination by performing a known pairing operation in advance under the control of the hands-free unit 11. That is, the Bluetooth communication unit 20 has previously registered device numbers such as the device numbers DI1 and DI2 for identifying the Bluetooth devices of the mobile phone 2 and the rear view camera 3 in the memory MM by the pairing operation, and the instructions from the hands-free unit 11 Accordingly, only one Bluetooth device is connected to communicate with the device.

  The hands-free unit 11 monitors the state of the vehicle and controls the Bluetooth communication unit 20 according to the vehicle state to instruct to make a wireless connection with one of the mobile phone 2 and the rear view camera 3. That is, the hands-free unit 11 monitors whether the vehicle is in the back state or in a gear state other than the back state based on the state detection signal input from the back gear state detection unit 30, and may be in a gear state other than the back state. For example, the Bluetooth communication unit 20 is instructed to establish a wireless communication connection with the mobile phone 2, and if in the back gear state, the Bluetooth communication unit 20 is instructed to establish a wireless communication connection with the rear view camera 3. As a result, when in a gear state other than the back gear, the Bluetooth communication unit 20 operates so as to be able to communicate only with the Bluetooth communication unit of the mobile phone 2, and thereafter hands-free by an incoming call or based on an outgoing operation. The unit 11 is connected to the mobile telephone network via the mobile phone 2 and can talk with a communication partner in a hands-free manner. On the other hand, in the back gear state, the Bluetooth communication unit 20 operates so as to be able to communicate only with the wireless communication unit of the rear view camera 3, and the image data sent from the rear view camera 3 is sent to the camera image display control unit 14. input.

When the camera image data captured by the rear view camera 2 is input, the camera image display control unit 14 performs predetermined image processing and inputs it to the display device 16. In the back gear state, the user interface 15 connects the camera image display control unit 14 to the display device 16 according to an instruction from the navigation unit 12. As a result, in the back gear state, the camera image display control unit 14 inputs the image processing result to the display device 16 and displays the scenery behind the vehicle.
The navigation unit 12 performs well-known navigation control to display a map around the vehicle on the display device 16, and performs in-vehicle navigation control for searching for a guidance route to the destination and guiding along the guidance route. When the navigation unit 12 is in the back gear state, the navigation unit 12 instructs the user interface 15 to connect the camera image display control unit 14 to the display device 16.
The audio unit 13 appropriately selects music from an audio source (not shown) such as a tuner or a CD player, ringing from a ringing tone generator, and voice from a communication partner input from the hands-free unit 11 from the speaker 18. In addition to outputting, the audio input from the microphone 19 is subjected to predetermined audio processing and input to the handsfree unit 11.

(B) Pairing Destination Determination Process FIG. 2 is a pairing destination determination process flow according to the first embodiment.
In advance, the Bluetooth device of the mobile phone 2 and the Bluetooth device of the rear view camera 3 are registered in the Bluetooth communication unit 20 of the in-vehicle device 10 as a pairing destination in advance by a pairing operation (step 100). Usually, the hands-free unit 11 instructs the Bluetooth communication unit 20 to use the mobile phone 2 as a pairing destination, whereby the Bluetooth communication unit 20 selects the mobile phone 2 as the pairing destination and communicates only with the mobile phone. It is possible (step 101). In such a state, the hands-free unit 11 is connected to the mobile telephone network via the mobile phone 2 by incoming call or based on a call origination operation and can talk with a communication partner in a hands-free manner.

  The hands-free unit 11 checks whether the vehicle is in the back state or a gear state other than the back state based on the state detection signal input from the back gear state detection unit 30 (step 102). If the gear state is other than the above, the process returns to step 101 to control to maintain the connection only with the mobile phone 2. However, if the back gear state is entered in step 102, the hands-free unit 11 checks whether a call is being made with the other party via the mobile phone 2 (step 103). Displays a message “no camera image displayed” on the display device 16 (step 104), and returns to step 103.

  In step 103, if the call is not being made or if the call is not being made, the hands-free unit 11 instructs the Bluetooth communication unit 20 to set the rear view camera 3 as a pairing destination, and the Bluetooth communication unit 20 sets the rear view camera 3 to the pairing destination. To enable transmission and reception of image data from the rear view camera. When the navigation unit 12 is in the back gear state, the navigation unit 12 instructs the user interface 15 to connect the camera image display control unit 14 to the display device 16. As described above, the rear view camera 3 inputs the image data of the rear landscape to the camera image display control unit 14 via the Bluetooth communication unit 20, and the camera image display control unit 14 performs predetermined image processing on the input image data. Then, the image processing result is input to the display device 16 to display the rear landscape of the vehicle (step 105).

Thereafter, the hands-free unit 11 checks whether the back gear state has been released and changed to another gear state (step 106). If the back gear state continues, the process returns to step 105 to continue displaying the rear landscape of the vehicle. To do. On the other hand, if the back gear state is released and another gear state is entered, the process returns to step 101, and the hands-free unit 11 instructs the Bluetooth communication unit 20 to use the mobile phone 2 as a pairing destination, whereby the Bluetooth communication unit 20 selects the mobile phone 2 as a pairing destination and enables communication only with the mobile phone.
Further, the navigation unit 12 instructs the user interface 15 to release the connection between the camera image display control unit 14 and the display device 16, and the user interface 15 thereby displays, for example, a navigation screen.

(B) Second Embodiment In the first embodiment described above, when the vehicle is in the back gear state, the pairing destination is switched from the mobile phone 2 to the rear view camera 3 to display the rear view of the vehicle. Can be configured to display the rear view of the vehicle by switching the pairing destination from the mobile phone 2 to the rear view camera 3 when the vehicle is present at a point requiring a parking operation.
FIG. 3 is a block diagram of the second embodiment in such a case, and the same parts as those in the block diagram of the first embodiment of FIG. A difference is that the back gear detection unit 30 in FIG. 1 is deleted, and the position detection unit 51 that detects the position of the vehicle in the navigation unit 12 exists at a point where the vehicle needs a parking operation (a parking operation required point). The monitoring unit 52 for monitoring the parking operation point and the parking operation point storage unit 53 for storing information for specifying the parking operation necessary point are provided.
The parking operation required point may be, for example, a home, a company parking lot, a parking lot of a facility that can be acquired from map data, or other registered points. It is necessary to store in the point storage unit 53.
FIG. 4 is a pairing destination determination process flow of the second embodiment.
The Bluetooth device of the mobile phone 2 and the Bluetooth device of the rear view camera 3 are registered in advance in the Bluetooth communication unit 20 of the in-vehicle device 10 as a pairing destination by a pairing operation (step 200). Normally, the hands-free unit 11 instructs the Bluetooth communication unit 20 to use the mobile phone 2 as a pairing destination, so that the Bluetooth communication unit 20 selects the mobile phone 2 as a pairing destination and communicates only with the mobile phone. It is possible (step 201). In such a state, the hands-free unit 11 is connected to the mobile telephone network via the mobile phone 2 by incoming call or based on a call origination operation and can talk with a communication partner in a hands-free manner.

In this state, the monitoring unit 52 of the navigation unit 12 monitors whether the vehicle position detected by the position detection unit 51 matches the parking operation necessary point stored in the parking operation point storage unit 53 (step 202). The monitoring result is input to the hands-free 11. If the vehicle position does not coincide with the parking operation required point, that is, if the vehicle does not exist at the parking operation required point, the hands-free 11 returns to step 201 and controls to maintain the connection only with the mobile phone 2. To do.
However, in step 202, if the vehicle position matches the parking operation required point, that is, if the vehicle exists at the parking operation required point, the hands-free unit 11 is in a call with the other party via the mobile phone 2. Is checked (step 203), and if a call is in progress, a message “camera image not displayed during call” is displayed on the display device 16 (step 204), and the process returns to step 203.

  In step 203, if the call is not being made or if the call is not being made, the hands-free unit 11 instructs the Bluetooth communication unit 20 to set the rear view camera 3 as a pairing destination, and the Bluetooth communication unit 20 sets the rear view camera 3 to the pairing destination. To enable transmission and reception of image data from the rear view camera. Note that the navigation unit 12 instructs the user interface 15 to connect the camera image display control unit 14 to the display device 16 when the vehicle position matches the parking operation required point. As described above, the rear view camera 3 inputs the image data of the rear landscape to the camera image display control unit 14 via the Bluetooth communication unit 20, and the camera image display control unit 14 performs predetermined image processing on the input image data. Then, the image processing result is input to the display device 16 to display the rear landscape of the vehicle (step 205).

Thereafter, the monitoring unit 52 of the navigation unit 12 monitors whether the vehicle has moved out of the parking operation required point, and notifies the hands-free 11 of the fact if the vehicle has moved out of the parking operation required point. As a result, the handsfree 11 returns to step 201, the handsfree unit 11 instructs the Bluetooth communication unit 20 with the mobile phone 2 as the pairing destination, and the Bluetooth communication unit 20 selects the mobile phone 2 as the pairing destination and Allows communication only with the phone.
Further, the navigation unit 12 instructs the user interface 15 to release the connection between the camera image display control unit 14 and the display device 16, and the user interface 15 thereby displays, for example, a navigation screen.
In the above embodiment, the back scenery is not displayed if a call is in progress even in the back gear state, but the back scenery is displayed regardless of whether the call is in progress or not in the back gear state. It can also be configured.
Once the back gear is set, the pairing destination can be controlled to be a camera until the vehicle is completely stopped regardless of the gear state, that is, until the parking operation is completed.

DESCRIPTION OF SYMBOLS 1 In-vehicle apparatus 2 Mobile phone 3 Rear view camera 11 Hands-free unit 12 Navigation unit 13 Audio unit 14 Camera image display control unit 15 User interface 16 Display device with a touch panel (monitor)
17 Operation key part 20 Bluetooth communication part 30 Back gear state detection part

Claims (5)

In an in-vehicle device having a telephone function for connecting to a mobile phone via a wireless interface and a display function for displaying a rear view of a vehicle photographed by a camera attached to the vehicle,
A wireless unit that is pre-registered as a connection destination with the wireless unit of the camera and the wireless unit of the mobile phone, and communicates with only one of them,
A state detector for detecting the state of the vehicle,
A control unit that connects the wireless unit only with the wireless unit of the camera based on the detected state, or that connects the wireless unit only with the wireless unit of the mobile phone,
An in-vehicle device characterized by comprising: The state detection unit is a vehicle gear state detection unit,
The control unit connects the radio unit only with the radio unit of the camera when the gear of the vehicle is in the back, and connects the radio unit only with the radio unit of the mobile phone when the gear is other than the back. Control,
The in-vehicle device according to claim 1. In an in-vehicle device having a telephone function for connecting to a mobile phone via a wireless interface and a display function for displaying a rear view of a vehicle photographed by a camera attached to the vehicle,
A wireless unit that is pre-registered as a connection destination with the wireless unit of the camera and the wireless unit of the mobile phone, and communicates with only one of them,
A vehicle position detector for detecting the position of the vehicle;
A monitoring unit that monitors whether a vehicle is present at a point requiring parking operation,
When the vehicle is present at a point where parking operation is required, the wireless unit is connected only to the wireless unit of the camera. When the vehicle is not present at a point requiring parking operation, the wireless unit is connected to the wireless unit of the mobile phone. Control unit to connect only with
An in-vehicle device characterized by comprising: In a connection destination switching method in an in-vehicle device having a telephone function for connecting to a mobile phone via a wireless interface and a display function for displaying a rear view of a vehicle photographed by a camera attached to the vehicle,
Register the wireless part of the camera and the wireless part of the mobile phone in the wireless part on the vehicle side as the connection destination,
Detects the gear state of the vehicle,
Controlling the vehicle wireless unit to be connected only to the wireless unit of the camera when the gear state is back, and connecting the wireless unit of the vehicle to only the wireless unit of the mobile phone in a state where the gear is other than the back;
A connection destination switching method in an in-vehicle device. In a connection destination switching method in an in-vehicle device having a telephone function for connecting to a mobile phone via a wireless interface and a display function for displaying a rear view of a vehicle photographed by a camera attached to the vehicle,
Register the wireless unit of the camera and the wireless unit of the mobile phone as the connection destination in the wireless unit on the vehicle side,
Detects the location of the vehicle, monitors if the vehicle is in a location that requires parking,
When the vehicle is present at a point requiring a parking operation, the wireless unit of the vehicle is connected only to the wireless unit of the camera. When the vehicle is not present at a point requiring a parking operation, the wireless unit of the vehicle is carried. Control to connect only to the wireless part of the phone,
A connection destination switching method in an in-vehicle device.

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