JP2012171474A - On-vehicle information display system, vehicle inside information display method, and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle information display system in which safety driving of a driver is ensured and then, excessive information output restriction is prevented.SOLUTION: An on-vehicle information display system 100 includes: a display unit 13 on which information is output by display; a fellow passenger presence/absence determination unit 14 for determining the presence/absence of fellow passengers; a driver condition determination unit 15 for determining whether or not the condition of a driver is a safety driving condition; and an output control unit 17 for restricting information to be displayed on the display unit 13 on the basis of a determination result in the fellow passenger presence/absence determination unit 14 and a determination result of the driver condition determination unit 15.

Description

  The present invention relates to an in-vehicle information display system that displays information in a vehicle, and more particularly, to an in-vehicle information display system that enables viewing of a television, reproduction of media such as a DVD, and the like.

  In recent years, information display systems capable of viewing television in a vehicle and reproducing media such as DVDs have become widespread, and information display systems having a function of browsing web contents have also been proposed. Thus, a stationary information display system that is stationary in the vehicle for the purpose of use in the vehicle or a portable information display system that uses a portable terminal that can be used in the vehicle or outside the vehicle ( Hereinafter, when both are collectively referred to as “vehicle-mounted information display system”), it is necessary to consider that the driver's gaze at the displayed video does not affect safe driving.

  For this reason, in the conventional in-vehicle information display system, video output control is performed according to the vehicle state so as not to affect safe driving. For example, in a conventional stationary in-vehicle information display system, video is output when the vehicle is stopped, and control is performed so that video is not output or is stopped while traveling (for example, patents) Reference 1).

  In addition, as another conventional stationary on-board information display system, the video update cycle is changed according to the vehicle speed (Patent Document 2), while the video output is stopped during traveling and the vehicle is stopped. In this case, the replay part is output as a digest (Patent Document 3), the video is stopped during driving and only the audio is output (Patent Document 4), and the video output is stopped during driving In addition, when the vehicle stops, it is output from the continuation (Patent Document 5). While driving, the video is stopped and only the audio is output, and when the switch is pressed, the video at that time is recorded. (Patent Document 6) that can be reproduced later.

  Also, in a portable in-vehicle information display system, depending on the entrance state of a mobile terminal to a specific facility (for example, a station, an airport, a parking lot, etc.) or the movement state of a user (stationary, walking, bus movement, etc.) Permits or restricts the output of video depending on what is controlled to stop or restart video output (Patent Document 7) and whether the vehicle is stopped or traveling. There exists what was made to do (patent document 1).

JP 2004-180201 A JP 2008-042443 A JP 2007-027834 A JP 2005-286816 A JP 2004-122888 A JP 2002-094933 A JP 2009-284255 A

  However, since all of the conventional in-vehicle information display systems perform video output control according to the state of the vehicle, it is possible to avoid the driver's attention being directed to the in-vehicle information display system and affect safe driving. Even so, not only the driver but also the passengers of the vehicle could not see the video. In addition, since all conventional in-vehicle information display systems are uniformly limited in video output according to the state of the vehicle, the video output may be excessively limited beyond the need to ensure safe driving. .

  The present invention has been made in view of the above-described problems, and an object thereof is to provide an in-vehicle information display system that does not restrict excessive information output after ensuring safe driving of a driver.

  In order to solve the above conventional problems, an in-vehicle information display system according to the present invention includes a display unit that outputs information by display, and a viewer determination unit that determines whether the viewer is a driver or a passenger. And an output control unit that restricts information output from the display unit based on a determination result of the viewer determination unit. With this configuration, the information output on the display unit is restricted based on the determination of whether the viewer is a driver or a passenger, so excessive information output restrictions are made after ensuring safe driving of the driver. It is possible to limit the information output on the display unit so that it does not occur.

  In the above-described in-vehicle information display system, the display unit may be installed in a vehicle, and the viewer determination unit determines that the viewer is a passenger when there is a passenger, and there is no passenger. In this case, it may be determined that the viewer is a driver. With this configuration, it is possible to determine whether the viewer is a driver or a passenger based on the presence or absence of a passenger.

  In the above-described in-vehicle information display system, the display unit may be provided in a mobile terminal, and the viewer determination unit determines that the viewer is a driver when the mobile terminal is used by a driver. And when the said portable terminal is used by the passenger, you may judge that a viewer is a passenger. With this configuration, it is possible to determine whether the viewer is a driver or a passenger based on whether the portable terminal is used by a driver or a passenger.

  In the above-described in-vehicle information display system, the output control unit may limit information output from the display unit when the viewer determination unit determines that the viewer is a driver. With this configuration, it is possible to prevent the driver's safe driving from being affected by the output of information.

  In the above-described in-vehicle information display system, the output control unit does not limit information output on the display unit when the viewer determination unit determines that the viewer is a passenger. It's okay. With this configuration, it is prevented that not only the driver but also the passenger cannot see the information due to the limitation of the information output.

  An in-vehicle information display system according to another aspect of the present invention includes a display unit that outputs information by display, a driver state determination unit that determines whether or not the driver is in a safe driving state, and the driver state determination unit. And an output control unit that restricts information output from the display unit based on the determination result. With this configuration, the information output on the display unit is limited based on whether or not the driver is in a safe driving state. Therefore, excessive information output is not restricted while ensuring safe driving of the driver. Thus, the information output on the display unit can be limited.

  In the in-vehicle information display system, the output control unit restricts information output from the display unit when the driver state determination unit determines that the driver state is not a safe driving state. Good. With this configuration, when the state of the driver is not the safe driving state, it is possible to prevent the driver from affecting the safe driving by outputting information on the display unit.

  In the above-described in-vehicle information display system, the output control unit does not limit information output from the display unit when the driver state determination unit determines that the driver state is a safe driving state. You may do it. With this configuration, it is possible to prevent the driver or the passenger from excessively restricting information output when the driver is in the safe driving state.

  The in-vehicle information display system according to still another aspect of the present invention includes a display unit that outputs information by display, a viewer determination unit that determines whether the viewer is a driver or a passenger, and a driver status. Based on the determination result of the driver determination unit that determines whether or not the vehicle is in a safe driving state, the determination result of the viewer determination unit, and the determination result of the driver state determination unit, the information output from the display unit is limited And an output control unit. With this configuration, the information output on the display unit is limited based on the determination whether the viewer is a driver or a passenger and whether the driver is in a safe driving state. The information output on the display unit can be restricted so as not to restrict the excessive information output after ensuring safe driving.

  In the above-described in-vehicle information display system, the output control unit does not limit the information output in the display unit when the viewer determination unit determines that the viewer is a passenger, When the viewer determining unit determines that the viewer is a driver, the driver state determining unit determines that the driver state is a safe driving state. The output information may not be restricted. With this configuration, when the viewer is a passenger, the passenger can see information, and even when the viewer is a driver, the driver is also in the safe driving state as long as the driver is in the safe driving state. Since the information can be viewed, the information output on the display unit can be restricted so as not to restrict the information output excessively.

  In the in-vehicle information display system, the output control unit restricts information output from the display unit when the viewer determination unit determines that the viewer is a driver, and the viewing control unit When the driver determination unit determines that the viewer is a passenger, the driver state determination unit determines that the driver state is not in a safe driving state. Information may be limited. With this configuration, when the viewer is a driver, output of information is restricted, and even when the viewer is determined to be a passenger, the driver is not in a safe driving state (for example, Since the output of information is also limited when the driver and the passenger stop the display unit), safe driving of the driver can be ensured.

  The in-vehicle information display method according to the present invention includes a viewer determining step for determining whether a viewer is a driver or a passenger, and a driver when the viewer is a driver in the viewer determining step. A driver state determination step for determining whether or not the vehicle is in a safe driving state, and when the viewer is determined to be a passenger in the viewer determination step and in the driver state determination step When the state is determined to be a safe driving state, a display step for outputting information by display, and when the driver state is determined not to be a safe driving state in the driver state determination step, the information is output. And a display restriction step for restricting the display. With this configuration, when the viewer is a driver and the driver is not in a safe driving state, the output of information is restricted, and when the viewer is a passenger and the driver is in a safe driving state Since the output of information is not limited, information can be output without restricting excessive information output while ensuring safe driving of the driver.

  Yet another aspect of the present invention is a computer program for causing a computer to execute the above-described in-vehicle information display method.

  ADVANTAGE OF THE INVENTION According to this invention, after ensuring the safe driving | operation of a driver, information can be output, without carrying out an excessive information output restriction | limiting.

The block diagram which shows the structure of the vehicle-mounted information display system of 1st Embodiment in embodiment of this invention. Operation flow diagram of the in-vehicle information display system of the first embodiment in the embodiment of the present invention The block diagram which shows the structure of the vehicle-mounted information display system of 2nd Embodiment in embodiment of this invention. The operation | movement flowchart of the vehicle-mounted information display system of 2nd Embodiment in embodiment of this invention

  Hereinafter, modes for carrying out the present invention will be described. As described above, in the present application, the “in-vehicle information display system” means not only a stationary information display system that is installed in a vehicle for the purpose of use in the vehicle, but also the use in the vehicle outside the vehicle. This includes a portable information display system using a portable terminal that can also be used. Hereinafter, embodiments will be specifically described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing a configuration of an in-vehicle information display system 100 according to the first embodiment of this invention. The in-vehicle information display system 100 according to the first embodiment is a stationary in-vehicle information display system. The in-vehicle information display system 100 includes an input unit 11, a reproduction unit 12, a display unit 13, a passenger presence determination unit 14, a driver state determination unit 15, a reproduction history storage unit 16, and an output control unit 17. I have.

  The input unit 11 has a function of inputting information to the in-vehicle information display system 100. For example, a TV receiver that receives TV radio waves, a media reader that reads video content stored on a DVD or smart media, a web from the Internet, and the like. It is a network interface that receives content. The in-vehicle information display system 100 may include all of a television receiver, a media reader, and a network interface as the input unit 11, or may include only a part thereof.

  The reproduction unit 12 has a function of reproducing information input by the input unit 11. For example, the reproduction unit 12 is a television tuner that reproduces a television image based on television radio waves received by a television receiver serving as the input unit 11, and the input unit 11. A DVD player for playing back video content read from the DVD drive, and an application for playing back web content received by the network interface as the input unit 11.

  The display unit 13 is a display that displays the video reproduced by the reproduction unit 12. The display unit 13 is installed in the vehicle. Specifically, the display unit 13 is installed at a position visible from the driver, for example, between a driver seat and a passenger seat on the dashboard of the vehicle. The display unit 13 further includes a speaker that outputs the sound reproduced by the reproduction unit 12, or is connected to a vehicle-mounted speaker. The display unit 13 may be a touch panel.

  The passenger presence / absence determination unit 14 determines the presence / absence of a passenger. In the present embodiment, the passenger presence / absence determination unit 14 particularly determines the presence / absence of a passenger in the passenger seat. The passenger presence determination unit 14 corresponds to the viewer determination unit of the present invention. The passenger presence / absence determination unit 14 is connected to a seating sensor provided in the passenger seat of the vehicle, and determines the presence / absence of a passenger in the passenger seat based on a detection signal from the seating sensor. The seating sensor outputs a detection signal indicating that a passenger is present when a weight load of a predetermined level or more is applied to the passenger seat.

  The fellow passenger presence / absence determination unit 14 may determine the presence / absence of a passenger by another method. For example, the passenger presence determination unit 14 is connected to a seat belt sensor provided in the passenger seat of the vehicle, and may determine whether there is a passenger in the passenger seat based on a detection signal from the seat belt sensor. . The seat belt sensor outputs a detection signal indicating that a passenger is present when the passenger seat is used.

  Further, a door sensor on the passenger side of the vehicle is connected to the passenger presence / absence determination unit 14, and the presence / absence of a passenger in the passenger seat may be determined based on a detection signal from the door sensor. The door sensor outputs a detection signal indicating that there is a passenger when there is an opening or closing operation of the door on the passenger seat side.

  Further, a camera for photographing the passenger seat is connected to the passenger presence / absence determination unit 14, and the passenger presence / absence determination unit 14 may determine the presence / absence of a passenger in the passenger seat based on a photographed image of the camera. . In this case, the passenger presence / absence determination unit 14 performs image recognition processing on the captured image to determine the presence / absence of a person (that is, a passenger in the passenger seat).

  The passenger presence / absence determination unit 14 is connected to an infrared sensor that irradiates the passenger's seat with infrared rays from the vicinity of the display unit 13 and receives reflected infrared rays. When detected by the sensor, it may be determined that there is a passenger in the passenger seat. When there is a passenger in the passenger seat and looking at the display unit 13, since the irradiated infrared ray hits the cornea of the fundus of the passenger and is reflected as it is, the infrared ray is received by the infrared sensor. Therefore, the presence or absence of a passenger can be determined based on the presence or absence of reflected infrared light.

  Furthermore, when the direction of the display as the display unit 13 can be adjusted, the passenger determination unit 14 may determine whether there is a passenger in the passenger seat based on the direction. In this case, the passenger determination unit 14 determines that there is a passenger in the passenger seat when the display is directed toward the passenger seat.

  The driver state determination unit 15 determines the state of the driver, that is, the person seated in the driver's seat. The driver state determination unit 15 determines the driving safety level as the driver state based on the driver's line of sight. For this purpose, the vehicle is provided with a camera for photographing the driver, and the driver state determination unit 15 receives an image of the driver photographed by the camera (driver image).

  The driver state determination unit 15 performs image recognition processing on the driver image and recognizes the direction of the driver's face. The driver state determination unit 15 determines the safety level of driving based on the ratio between the time when the driver is facing forward and the other time. The driver state determination unit 15 determines that the safety degree of driving is higher as the ratio of the time during which the driver is facing forward is larger. The driver state determination unit 15 outputs the determination result to the output control unit 17 when the driving safety level is lower than a predetermined threshold.

  The driver state determination unit 15 may determine the degree of driving safety by recognizing the opening degree of the driver's eyelid from the driver image. When the eyelid opening degree is small, the driver state determination unit 15 determines that the driver is drowsy and the driving safety level is low. Further, the driver state determination unit 15 determines whether or not the driver is gazing at the display unit 13 based on the driver image, and determines the driving safety level according to the time during which the driver is gazing at the display unit 13. You can judge. The driver state determination unit 15 determines that the safety degree of driving is lower as the time during which the driver is gazing at the display unit 13 is longer.

  In the above example, the driver state determination unit 15 determines the driving safety level based on the driver image from the camera that captures the driver, but the method for determining the driving safety level is not limited thereto. For example, the driver state determination unit 15 may determine the driving safety level based on an image outside the vehicle by a camera that captures the outside of the vehicle. In this case, it is possible to perform image recognition processing on the image outside the vehicle, recognize the white line, and determine the driving safety level based on the behavior of the vehicle with respect to the white line. That is, the driver state determination unit 15 determines that the driving safety level is low when the vehicle meanders with respect to the white line.

  In the above example, the driver state determination unit 15 determines the driving safety degree as the driver state, but the driver state is not limited to the driving safety degree. For example, the driver state may be whether the video to be displayed is a video that has been displayed in the past. Further, the driver state determination unit 15 may determine the driver state by pressing a button by the driver or inputting a voice of the driver.

  The playback history storage unit 16 stores the history of the video played back by the playback unit 12. For example, in the case of DVD playback, information on which chapters have been played in the past for the DVD is stored. When a television program is recorded, the recorded portion is recorded in the reproduction history storage unit 16 as having been reproduced at the same time as the television image is displayed. Further, when a television program is recorded at home, stored in a recording medium and reproduced by the in-vehicle information display system 100, reproduction history information indicating whether or not the television program has been reproduced is stored in the recording medium. It may be left. In this case, the playback history storage unit 16 stores the playback history of the television program stored on the recording medium based on the playback history information.

  The output control unit 17 controls reproduction by the reproduction unit 12 based on the determination result in the passenger presence determination unit 14 and the determination result in the driver state determination unit 15. The output control unit 17 controls reproduction by the reproduction unit 12 based on the reproduction history stored in the reproduction history storage unit 16 as necessary.

  When the passenger presence / absence determination unit 14 determines that there is a passenger in the passenger seat, the output control unit 17 does not limit the reproduction by the reproduction unit 12 and displays the reproduced video as it is. To display. As a result, the passenger can view the video.

  The output control unit 17 does not restrict the reproduction by the reproduction unit 12 in principle when the passenger presence / absence determination unit 14 determines that there is a passenger in the passenger seat, but the passenger in the passenger seat does not limit the reproduction. Even when it is determined that there is a vehicle, when the driver state determination unit 15 inputs a determination result indicating that the safety level of driving is lower than a predetermined threshold (for example, when a passenger is present in the passenger seat and sees the video) However, if the driver is watching this video at the same time, this may be the case.) Playback of the video by the playback unit 12 may be stopped. In this case, the display unit 13 stops the video or stops displaying the video itself.

  Thus, the passenger can see the video and can thereby avoid affecting the driver's safe driving. In addition, since the video reproduction is stopped when the driver's driving safety level is low, the passenger can recognize that the driver's driving safety level is low, and can call the driver's attention.

  When the passenger presence / absence determination unit 14 determines that there is no passenger in the passenger seat, the output control unit 17 performs reproduction by the reproduction unit 12 based on the driver state input from the driver state determination unit 15. Restrict. The output control unit 17 stops the reproduction of the video by the reproduction unit 12 when the driver state determination unit 15 receives a determination result that the safety level of driving is lower than a predetermined threshold. At this time, the display unit 13 stops the video or stops displaying the video.

  The output control unit 17 refers to the reproduction history storage unit 16 when the passenger presence / absence determination unit 14 determines that there is no passenger in the passenger seat. The playback by the playback unit 12 may be stopped and the playback unit 12 may play back the video that has already been played back regardless of the safety level of the driver's driving. This is because the driver tends to watch the video that has not been viewed yet and affects safe driving, but it is considered that the driver is less likely to watch the video that has already been played.

  Further, when the passenger presence / absence determination unit 14 determines that there is no passenger in the passenger seat, the output control unit 17 stops the reproduction by the reproduction unit 12 and, as a rule, presses a button or voice by the driver. When there is an input such as an input, reproduction by the reproduction unit 12 may be performed. Also in this case, the output control unit 17 may perform the reproduction by the reproduction unit 12 on the condition that the determination result that the driving safety level is below the threshold is not input from the driver state determination unit 15. .

  Further, the driver state determination unit 15 outputs a determination result as to whether or not the driver is viewing the display unit 13 to the output control unit 17, and the output control unit 17 uses the passenger presence / absence determination unit 14 to detect the passenger seat. When it is determined that there is no passenger, information on whether or not the driver is viewing the display unit 13 is input from the driver state determination unit 15, and only when the driver is viewing the display unit 13, the playback unit The reproduction by the reproduction unit 12 may be stopped when the driver does not look at the display unit 13. Also in this case, the output control unit 17 may perform the reproduction by the reproduction unit 12 on the condition that the determination result that the driving safety level is below the threshold is not input from the driver state determination unit 15. .

  As described above, the driver state determination unit 15 may determine whether or not the driver is viewing the display unit 13 by performing image recognition processing on the driver image and recognizing the direction of the driver's face. Alternatively, the driver state determination unit 15 is connected to an infrared sensor that irradiates the driver's seat with infrared rays from the vicinity of the display unit 13 and receives reflected infrared rays, and the driver state determination unit 15 transmits the reflected infrared rays to the driver state determination unit 15. By detecting with an infrared sensor, it may be determined whether the driver is viewing the display unit 13 or not.

  The operation of the in-vehicle information display system 100 configured as described above will be described. FIG. 2 is a flowchart showing an example of processing of the in-vehicle information display system 100. The in-vehicle information display system 100 starts processing when an instruction to display a video is given by the user (such as an instruction to start watching TV or an instruction to start DVD playback). The in-vehicle information display system 100 first determines the presence / absence of a passenger in the passenger seat at the passenger presence / absence determination unit 14 (step S21).

  Passenger presence / absence determination unit 14 outputs the determination result to output control unit 17, and output control unit 17 is instructed to reproduction unit 12 when there is a passenger in the passenger seat (YES in step S21). The video is played back, and the display unit 13 displays the video (step S22). If there is no passenger in the passenger seat (NO in step S21), the driver state determination unit 15 determines the driving safety level of the driver, and if the safety level is below a predetermined threshold, The determination result is output to the output control unit 17, and the output control unit 17 determines whether or not the driver is performing safe driving according to the determination result (step S23).

  In the case of safe driving (when the determination result that the degree of safety is below the predetermined threshold is not received from the driver state determination unit 15) (YES in step S23), the output control unit 17 is the regeneration unit 12. If the driver does not perform safe driving (when the determination result that the safety level is lower than the predetermined threshold value is received from the driver state determining unit 15) (NO in step S23), the reproducing unit 12 The display unit 13 stops the video or the video display (step S24).

  The in-vehicle information display system 100 has the above steps S21 to S21 until the instruction to display the video by the user is canceled or the power of the in-vehicle information display system 100 is turned off (including the case where the vehicle engine is stopped). Repeat S24. If it is determined in step S21 that there is no passenger in the passenger seat, the determination of the presence or absence of a passenger may be omitted thereafter. In this case, it is rare that a passenger is added after an instruction to display a video is once issued by the user until the instruction is canceled or the power of the in-vehicle information display system 100 is turned off. Because it is considered.

  As described above, according to the in-vehicle information display system 100 of the present embodiment, when a passenger is present, the reproduction of the image is not stopped, so that the passenger can also view the image to ensure the safety of the driver. You can't get lost. In addition, if there is a possibility that the driver's condition may affect safe driving even if there are passengers, video playback can be prevented from affecting safe driving if the video playback is stopped. it can. On the other hand, even when there are no passengers, as long as the driver is driving safely, the video is reproduced, so that it is possible to prevent excessive reproduction restrictions on the video while the vehicle is running.

(Second Embodiment)
FIG. 3 is a block diagram showing a configuration of the in-vehicle information display system 200 according to the second embodiment of this invention. The in-vehicle information display system 200 according to the second embodiment is a portable in-vehicle information display system. The portable type does not mean that the entire in-vehicle information display system is portable, but means that at least a part of the configuration including the display unit can be carried independently from the vehicle.

  In FIG. 3, in the in-vehicle information display system 200 according to the second embodiment, the same components as those in the in-vehicle information display system 100 according to the first embodiment are denoted by the same reference numerals. The in-vehicle information display system 200 includes an in-vehicle device 201 and a mobile terminal 202. The in-vehicle device 201 includes a viewer determination unit 18, a driver state determination unit 15, a reproduction history storage unit 16, and an output control unit 17, and the mobile terminal 202 includes an input unit 11, a reproduction unit 12, and the like. And a display unit 13.

  The mobile terminal user determination unit 18 has a configuration corresponding to the passenger presence determination unit 14 of the first embodiment, and corresponds to the viewer determination unit of the present invention. The mobile terminal user determination unit 18 determines whether the mobile terminal 202 is being used by a driver or another passenger. A driver's seat cradle sensor provided in a cradle on the driver's seat side for holding the portable terminal 202 is connected to the portable terminal user determining unit 18. The driver's seat cradle sensor outputs a signal indicating whether or not the portable terminal 202 is held in the cradle on the driver's seat side to the portable terminal user determination unit 14.

  The vehicle is provided with a camera that captures the driver. The driver image captured by the camera is input to the mobile terminal user determination unit 18, and the mobile terminal user determination unit 18 outputs the driver image to the driver image. Alternatively, an image recognition process may be performed to determine whether or not the mobile terminal 202 is being used by a driver.

  In addition, a contact sensor that detects the contact of both the left and right hands is provided in the steering of the vehicle, a signal from the steering sensor is input to the mobile terminal user determination unit 18, and the mobile terminal 202 is connected to the mobile terminal 202. May be measured, and the measured acceleration may be input to the mobile terminal user determination unit 18 by wireless communication. In this case, the mobile terminal user determination unit 18 determines that the steering is held with one hand based on the signal from the steering sensor, and the acceleration change of the mobile terminal 202 is the acceleration change of the vehicle. When different, it is determined that the portable terminal 202 is being used by the driver.

  In addition, the mobile terminal user determination unit 18 inputs the acceleration of the mobile terminal 202, obtains the orientation of the mobile terminal 202 based on the acceleration, and when the mobile terminal 202 faces the driver, It may be determined that the terminal 202 is being used by the driver and that the mobile terminal 202 is not being used by the driver when facing the direction other than the driver.

  In addition, the steering and the portable terminal 202 can communicate with each other, and a signal from the portable terminal 202 is input to the portable terminal user determination unit 18 via the driver's human body and steering, so that the portable terminal user determination unit 18 may determine that the mobile terminal 202 is being used by a driver.

  In the above description, the mobile terminal user determination unit 18 determines whether or not the driver is using the mobile terminal 202. However, the mobile terminal user determination unit 18 can use any one of the above methods or a similar method. Thus, it may be determined whether the passenger in the passenger seat is using the mobile terminal 202.

  When the mobile terminal 202 is used by the driver, the output control unit 17 restricts playback by the playback unit 12 in the same manner as in the case where there is no passenger in the first embodiment. When not being used, the playback by the playback unit 12 is restricted in the same manner as in the case where there is a passenger in the first embodiment.

  The operation of the in-vehicle information display system 200 configured as described above will be described. FIG. 4 is a flowchart showing an example of processing of the in-vehicle information display system 200. The in-vehicle information display system 200 starts processing when the portable terminal 202 is brought into the vehicle and an instruction to display an image is given by the user. The in-vehicle information display system 200 may recognize that the mobile terminal 202 has been brought into the vehicle, for example, through communication between the in-vehicle device 201 and the mobile terminal 201.

  In-vehicle information display system 200 first determines whether or not the viewer is a driver at viewer determination unit 18 (step S41). The viewer determination unit 18 outputs the determination result to the output control unit 17, and the output control unit 17 instructs the playback unit 12 when the user of the mobile terminal 202 is not a driver (NO in step S41). The displayed image is reproduced, and the display unit 13 displays the image (step S42). If the user of portable terminal 202 is a driver (YES in step S41), driver state determination unit 15 determines the driver's driving safety level, and the safety level is below a predetermined threshold. Outputs a determination result to that effect to the output control unit 17, and the output control unit 17 determines whether or not the driver is driving safely according to the determination result (step S43).

  In the case of safe driving (when the determination result that the degree of safety is below the predetermined threshold value is not received from the driver state determination unit 15) (YES in step S43), the output control unit 17 is the regeneration unit 12. If the instructed video is played back and the driving is not safe (when the determination result that the safety level is below the predetermined threshold is received from the driver state determination unit 15) (NO in step S43), The playback unit 12 stops the playback, and the display unit 13 stops the video or stops displaying the video (step S44).

  The in-vehicle information display system 200 has the above steps S41 to S41 until the instruction to display the video by the user is canceled or the power of the in-vehicle information display system 200 is turned off (including the case where the vehicle engine is stopped). S44 is repeated.

  As described above, according to the in-vehicle information display system 200 of the present embodiment, when the mobile terminal 202 is used by the driver, the video playback is stopped, but the mobile terminal 202 is a person other than the driver ( In the case of being used by a passenger), since the reproduction of the video is not stopped, the video cannot be viewed on the display unit 13 of the portable terminal 202 even for the passenger to ensure the safety of the driver. Further, even when the mobile terminal 202 is used by a driver, when the driver state is in a state where there is no possibility of affecting safe driving, if the video playback is not stopped, the vehicle is running. It is possible to prevent excessive output limitation of the video.

  In the first embodiment, the in-vehicle information display system 100 includes the passenger presence / absence determination unit 14 as the viewer determination unit and the driver state determination unit 15, and the output control unit 17 Based on the determination result of the presence / absence determination unit 14 and the determination result of the driver state determination unit 15, the reproduction by the reproduction unit 12 is controlled. In the second embodiment, the in-vehicle information display system 200 includes the viewer determination unit. Mobile terminal user determination unit 18 and driver state determination unit 15, and output control unit 17 reproduces based on the determination result of mobile terminal user determination unit 18 and the determination result of driver state determination unit 15. Although the reproduction by the unit 12 is controlled, the in-vehicle information display system 100 includes either one of the passenger presence determination unit 14 and the driver state determination unit 15, and the output control unit 17 determines whether the passenger is present. The reproduction by the reproduction unit 12 may be controlled based on either the determination result of the unit 14 or the determination result of the driver state determination unit 15, and the display information display system 200 includes the mobile terminal user determination unit 18 and the driver state. One of the determination units 15 is provided, and the output control unit 17 controls reproduction by the reproduction unit 12 based on either the determination result of the mobile terminal user determination unit 18 or the determination result of the driver state determination unit 15. May be.

  For example, in the first embodiment, when the in-vehicle information display system 100 includes the passenger presence / absence determination unit 14 and the output control unit 17 determines that there is a passenger regardless of the state of the driver. The reproduction by the reproduction unit 12 may be restricted when it is determined that there is no passenger without restricting the reproduction by the reproduction unit 12. In the first embodiment, the in-vehicle information display system 100 includes the driver state determination unit 15, and the output control unit 17 determines that the driver state is the safe driving state regardless of the presence or absence of a passenger. In such a case, the regeneration by the regeneration unit 12 may be restricted when the regeneration by the regeneration unit 12 is not restricted and it is determined that the vehicle is not in the safe driving state.

  Similarly, in the second embodiment, the in-vehicle information display system 200 includes the mobile terminal user determination unit 18, and the output control unit 17 uses the mobile terminal by the driver regardless of the driver state. If it is determined that the mobile terminal is being used by the passenger, the playback by the playback unit 12 may not be limited. Moreover, in 2nd Embodiment, the vehicle-mounted information display system 200 is provided with the driver state judgment part 15, and the output control part 17 is in a safe driving state regardless of who is using the portable terminal. If it is determined that the regeneration unit 12 does not limit the regeneration, the regeneration unit 12 may restrict the regeneration when it is determined that the vehicle is not in the safe driving state.

  In the above-described embodiment, the output control unit 17 controls the playback unit 12 to cause the playback unit 12 to perform playback or stop playback. Instead of stopping the playback, the playback unit 12 may play back the video at a lower update frequency. Further, for example, the output control unit 17 may stop the reproduction or reduce the update frequency of the video according to the safety level of the operation received from the driver state determination unit 15. In this case, the output control unit 17 causes the playback unit 12 to stop playback when the safety level is considerably low, and when the safety level is not so low, the playback control unit 17 reduces the update frequency to perform playback. You may let me. Such stoppage of reproduction and a decrease in the update frequency of video correspond to restrictions on information output (displayed) on the display unit 13.

  The operation of the in-vehicle information display system described above corresponds to the in-vehicle information display method of the present invention, and the operation flow may be realized by executing a computer program by a computer.

  In addition, the in-vehicle information display system 100 and the in-vehicle information display system 200 according to the first and second embodiments may perform output control according to the content to be reproduced, in addition to the configuration and processing described above. For example, when watching TV, the CM may be reproduced.

  Further, the in-vehicle information display system 100 according to the first embodiment includes two display units 13 (one in the center of the dashboard and the other in the instrument panel) in addition to the above configuration and processing. While driving, the video may be displayed on a display unit in the center of the dashboard, and when stopped, the video may be displayed on a display unit as an instrument panel meter screen.

  As described above, the present invention has an effect that information can be output without excessively restricting information output while ensuring safe driving of the driver, and the information is displayed in the vehicle. It is useful as an information display system.

DESCRIPTION OF SYMBOLS 11 Input part 12 Reproduction | regeneration part 13 Display part 14 Passenger presence / absence judgment part 15 Driver state judgment part 16 Playback history preservation | save part 17 Output control part 18 Portable terminal user judgment part 100 Car-mounted information display system (stationary type)
200 In-vehicle information display system (portable)
201 in-vehicle device 202 portable terminal

Claims (13)

A display unit for outputting information by display;
A viewer determination unit that determines whether the viewer is a driver or a passenger,
An in-vehicle information display system comprising: an output control unit that restricts information output from the display unit based on a determination result of the viewer determination unit. The display is stationary on the vehicle;
The viewer determination unit determines that the viewer is a passenger when the passenger is present, and determines that the viewer is a driver when the passenger is not present. The in-vehicle information display system described. The display unit is provided in a mobile terminal,
The viewer determination unit determines that the viewer is a driver when the mobile terminal is used by a driver, and the viewer is a passenger when the mobile terminal is used by a passenger. The in-vehicle information display system according to claim 1, wherein the on-vehicle information display system is determined.   The output control unit restricts information output from the display unit when the viewer determination unit determines that the viewer is a driver. The in-vehicle information display system according to any one of the above.   5. The output control unit does not limit information output from the display unit when the viewer determination unit determines that the viewer is a passenger. The in-vehicle information display system according to any one of the above. A display unit for outputting information by display;
A driver state determination unit that determines whether or not the driver state is a safe driving state;
An in-vehicle information display system comprising: an output control unit that restricts information output from the display unit based on a determination result of the driver state determination unit.   The output control unit restricts information output from the display unit when the driver state determination unit determines that the driver state is not a safe driving state. The in-vehicle information display system described.   The output control unit does not limit information output from the display unit when the driver state determination unit determines that the driver state is a safe driving state. Or the in-vehicle information display system according to 7. A display unit for outputting information by display;
A viewer determination unit that determines whether the viewer is a driver or a passenger,
A driver state determination unit that determines whether or not the driver state is a safe driving state;
An in-vehicle information display system comprising: an output control unit that restricts information output from the display unit based on a determination result of the viewer determination unit and a determination result of the driver state determination unit.   The output control unit does not limit information output on the display unit when the viewer determination unit determines that the viewer is a passenger, and the viewer determination unit When the viewer is determined to be a driver, when the driver state determination unit determines that the driver state is a safe driving state, the information output from the display unit is not limited. The in-vehicle information display system according to claim 9.   The output control unit restricts information output from the display unit when the viewer determining unit determines that the viewer is a driver, and the viewer determining unit When the driver state determination unit determines that the driver state is not a safe driving state, the information output on the display unit is limited. The in-vehicle information display system according to claim 9 or 10, characterized in that A viewer determination step for determining whether the viewer is a driver or a passenger,
A driver state determination step for determining whether the driver is in a safe driving state when the viewer is a driver in the viewer determination step;
Information is output by display when the viewer is determined to be a passenger in the viewer determination step and when the driver state is determined to be a safe driving state in the driver state determination step. A display step;
When it is determined that the driver state is not a safe driving state in the driver state determining step, a display limiting step for limiting output of the information;
In-vehicle information display method comprising:   A computer program for causing a computer to execute the in-vehicle information display method according to claim 12.

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