JP2006335237A - On-vehicle equipment and its mode switching method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the risk that safety driving is obstructed when a driver's attention is distracted by an on-vehicle equipment such as a car navigation system and an on-vehicle television receiver. <P>SOLUTION: It is determined whether or not the vehicle is during traveling (step S2) and when the vehicle is not during traveling, it is switched to a mode during stopping (step S3). It is determined whether or not a sending direction of a remote control 16 is in a driver's seat direction (step S5) and when it is in a direction other than the driver's seat direction, it is switched to an occupant mode (step S6). When it is in the driver's direction, it is determined whether or not the sending position of the remote control is the driver's seat (step S9). Further, when the sending position of the remote control is the driver's seat, it is switched to a driver mode (step S10). Thereby, a part of operation by the occupant during traveling is restricted, and the risk that the safety driving is obstructed by the distraction of the driver's attention can be eliminated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an in-vehicle device such as a car navigation system and an in-vehicle television receiver.

  In recent years, this type of in-vehicle equipment has become widespread, and if TV broadcasting is digitized in the future, it is expected that the spread will be spurred. One thing that is always a concern in the specifications of such in-vehicle devices is ensuring safety against use by the driver while traveling.

Conventionally, as a technique for ensuring this safety, a method of invalidating key input by a driving driver has been proposed (for example, see Patent Document 1). That is, in this method, first, whether the person operating the in-vehicle device is a driver or a passenger is estimated from the fixed position (whether the driver's seat side or the passenger's seat side) of the in-vehicle device. When the passenger is operating the in-vehicle device, the key input becomes effective regardless of whether the passenger is traveling or stopped. On the other hand, when the driver is operating the in-vehicle device, the key input is valid when the vehicle is stopped, but the key input is invalid when the vehicle is traveling. Thereby, the safety | security with respect to the use by the driver | operator during driving | running | working is ensured.
JP 2001-174268 A (columns [0028] to [0034], FIG. 3)

  However, this has the following disadvantages.

  First, when the passenger is operating the in-vehicle device, the function of the in-vehicle device is not limited even during traveling, so the passenger may adjust the volume and screen brightness. In this case, there is a risk that the driver is distracted and disturbs safe driving.

  Secondly, since it is estimated from the fixed position of the vehicle-mounted device whether the person operating the vehicle-mounted device is a driver or a passenger, it is impossible to distinguish between the driver and the passenger in the rear seat. In addition, the movement of the in-vehicle device (change of the fixed position) is troublesome, so when using the in-vehicle device fixed on the passenger seat side in the driver's seat, or conversely, the in-vehicle device fixed on the driver seat side. However, it is not possible to fully handle these cases. Therefore, there is a risk that the driver may be able to operate and the driving may be neglected, or the passenger may be unable to operate and feel inconvenienced.

  An object of this invention is to provide the vehicle equipment and its mode switching method which can eliminate such a problem.

First, the invention of the in-vehicle device according to claim 1 is an in-vehicle device that operates a device main body mounted on a vehicle with a remote control, and remote control transmission position detection means for determining whether or not the transmission position of the remote control is a driver seat; Passenger mode switching means for switching the device main body to the passenger mode when the remote control transmission position is not the driver seat, and a driver for switching the device main body to the driver mode when the remote control transmission position is the driver seat And a mode switching means.
According to a second aspect of the present invention, there is provided an in-vehicle device according to a second aspect of the present invention, in an in-vehicle device that operates a device main body mounted on a vehicle with a remote controller, a traveling determination unit that determines whether or not the vehicle is traveling, and the vehicle is traveling In the case where the device body is not in the stationary mode, the stationary mode switching means, the remote control transmission position detecting means for determining whether or not the transmission position of the remote control is the driver's seat, and the remote control transmission position is not the driver's seat Passenger mode switching means for switching the device main body to the passenger mode, and driver mode switching means for switching the device main body to the driver mode when the transmission position of the remote control is a driver seat. It is characterized by.
According to a third aspect of the present invention, the remote controller includes a remote control light emitting unit, the device main body includes a pair of main body light receiving units that are separated from each other in the horizontal direction, and the remote control transmission position detection unit includes: The transmission direction of the remote control is calculated based on the arrival time difference between the control signals input from the remote control light emitting unit to the main body light receiving units, and it is determined from the transmission direction whether the transmission position of the remote control is a driver's seat. It is characterized by that.
According to a fourth aspect of the present invention, there is provided the vehicle-mounted device, wherein the main body light receiving unit is attached to both ends of the device main body in the horizontal direction.
According to a fifth aspect of the present invention, the device main body includes a main body light emitting unit, the remote control includes a remote control light receiving unit, and the remote control transmission position detecting means receives the control signal and receives the control signal. The transmission distance of the remote control is calculated based on the arrival time of the response signal input from the light emitting unit to the remote control light receiving unit, and it is determined from the transmission distance whether the transmission position of the remote control is a driver's seat or not. To do.
The invention of the in-vehicle device according to claim 6 is characterized in that, in the passenger mode, adjustment of volume and screen brightness of the device main body is restricted.
The invention of the in-vehicle device according to claim 7 is characterized in that, in the driver mode, the operation of the remote controller becomes invalid and a warning is issued when the device main body receives an emergency broadcast.
An invention of a mode switching method for an in-vehicle device according to claim 8 is a mode switching method for an in-vehicle device in which a device main body mounted on a vehicle is operated by a remote control, and whether or not the transmission position of the remote control is a driver's seat. A remote control transmission position detecting step of determining, a passenger mode switching step of switching the device main body to a passenger mode when the remote control transmission position is not a driver seat, and a remote control transmission position of the remote controller is a driver seat A driver mode switching step of switching the device main body to the driver mode.
The invention of a mode switching method for an in-vehicle device according to claim 9 is a mode switching method for an in-vehicle device in which a device main body mounted on a vehicle is operated by a remote controller, and determines whether or not the vehicle is running. A traveling determination step, a stationary mode switching step of switching the device main body to a stationary mode when the vehicle is not traveling, a remote control transmission position detection step of determining whether or not the transmission position of the remote control is a driver seat; Passenger mode switching step for switching the device main body to passenger mode when the remote control transmission position is not the driver seat, and a driver for switching the device main body to driver mode when the remote control transmission position is the driver seat And a mode switching step.
According to a tenth aspect of the present invention, the remote control includes a remote control light emitting unit, the device main body includes a pair of main body light receiving units that are separated from each other in the horizontal direction, and the remote control transmission position. In the detection step, the transmission direction of the remote controller is calculated based on the arrival time difference between the control signals input from the remote control light emitting unit to each of the main body light receiving units, and from this transmission direction, whether the remote control transmission position is the driver's seat It is characterized by determining whether or not.
According to an eleventh aspect of the present invention, there is provided an in-vehicle device mode switching method, wherein the main body light receiving unit is attached to both ends of the device main body in the horizontal direction.
In the vehicle device mode switching method according to a twelfth aspect of the present invention, the device main body includes a main body light emitting unit, the remote controller includes a remote control light receiving unit, and in the remote control transmission position detection step, the control signal In response, the transmission distance of the remote control is calculated based on the arrival time of the response signal input from the main body light emitting section to the remote control light receiving section, and it is determined from this transmission distance whether or not the transmission position of the remote control is the driver's seat It is characterized by doing.
The invention of a mode switching method for an in-vehicle device according to claim 13 is characterized in that adjustment of the volume and screen brightness of the device body is restricted in the passenger mode.
Further, the invention of the mode switching method of the in-vehicle device according to claim 14 is characterized in that, in the driver mode, the operation of the remote controller is invalid and a warning is issued when the device main body receives an emergency broadcast. And

  According to the present invention, a part of the operation by the traveling passenger is restricted, so that it is possible to eliminate the risk of disturbing the safe driving by distracting the driver.

  In addition, since the driver and passengers can be clearly distinguished, it is possible for the driver to be able to perform operations and make driving difficult, or the passengers cannot operate the passengers and feel inconvenienced. Can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of a car navigation system according to the present invention, FIG. 2 is a use state diagram of the car navigation system shown in FIG. 1, and FIG. 3 is a flowchart of a mode switching program.

  As shown in FIG. 1, the car navigation system 1 has a device main body 2, and a main microcomputer 3 is built in the device main body 2. The main microcomputer 3 includes an antenna 5 for digital terrestrial television broadcasting, a vibration sensor 6 for detecting vibration of the chassis, a memory 7 in which map information, a mode switching program PRG shown in FIG. The main body light emitting unit 9 that transmits a response signal (ACK signal) to the remote controller 16 described later and the pair of main body light receiving units 10 and 11 that receive control signals from the remote controller 16 are connected to each other. Stored inside. In addition, the main microcomputer 3 has a GPS antenna 12 for three-dimensional positioning of the vehicle by GPS (Global Positioning System), a monitor 13 for displaying map information and a TV broadcast screen, and various controls of the vehicle. It can be connected to the car microcomputer 15 that manages it. The car microcomputer 15 is connected to a vehicle speed pulse sensor 18 that detects the rotational speed of the wheel and calculates the vehicle speed. Here, as shown in FIG. 2, the pair of main body light receiving units 10 and 11 are separated from each other in the horizontal direction in a form attached to both ends in the horizontal direction (left and right direction) of the device main body 2.

  Further, as shown in FIG. 1, the car navigation system 1 includes a bidirectional communication type remote controller (remote controller) 16 for operating the device main body 2 from each seat of the car. Is built-in. The microcomputer 17 includes an operation key 19 for inputting various operations, a remote control light emitting unit 20 that transmits a control signal toward the device main body 2, and a remote control light receiving unit 21 that receives a response signal from the device main body 2. Is connected.

  Since the car navigation system 1 has the configuration as described above, in order to mount the car navigation system 1 in a car, as shown in FIG. Attach the monitor 13 to the device main body 2. Then, one main body light receiving unit 10 is positioned on the passenger seat side, and the other main body light receiving unit 11 is positioned on the driver side. Further, the GPS antenna 12 is attached inside or outside the vehicle and connected to the device main body 2. Further, the device body 2 is connected to the car microcomputer 15.

  Thereafter, the user setting information is written in the memory 7 prior to use of the car navigation system 1. Here, the user setting information includes the mounting position of the handle 23 (whether it is the right handle or the left handle), the seat arrangement (whether it is a 2-row seat or 3-row seat, a 2-seat seat or a 3-seat seat), and the device body 2 Means information on the position (direction and distance) of each seat viewed from the above.

  For example, if the car equipped with the car navigation system 1 is a right-hand drive car with two seats and two rows of seats (four-seater) as shown in FIG. The positions of the seat T1, the passenger seat T2, the rear row upper seat T3, and the rear row lower seat T4 are (+ 45 °, 30 cm), (−45 °, 30 cm), (+ 30 °, 100 cm), (−30 °, 100 cm), respectively. To do. In addition, when the car equipped with the car navigation system 1 is a left-hand drive car with two seats and three rows of seats (six passengers) as shown in FIG. The positions of the seat T1, the passenger seat T2, the center row upper seat T3, the center row lower seat T4, the rear row upper seat T5, and the rear row lower seat T6 are (−45 °, 30 cm), (+ 45 °, 30 cm), (−30, respectively. (°, 90 cm), (+ 30 °, 90 cm), (−20 °, 150 cm), (+ 20 °, 150 cm). Furthermore, when the car equipped with the car navigation system 1 is a right-hand drive car with two to three seats and two rows of seats (five seats) as shown in FIG. 6, the mounting position of the handle 23 is set to “right”. The positions of the driver seat T1, the passenger seat T2, the rear row upper seat T3, the rear row central seat T7, and the rear row lower seat T4 are (+ 45 °, 30 cm), (−45 °, 30 cm), (+ 30 °, 90 cm), ( ± 0 °, 80 cm) and (−30 °, 90 cm).

  And when this driver | operator and a passenger use this car navigation system 1, the operation key 19 of the remote control 16 is pushed. Then, the microcomputer 17 of the remote controller 16 outputs a control signal from the remote controller light emitting unit 20 toward the main body light receiving units 10 and 11 of the device main body 2.

  When this control signal is input to the main body light receiving units 10 and 11 of the device main body 2, the main microcomputer 3 outputs a response signal from the main body light emitting unit 9 to the remote control light receiving unit 21 and the mode switching program PRG. Are read from the memory 7 and various operations are executed based on the mode switching program PRG.

  That is, the main microcomputer 3 first detects the presence or absence of vibration of the chassis via the vibration sensor 6 and detects the vehicle speed via the vehicle speed pulse sensor 18 (step S1 of the mode switching program PRG).

  Next, the main microcomputer 3 determines whether or not the vehicle is traveling based on these detection data (step S2 of the mode switching program PRG). That is, the main microcomputer 3 determines that the vehicle is traveling when the chassis is vibrating, and determines that the vehicle is not traveling (stopped) when the chassis is not vibrating. The main microcomputer 3 determines that the vehicle is not traveling (stopped) when the vehicle speed is zero, and determines that the vehicle is traveling when the vehicle speed is other than zero. In this way, the determination as to whether or not the vehicle is traveling is executed based on two types of detection data (whether vehicle chassis vibration and vehicle speed), so that a highly reliable determination result is obtained.

  If it is determined that the vehicle is not running, the main microcomputer 3 stops the device main body 2 because there is no possibility of disturbing safe driving regardless of whether the user of the remote controller 16 is a driver or a passenger. Switching to the middle mode (full mode) (step S3 of the mode switching program PRG). When the vehicle is switched to the stop mode in this way, the user of the remote controller 16 can use all the functions of the car navigation system 1 without restriction.

  On the other hand, when it is determined that the car is running, the function of the car navigation system 1 must be appropriately limited depending on whether the user of the remote controller 16 is a driver or a passenger.

  Accordingly, the main microcomputer 3 calculates the transmission direction of the remote controller 16 based on the arrival time difference between the control signals input to the pair of main body light receiving units 10 and 11 (steps S4 and S5 of the mode switching program PRG). That is, when the arrival time difference between the control signals is positive (plus), the distance L2 from the main body light receiving unit 11 on the driver side to the remote control 16 is smaller than the distance L1 from the main body light receiving unit 10 on the passenger seat side to the remote control 16. Therefore, the main microcomputer 3 calculates the transmission direction of the remote controller 16 as the driver seat direction. On the other hand, when the arrival time difference of the control signal is negative (minus) or zero, the distance from the main body light receiving unit 10 on the passenger seat side to the remote control 16 is greater than the distance L2 from the main body light receiving unit 11 on the driver side to the remote control 16. Since L1 is shorter or both distances L1 and L2 are equal, the main microcomputer 3 calculates the transmission direction of the remote controller 16 as a direction other than the driver seat direction (passenger seat direction or center seat direction). . At this time, since the pair of main body light receiving units 10 and 11 are attached to both ends of the device main body 2 in the horizontal direction, the arrival time difference of the control signals can be amplified to the maximum. As a result, the operation of calculating the transmission direction of the remote controller 16 is performed with high accuracy.

  If it is calculated that the direction of transmission of the remote controller 16 is a direction other than the driver's seat direction, the user of the remote controller 16 is a passenger (in the four-seater car shown in FIG. Two people sitting in T4, in the six-seater car shown in FIG. 5, three people sitting in the passenger seat T2, center row lower seat T4, rear row lower seat T6, in the five-seater car shown in FIG. , The main microcomputer 3 switches the device body 2 to the passenger mode (partially restricted mode) (mode switching). Step S6) of the program PRG. When the mode is switched to the passenger mode in this way, adjustment of the volume and screen brightness of the device main body 2 is restricted. Therefore, it is possible to eliminate the risk of disturbing the safe driving by distracting the driver.

  On the other hand, when it is calculated that the transmission direction of the remote controller 16 is the driver's seat direction, it is unknown whether the user of the remote controller 16 is a driver or a passenger. For example, in the four-seater car shown in FIG. 4, it is not clear whether the person is sitting in the driver's seat T1 or the person sitting in the rear row upper seat T3. In the six-seat car shown in FIG. 5, it is clear whether the person is sitting in the driver's seat T1, the person sitting in the center row upper seat T3, or the person sitting in the rear row upper seat T5. do not do. Furthermore, in the five-seater car shown in FIG. 6, it is not clear whether the person is sitting in the driver's seat T1 or the person sitting in the rear row upper seat T3.

  Therefore, the main microcomputer 3 instructs the microcomputer 17 to transmit the transmission distance of the remote controller 16 (the distance from the device body 2 to the remote controller 16) L3. In response to this, the microcomputer 17 calculates the transmission distance L3 of the remote controller 16 based on the time from the output of the control signal to the input of the response signal, and transmits this transmission distance L3 to the main microcomputer 3 side (mode switching program PRG). Step S7). Since the transmission distance L3 of the remote controller 16 does not have to be accurately calculated to the millimeter unit, error information between the distance L1 from the main body light receiving unit 10 to the remote control 16 and the distance L2 from the main body light receiving unit 11 to the remote control 16 Need not be superimposed on the transmission distance L3 of the remote controller 16.

  In response to the transmission distance L3 of the remote controller 16, the main microcomputer 3 obtains the position of the transmission source (remote controller 16) (steps S8 and S9 of the mode switching program PRG). That is, the main microcomputer 3 reads the user setting information from the memory 7 and compares the distance from the driver's seat T1 to the device body 2 with the transmission distance L3 of the remote controller 16. As a result, if both are substantially the same, the main microcomputer 3 regards the driver's seat T1 as a transmission source. If the latter is larger than the former, the main microcomputer 3 regards the rear row upper seat T3 or the rear row upper seat T5 as the transmission source.

  If the source is regarded as the rear row upper seat T3 or the rear row upper seat T5, the user of the remote control 16 is a passenger in any case, so the main microcomputer 3 sets the device body 2 in the passenger mode. (Step S6 of the mode switching program PRG).

  On the other hand, when the caller is considered to be the driver's seat T1, the user of the remote controller 16 is the driver, so the main microcomputer 3 switches the device body 2 to the driver mode (operation restriction mode) (mode Step S10 of the switching program PRG). When switching to the driver mode in this way, the operation of the remote controller 16 becomes invalid, and the driver cannot use any function of the car navigation system 1. Therefore, the driver is forced to give up the subsequent operation, and as a result, safe driving is ensured. However, when the device main body 2 receives the emergency broadcast, the main microcomputer 3 issues a warning that the emergency broadcast has been received and prompts the vehicle to stop. This emergency broadcast includes traffic jam broadcasts, accident information, serious news, and the like. Also, warnings may be sound or video. And if a driver stops according to this warning, since apparatus main part 2 will switch to a stop mode, it will become possible to watch emergency broadcasting. Therefore, even if the mode is switched to the driver mode, there is no fear that urgent information obtained by the emergency broadcast is not obtained.

  In this way, when the remote controller 16 is used, it is possible to clearly distinguish whether the user of the remote controller 16 is a driver or a passenger based on the transmission direction and the transmission distance L3 of the remote controller 16. . Therefore, it is possible to prevent the occurrence of a situation in which the operation by the driver becomes possible and the driving is neglected, or the operation by the passenger becomes impossible and the inconvenience is felt.

  In the above-described embodiment, the case where it is determined whether or not the vehicle is traveling based on the presence or absence of vibration of the chassis or the vehicle speed has been described, but various other methods for determining whether or not the vehicle is traveling are conceivable. . For example, the state of the parking brake (hand brake, foot brake) is monitored. When the parking brake is activated, it is determined that the vehicle is not traveling, and when the parking brake is released, it is determined that the vehicle is traveling. It may be. Alternatively, the position of the gear (transmission) is monitored, and if the gear is positioned at the P position (parking position), it is determined that the vehicle is not traveling, and the gear is in a position other than the P position (D position, N position, etc.) If it is positioned, it may be determined that the vehicle is traveling.

  In the above-described embodiment, the case where all the functions of the car navigation system 1 are disabled in the driver mode has been described. However, only a part of functions such as volume adjustment can be enabled.

  In the above-described embodiment, the car navigation system 1 has been described. However, the present invention can also be applied to in-vehicle devices other than the car navigation system 1 (for example, an in-vehicle television receiver).

  The present invention can be widely applied to various in-vehicle devices such as a car navigation system and an in-vehicle television receiver.

1 is a block diagram showing an embodiment of a car navigation system according to the present invention. It is a use condition figure of the car navigation system shown in FIG. It is a flowchart of a mode switching program. It is a top view showing the 1st example of seat arrangement of a car. It is a top view which shows the 2nd example of the vehicle seat arrangement. It is a top view which shows the 3rd example of the vehicle seat arrangement.

Explanation of symbols

1. Car navigation system (on-vehicle equipment)
2 …… Main body 3 …… Main microcomputer (running judgment means, stopping mode switching means, remote control transmission position detecting means, passenger mode switching means, driver mode switching means)
6 …… Vibration sensor 7 …… Memory 9 …… Main body light emitting part 10, 11 …… Main body light receiving part 15 …… Car microcomputer 16 …… Remote control 17 …… Microcomputer (remote control transmission position detection means)
18 …… Vehicle speed pulse sensor 20 …… Remote control light emitting part 21 …… Remote control light receiving part L3 …… Remote control transmission distance

Claims (14)

In an in-vehicle device that operates a device body mounted on a car with a remote control,
Remote control transmission position detecting means for determining whether or not the transmission position of the remote control is a driver's seat;
Passenger mode switching means for switching the device body to the passenger mode when the transmission position of the remote control is not the driver's seat;
An in-vehicle device, comprising: driver mode switching means for switching the device main body to a driver mode when the transmission position of the remote control is a driver's seat. In an in-vehicle device that operates a device body mounted on a car with a remote control,
Traveling determination means for determining whether or not the vehicle is traveling;
Stop mode switching means for switching the device body to a stop mode when the vehicle is not running,
Remote control transmission position detecting means for determining whether or not the transmission position of the remote control is a driver's seat;
Passenger mode switching means for switching the device body to the passenger mode when the transmission position of the remote control is not the driver's seat;
An in-vehicle device, comprising: driver mode switching means for switching the device main body to a driver mode when the transmission position of the remote control is a driver's seat. The remote control includes a remote control light emitting unit,
The device main body includes a pair of main body light receiving parts that are separated from each other in the horizontal direction,
The remote control transmission position detection means calculates the transmission direction of the remote control based on the arrival time difference of the control signals respectively input from the remote control light emitting unit to the main body light receiving units, and the remote control transmission position is determined from the transmission direction. It is determined whether it is a driver's seat, The vehicle equipment of Claim 1 or 2 characterized by the above-mentioned.   The in-vehicle device according to claim 3, wherein the main body light receiving unit is attached to both end portions in the horizontal direction of the device main body. The device body includes a body light emitting unit,
The remote control includes a remote control light receiving unit,
The remote control transmission position detection means calculates the transmission distance of the remote control based on the arrival time of the response signal input from the main body light emitting unit to the remote control light receiving unit in response to the control signal, and the remote control from the transmission distance The in-vehicle device according to claim 3, wherein it is determined whether or not the transmission position is a driver's seat.   The in-vehicle device according to any one of claims 1 to 5, wherein in the passenger mode, adjustment of volume and screen brightness of the device main body is restricted.   The in-vehicle device according to any one of claims 1 to 6, wherein in the driver mode, the operation of the remote controller is invalid and a warning is issued when the device main body receives an emergency broadcast. A method for switching the mode of an in-vehicle device that operates a device body mounted on a car with a remote control,
A remote control transmission position detection step for determining whether or not the transmission position of the remote control is a driver's seat;
Passenger mode switching step of switching the device main body to the passenger mode when the transmission position of the remote control is not the driver's seat;
And a driver mode switching step of switching the device main body to a driver mode when the transmission position of the remote control is a driver's seat. A method for switching the mode of an in-vehicle device that operates a device body mounted on a car with a remote control,
A travel determination step for determining whether or not the vehicle is traveling;
A stop mode switching step of switching the device body to a stop mode when the vehicle is not running;
A remote control transmission position detection step for determining whether or not the transmission position of the remote control is a driver's seat;
Passenger mode switching step of switching the device main body to the passenger mode when the transmission position of the remote control is not the driver's seat;
And a driver mode switching step of switching the device main body to a driver mode when the transmission position of the remote control is a driver's seat. The remote control includes a remote control light emitting unit,
The device main body includes a pair of main body light receiving parts that are separated from each other in the horizontal direction,
In the remote control transmission position detecting step, the remote control transmission direction is calculated based on the arrival time difference between the control signals input from the remote control light emitting unit to the main body light receiving units, and the remote control transmission position is calculated from the transmission direction. 10. The method for switching the mode of the in-vehicle device according to claim 8, wherein it is determined whether or not the vehicle is a driver seat.   The mode switching method of the in-vehicle device according to claim 10, wherein the main body light receiving unit is attached to both ends of the device main body in the horizontal direction. The device body includes a body light emitting unit,
The remote control includes a remote control light receiving unit,
In the remote control transmission position detecting step, the transmission distance of the remote control is calculated based on the arrival time of the response signal input from the main body light emitting unit to the remote control light receiving unit in response to the control signal, The method for switching modes of in-vehicle devices according to claim 10 or 11, wherein it is determined whether or not a transmission position of the remote control is a driver's seat.   The in-vehicle device mode switching method according to any one of claims 8 to 12, wherein, in the passenger mode, adjustment of volume and screen brightness of the device main body is restricted.   The in-vehicle device according to any one of claims 8 to 13, wherein in the driver mode, an operation of the remote controller is invalid and a warning is issued when the device main body receives an emergency broadcast. Mode switching method.

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