JP4892754B2 - Mobile device control method and mobile device - Google Patents

Description

  The present invention relates to a portable device control method for controlling the luminance of display of a portable device brought into a vehicle, and a portable device that performs appropriate luminance control when brought into a vehicle.

  Mobile devices such as portable game machines, mobile phones, and portable personal computers may be used by passengers in cars such as automobiles. When a passenger uses such a portable device in a car traveling at night, the light emitted from the backlight of the display screen is reflected on the windshield of the vehicle, causing discomfort to the driver and driving. May be distracting.

  In Patent Literature 1 and Patent Literature 2, the brightness of the screen of the display device mounted on the automobile is determined based on whether or not the headlamp is turned on and the measurement result of the illuminance sensor that measures the illuminance around the automobile. A mechanism for controlling is described.

  Patent Document 3 describes a display device that controls the luminance of a display screen based on the measurement result of an illuminance sensor that measures the illuminance around the display screen.

Japanese Utility Model Publication No. 6-59889 (paragraphs 0007 to 0011, FIG. 1) Japanese Patent Laid-Open No. 7-154719 (paragraphs 0014 to 0025, FIG. 1) JP-A-5-173529 (paragraphs 0009 to 0014, FIG. 1)

  In the methods described in Patent Document 1 and Patent Document 2, a display device that controls the brightness of a screen is mounted on a vehicle (a display device for a car navigation system, an in-vehicle television receiver, a speed display). Device). That is, the brightness of the display screen of a portable device that is brought into the vehicle and used cannot be controlled. Therefore, when the portable device is used in a running vehicle while keeping the driver's attention from being distracted, the user must manually change the brightness, which is troublesome.

  In the display device described in Patent Document 3, since each mobile device needs to include an illuminance sensor, the cost of each mobile device increases. Also, the brightness cannot be set differently when the illuminance around the display device is the same between when used inside a running vehicle and when used outside the vehicle. Furthermore, when it is set by the user not to use the brightness control function, the user must manually change the brightness, which is troublesome.

  Accordingly, the present invention provides a portable device control method and a display device that controls a portable device that can prevent a portable device brought into the vehicle from interfering with the driving of the driver without the user performing brightness adjustment. The purpose is to provide.

  A portable device control method according to the present invention is a portable device control method for controlling the display brightness of a portable device brought into a vehicle in which illuminance measuring means for measuring ambient illuminance is installed, and is installed in the vehicle. The transmitting means transmits a signal that can reach a predetermined range in the vehicle, and the portable device that has received the signal transmitted from the vehicle transmits a reception status signal that is a signal in response to the signal. When the reception status signal is received, the control unit in the vehicle determines that the portable device is brought into the vehicle, and when the portable device is determined to be brought into the vehicle, the vehicle measures the illuminance. Based on the illuminance measured by the means, the instruction information indicating the brightness of the display means in the portable device is generated and transmitted, and the portable device displays on the portable device based on the instruction information received from the vehicle. And controlling the brightness.

  The portable device according to the present invention is capable of controlling the luminance of the display when the illuminance measuring means for measuring the illuminance of the surroundings is installed in the vehicle that transmits a signal that can reach a predetermined range in the vehicle. When it is a portable device and can receive a signal transmitted from a vehicle, a reception status signal transmitting means for transmitting a reception status signal that is a signal in response to the signal, and a vehicle that has received the reception status signal measure illuminance Information that is created and transmitted based on the illuminance measured by the means and that receives instruction information indicating the brightness of the display means in the portable device, and brightness of the display means based on the instruction information received from the vehicle And control means for controlling.

  ADVANTAGE OF THE INVENTION According to this invention, when a portable apparatus is brought in into a vehicle, it can prevent that a portable apparatus obstructs a driver | operator's driving | operation.

It is a conceptual diagram which shows the outline | summary of embodiment of this invention. It is explanatory drawing which shows the structural example of the apparatus mounted in a vehicle. It is explanatory drawing which shows the structural example of the apparatus mounted in a portable apparatus. It is explanatory drawing which shows the relationship between each apparatus mounted in the vehicle, and each apparatus mounted in the portable apparatus. It is a sequence diagram which shows operation | movement of embodiment of this invention. It is explanatory drawing which shows the example of the reach | attainment range of the signal transmitted via each transmission antenna. It is explanatory drawing which shows the case where the some portable apparatus (a portable apparatus and a portable game machine) is used in the vehicle. It is explanatory drawing which shows the case where the control part of a vehicle and the control part of a portable apparatus transmit / receive information based on Bluetooth specification. It is a flowchart which shows the outline | summary of this invention.

  An outline of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram showing an outline of an embodiment of the present invention.

  In the example shown in FIG. 1, the vehicle 20 has a driver seat 31a and a passenger seat 31b installed in the first row from the front, a rear seat 31c and a rear seat 31d installed in the second row, and the third row. A rear seat 31e and a rear seat 31f are installed.

  A transmission antenna 1a is installed near the driver's seat 31a in the vehicle 20, and a transmission antenna 1b is installed near the passenger seat 31b. A transmission antenna 1c is installed in the vicinity of the rear seat 31c, and a transmission antenna 1d is installed in the vicinity of the rear seat 31d. A transmission antenna 1e is installed in the vicinity of the rear seat 31e, and a transmission antenna 1f is installed in the vicinity of the rear seat 31f. The transmission antennas 1a to 1f are antennas for transmitting a predetermined signal that can reach a predetermined range. The predetermined signal is, for example, a signal that can identify the own transmission antenna (hereinafter, referred to as a position detection signal). The range in which the position detection signal can be reached is slightly wider than the range inside the vehicle. Further, the position detection signals transmitted from the respective transmission antennas 1a to 1f are signals that can be distinguished from signals transmitted from other places (installation positions of other antennas).

  Further, the vehicle 20 is a receiving antenna 2 for receiving a signal (a reception result signal described later) based on predetermined information (a reception result information described later), and a communication antenna based on the Bluetooth (registered trademark) standard. A Bluetooth antenna 4 and an illuminance sensor 3 for measuring the illuminance around the vehicle 20 are installed. Furthermore, headlamps 5 a and 5 b are installed in the vehicle 20.

  The portable device 21 receives the reception antenna 18 for receiving the position detection signals transmitted by the transmission antennas 1a to 1f, and the reception based on the reception result information corresponding to the position detection signals received via the reception antenna 18. A transmission antenna 19 for transmitting the result signal and a Bluetooth antenna 17 which is an antenna for Bluetooth communication are installed. The reception result signal is received via the receiving antenna 2 installed in the vehicle 20. The reception result information will be described later.

  In the example illustrated in FIG. 1, the Bluetooth antenna 17, the reception antenna 18, and the transmission antenna 19 are installed outside the mobile device 21, but these antennas may be built in the mobile device 21.

  FIG. 2 is an explanatory diagram illustrating a configuration example of a device mounted on the vehicle 20. As shown in FIG. 2, the vehicle 20 includes a control unit 8, a reception unit 9, and a transmission unit 10 in addition to the configuration shown in FIG. 1. The control unit 8 is connected to headlamps 5 a and 5 b, a display device (hereinafter referred to as a car navigation device) 6 and an instrument panel instrument 7 of a car navigation system. Note that description of the transmission antennas 1a to 1f, the reception antenna 2, the illuminance sensor 3, and the Bluetooth antenna 4 included in the configuration shown in FIG. 1 is omitted.

  The control unit 8 controls the brightness of the headlamps 5 a and 5 b, the car navigation device 6, and the instrument panel instrument 7 based on the illuminance around the vehicle 20 measured by the illuminance sensor 3. Further, the control unit 8 instructs the transmission unit 10 to transmit position detection signals via the transmission antennas 1a to 1f. The transmission unit 10 transmits different position detection signals via the transmission antennas 1a to 1f in response to the instruction.

  The receiving unit 9 receives the reception result signal transmitted via the transmission antenna 19 mounted on the portable device 21 via the reception antenna 2. Based on the reception result signal received by the receiving unit 9, the control unit 8 determines whether or not the portable device 21 is in the vehicle 20 (hereinafter simply referred to as the vehicle). Note that the control unit 8 determines that the portable device 21 is not in the vehicle when the reception unit 9 does not receive the reception result signal.

  When the control unit 8 determines that the portable device 21 is in the vehicle, the control unit 8 determines the luminance value based on the illuminance measured by the illuminance sensor 3. Then, the control unit 8 transmits instruction information indicating that the mobile device 21 is in the vehicle and the determined luminance value to the mobile device 21 via the Bluetooth antenna 4. The luminance value is a value for setting the brightness of the display screen of the mobile device 21. That is, the control unit 8 determines the brightness of the display screen of the mobile device 21 when the mobile device 21 is in the vehicle.

  FIG. 3 is an explanatory diagram illustrating a configuration example of a device mounted on the mobile device 21. As illustrated in FIG. 3, the portable device 21 includes a backlight control unit 13, a control unit 14, a reception unit 15, and a transmission unit 16 in addition to the configuration illustrated in FIG. 1. The backlight controller 13 is connected to an LCD backlight 12 installed in an LCD (Liquid Crystal Display) 11. The luminance of the LCD backlight 12 is controlled by the backlight control unit 13 by, for example, a PWM (Pulse Width Modulation) method.

  The receiving unit 15 receives the position detection signals transmitted via the transmission antennas 1 a to 1 f mounted on the vehicle 20 via the reception antenna 18. The control unit 14 generates reception result information according to the position detection signal received by the reception unit 15 and instructs the transmission unit 16 to transmit a reception result signal according to the generated reception result information. The transmission unit 16 transmits a reception result signal via the transmission antenna 19 in response to the instruction.

  The reception result information is information indicating the reception status of the position detection signal via the reception antenna 18 in the reception unit 15. Specifically, for example, among the position detection signals transmitted from the six transmission antennas 1a to 1f, the number of received position detection signals (specifically, the number of received position detection signals). Number of transmission antennas of the transmission source) and information indicating the transmission antenna of the transmission source of the received position detection signal. Then, the number of position detection signals received by the receiving unit 15 based on the reception result signal based on the reception result information (specifically, the number of transmission antennas from which the received position detection signal is transmitted) and the position detection signal. The transmission antennas of the transmission sources are indicated.

  The control unit 14 causes the backlight control unit 13 to control the luminance of the LCD backlight 12 based on the instruction information transmitted via the Bluetooth antenna 4 on which the Bluetooth antenna 17 is mounted on the vehicle 20. Specifically, the duty ratio of the LCD backlight 12 is set to a value corresponding to the luminance value indicated by the instruction information. The value of the duty ratio according to the luminance value is, for example, based on a correspondence table prepared in advance, if the luminance value is x1 or more and less than x2, the duty ratio is α, and the luminance value is x2 or more and less than x3. For example, the duty ratio is set to β. The product of the luminance value multiplied by a predetermined coefficient may be used as the duty ratio value.

  Next, the operation of the embodiment of the present invention will be described. FIG. 4 is an explanatory diagram showing the relationship between each device mounted on the vehicle 20 and each device mounted on the mobile device 21. As shown in FIG. 4, the position detection signal transmitted from the transmission unit 10 mounted on the vehicle 20 via the transmission antennas 1 a to 1 f is received by the reception unit 15 via the reception antenna 18 mounted on the portable device 21. Received (illustrated by (1) in FIG. 4).

  The reception result signal transmitted from the transmission unit 16 of the portable device 21 via the transmission antenna 19 is received by the reception unit 9 via the reception antenna 2 mounted on the vehicle 20 ((2) in FIG. 4). (Illustrated).

  Then, the instruction information transmitted from the control unit 8 mounted on the vehicle 20 via the Bluetooth antenna 4 is received by the control unit 14 via the Bluetooth antenna 17 mounted on the portable device 21 (in FIG. 3)).

  FIG. 5 is a sequence diagram showing the operation of the embodiment of the present invention. As shown in FIG. 5, the control unit 8 mounted on the vehicle 20 instructs the transmission unit 10 to transmit a position detection signal. The transmission unit 10 transmits position detection signals via the transmission antennas 1a to 1f (step S101). The timing for transmitting the position detection signal is, for example, a predetermined time interval such as 10 minutes while the vehicle 20 is traveling, the time of starting the engine, or the time of starting lighting of the headlamps 5a and 5b.

  The receiving unit 15 of the portable device 21 receives the position detection signal (the position detection signal transmitted by the transmission unit 10 via the transmission antennas 1a to 1f in the process of step S101) via the reception antenna 18. Step S102).

  The control unit 14 of the portable device 21 instructs the transmission unit 16 to receive a reception result signal corresponding to the position detection signal received by the reception unit 15. The transmission unit 16 transmits a reception result signal via the transmission antenna 19 (step S103).

  The reception unit 9 of the vehicle 20 receives the reception result signal transmitted from the transmission unit 16 of the portable device 21 via the transmission antenna 19 via the reception antenna 2 (step S104).

  The control unit 8 of the vehicle 20 determines whether or not the portable device 21 is in the vehicle based on the reception result signal received by the reception unit 9 (step S105). Specifically, for example, when the reception result signal indicates that two or more (or three or four or more) position detection signals are received, the control unit 8 It is determined that the device 21 is in the vehicle. In other words, in the present embodiment, the control unit 8 of the vehicle 20 determines that the portable device 21 is in the vehicle when the number of transmission antennas that are transmission sources of the position detection signals received by the reception unit 9 is two or more. To do.

  When the control unit 8 of the vehicle 20 determines that the portable device 21 is not in the vehicle (N in Step S105), the process proceeds to Step S101. Further, when the control unit 8 of the vehicle 20 determines that the portable device 21 is in the vehicle (Y in Step S105), the control unit 8 determines a luminance value based on the illuminance measured by the illuminance sensor 3 (Step S106). Note that the control unit 8 determines the luminance value to be a small value when the illuminance measured by the illuminance sensor 3 is low, and determines the luminance value to be a large value when the illuminance measured by the illuminance sensor 3 is high. That is, the control unit 8 performs control so that the display screen of the portable device 21 is brightened when the surroundings of the vehicle 20 are bright, and the display screen of the portable device 21 is darkened when the surroundings of the vehicle 20 is dark. A data table indicating the correspondence between various illuminance values and corresponding luminance values is stored in the storage unit in advance.

  Then, the control unit 8 performs pairing processing based on the Bluetooth standard with the control unit 14 of the mobile device 21 via the Bluetooth antenna 4 and the Bluetooth antenna 17, and transmits instruction information to the control unit 14 (step). S107).

  Note that when a predetermined time has elapsed since the transmission of the instruction information (Y in step S108), the control unit 8 proceeds to the process in step S106 and performs the processes in steps S106 and S107. That is, the control unit 8 performs the processing of steps S106 and S107 at predetermined time intervals, and transmits instruction information corresponding to the illuminance around the vehicle 20 to the control unit 14.

  The control unit 14 of the portable device 21 that has performed pairing processing based on the Bluetooth standard with the control unit 8 mounted on the vehicle 20 receives instruction information from the control unit 8 via the Bluetooth antenna 17 and the Bluetooth antenna 4 ( Step S109). As described above, since the processes of steps S106 and S107 are performed at predetermined time intervals, the control unit 14 receives instruction information corresponding to the illuminance around the vehicle 20 at predetermined time intervals.

  The control unit 14 determines the duty ratio based on the luminance value indicated by the instruction information, and causes the backlight control unit 13 to change the luminance of the LCD backlight 12 with the duty ratio and turn on the light (step S110).

  In the present embodiment, the brightness of the display screen of the mobile device 21 is controlled according to the illuminance around the vehicle 20. Specifically, for example, when the surroundings of the vehicle 20 are dark, it is possible to control the display screen of the mobile device 21 to be dark. With such a configuration, it is possible to prevent the driver's attention from being distracted by the light of the display screen of the portable device 21 being reflected on the windshield or the like of the vehicle 20. This effect is particularly noticeable when driving at night.

  In the present embodiment, when the surroundings of the vehicle 20 are bright, the display screen of the portable device 21 is brightened. As described above, when the surroundings of the vehicle 20 is dark, the display screen of the portable device 21 is darkened. Therefore, the user of the portable device 21 can easily recognize the display content on the display screen regardless of whether the surroundings of the vehicle 20 are bright or dark. Yes, the portable device 21 can be used comfortably.

  In the present embodiment, since it is configured to automatically control the brightness of the display screen when it is recognized that the mobile device 21 is in the vehicle, the user of the mobile device 21 manually adjusts the brightness. Freed from annoyance. In addition, when a general portable device is brought into the vehicle 20 and the brightness is not adjusted, the driver may be distracted by being concerned about the display screen, but in this embodiment, The driver's attention can be prevented from being distracted.

  Furthermore, in this embodiment, since the existing illuminance sensor 3 installed in the vehicle 20 is used, it is not necessary to mount the illuminance sensor on the portable device 21, and an increase in the cost of the portable device 21 can be prevented.

  When the keyless entry system is mounted on the vehicle 20, the transmission antenna in the keyless entry system is used as the transmission antennas 1a to 1f, or the reception antenna in the keyless entry system is used as the reception antenna 2. Thus, a system for controlling the portable device 21 at a low cost can be realized.

  Further, when the mobile device 21 receives the position detection signal, the mobile device 21 sets information indicating the transmission antenna included in the position detection signal (corresponding to information indicating the installation position of the transmission antenna) as the reception result signal. The control unit 8 of the vehicle 20 may be configured to transmit the instruction information corresponding to the transmission antenna indicated by the reception result signal received by the reception unit 9 via the reception antenna 2 to the portable device 21.

  FIG. 6 is an explanatory diagram illustrating an example of the reachable range of the position detection signals transmitted via the transmission antennas 1a to 1f. In the example shown in FIG. 6, the portable device 21 in the passenger seat can receive the position detection signals transmitted via the transmission antennas 1a, 1b, 1c, and 1d. The transmission unit 16 of the portable device 21 transmits a reception result signal based on the reception result information indicating that the position detection signal transmitted via the transmission antennas 1a, 1b, 1c, and 1d has been received. Based on the reception result signal, the control unit 8 of the vehicle 20 determines that the portable device 21 is used in the passenger seat 31b installed in the first row, based on the illuminance measured by the illuminance sensor 3. Determine the brightness value. Then, the instruction information indicating the luminance value is transmitted to the mobile device 21. That is, the transmission place specified by the information included in the reception result signal (the installation position of the transmission antennas 1a, 1b, 1c, 1d based on the information that can identify the transmission antennas 1a, 1b, 1c, 1d) is the driver. When it is within a predetermined range from the existing position, the instruction information indicating the luminance of the display means in the portable device 21 is generated and transmitted based on the illuminance measured by the illuminance sensor 3. The controller 8 determines the luminance value to be a small value when the illuminance measured by the illuminance sensor 3 is low, and determines the luminance value to be a large value when the illuminance measured by the illuminance sensor 3 is high.

  On the other hand, when the portable device 21 is used in the rear seat 31e installed in the third row, the portable device 21 receives the position detection signal transmitted via the transmission antennas 1e and 1f. Is possible. The transmission unit 16 of the mobile device 21 transmits a reception result signal based on reception result information indicating that the position detection signal transmitted via the transmission antennas 1e and 1f has been received. Based on the reception result signal, the control unit 8 of the vehicle 20 assumes that the portable device 21 is used in the rear seat 31e or the rear seat 31f installed in the third row and does not affect driving. The mobile device 21 transmits instruction information for instructing brighter brightness than the case where the mobile device 21 is used in the passenger seat 31b installed in the first row to the mobile device 21 or does not transmit the instruction information. Also good. In such a configuration, the brightness of the display screen of the mobile device 21 is controlled according to the location (existing position) where the mobile device 21 is used, so that, for example, the driver is not affected. It is possible to prevent the luminance from being excessively lowered despite the situation.

  Further, it may be configured to transmit different instruction information depending on the location of each mobile device based on the information for identifying the mobile device. FIG. 7 is an explanatory diagram showing a case where a plurality of portable devices (the portable device 21 and the portable game machine 22) are used in the vehicle. In the example shown in FIG. 7, the portable device 21 is used in the passenger seat 31b installed in the first row, and the portable game machine 22 is used in the rear seat 31f installed in the third row.

  Moreover, the portable device 21 and the portable game machine 22 may be configured to transmit a signal based on information for identifying the device (for example, a device address in the Bluetooth standard) together with the reception result signal. In such a configuration, the control unit 8 of the vehicle 20 can be notified of the reception status of each device in the vehicle, and the brightness of the display screen can be controlled for each device. Specifically, for example, the brightness of the display screen of the portable device 21 located near the driver's seat 31a is decreased so that the brightness of the display screen of the portable game machine 22 located far from the driver's seat 31a is Do not decrease. That is, the brightness of the display screen can be controlled for each device according to the location of the device in the vehicle. In addition, since the degree of influence given to the driver differs depending on the size of the display screen of the device, the brightness is controlled according to the size of the display screen of each device based on the information for identifying the device. It may be configured.

  In the embodiment described above, the control unit 8 of the vehicle 20 determines whether or not the portable device 21 is in the vehicle based on the reception result signal. However, the control unit 14 of the portable device 21 receives the reception antenna. The mobile device 21 may be configured to determine whether or not the portable device 21 is in the vehicle according to the reception status of the reception unit 15 via the communication device 18. Specifically, for example, when the receiving unit 15 receives position detection signals transmitted from two or more transmission antennas via the reception antenna 18, the control unit 14 of the portable device 21 detects that the portable device 21 is in the vehicle. It is determined that Then, the control unit 14 of the portable device 21 performs pairing processing based on the Bluetooth standard with the control unit 8 of the vehicle 20.

  In such a configuration, the receiving antenna 2 and the receiving unit 9 of the vehicle 20 and the transmitting antenna 19 and the transmitting unit 16 of the portable device 21 are not necessary, and a system for controlling the portable device 21 at a lower cost is provided. Can be realized.

  In addition, depending on the size of the vehicle 20 and the place where the Bluetooth antenna 4 is installed, the control unit 8 of the vehicle 20 limits the communication distance based on the Bluetooth standard via the Bluetooth antenna 4 (a communicable distance in the vehicle. For example, the control unit 8 of the vehicle 20 and the control unit 14 of the portable device 21 may be configured to transmit and receive information based on the Bluetooth standard. FIG. 8 is an explanatory diagram showing a case where the control unit 8 of the vehicle 20 and the control unit 14 of the portable device 21 transmit and receive information based on the Bluetooth standard. In the example illustrated in FIG. 8, the control unit 8 of the vehicle 20 and the control unit 14 of the portable device 21 transmit and receive information based on the Bluetooth standard. In such a case, the receiving antenna 2, the receiving unit 9, the transmitting antennas 1a to 1f and the transmitting unit 10 of the vehicle 20, the receiving antenna 18, the receiving unit 15, the transmitting antenna 19 and the transmission of the portable device 21 are configured. The part 16 becomes unnecessary, and a system for controlling the portable device 21 can be realized at a lower cost.

  In the embodiment described above, the control unit 14 of the mobile device 21 causes the backlight control unit 13 to control the LCD backlight 12 based on the instruction information. However, the control unit 21 of the mobile device 21 includes the instruction information. Basically, the sound volume output from the speaker (not shown) of the portable device 21 may be controlled together with the brightness of the LCD 11 or separately from the brightness. Specifically, when the mobile device 21 is a mobile phone or a portable game machine, for example, when the instruction information indicates that the luminance value of the LCD backlight 12 is reduced, the mobile device 21 The control unit 14 is configured to reduce the volume of sound output to the speaker, or configured to vibrate a vibrator (vibration generating unit) instead of outputting sound from the speaker. In such a configuration, the driver's discomfort due to the sound output from the speaker of the portable device 21 can be reduced.

  In the embodiment described above, the control unit 8 of the vehicle 20 and the control unit 14 of the portable device 21 have been described as transmitting and receiving information based on the Bluetooth standard, but the present invention is not limited thereto. Alternatively, information may be transmitted / received based on a wireless LAN (Local Area Network) standard.

  In the embodiment described above, the brightness of the portable device 21 brought into the vehicle 20 is controlled. However, the transmission antenna 1a is used for an airplane, a train, a movie theater, a public hall, and a concert hall. ˜1f, the receiving antenna 2, the Bluetooth antenna 4 and the like may be installed to control the luminance of the portable device brought into those places. When configured in such a manner, it is possible to prevent inconvenience to others when the mobile device is used in those places.

  Next, the outline of the present invention will be described. FIG. 9 is a flowchart showing an outline of the present invention. As shown in FIG. 9, in the portable device control method according to the present invention, the transmission means installed in the vehicle transmits a signal that can reach a predetermined range in the vehicle (step S1), and is transmitted from the vehicle. When the portable device that has received the signal transmits a reception status signal that is a signal in response to the signal (steps S2 and S3) and the vehicle has received the reception status signal, the control unit in the vehicle When it is determined that the portable device is brought into the vehicle (step S4), the luminance of the display unit in the portable device is determined based on the illuminance measured by the illuminance measuring unit when the portable device is determined to be brought into the vehicle. Is generated and transmitted (step S5), and the portable device controls the luminance of the display means in the portable device based on the instruction information received from the vehicle (step S6).

  In the process of step S1, the transmission means transmits a signal that can reach a predetermined range from each of the plurality of locations in the vehicle and can be distinguished from signals transmitted from other locations, step S3. In the process, the portable device transmits a reception status signal including information indicating the number of signals received from the vehicle, and in the process of step S4, information indicating that the control unit in the vehicle has received a plurality of signals. If it is included in the received reception status signal, it may be determined that the portable device is brought into the vehicle. In the case of such a configuration, it can be more reliably determined whether or not a portable device exists in the vehicle.

  In the process of step S1, the transmission means transmits a signal that can reach a predetermined range and includes information that can specify the transmission place from a plurality of places in the vehicle. The device transmits a reception status signal including information that can identify the transmission location included in the signal received from the vehicle, and in the processing of steps S4 and S5, the vehicle is the information included in the reception status signal. When the specified transmission location is within a predetermined range from the driver's location, the instruction information indicating the brightness of the display means in the portable device is generated and transmitted based on the illuminance measured by the illuminance measurement means. Also good. In the case of such a configuration, appropriate brightness control can be performed in accordance with the position where the mobile device is present in the vehicle.

  The mobile device may control the volume of the audio output means in the mobile device based on the instruction information received from the vehicle. In the case of such a configuration, it is possible to prevent the sound output from the portable device from interfering with the driving of the driver.

  The mobile device may control vibration generating means in the mobile device based on the received instruction information received from the vehicle. In such a configuration, it is possible to prevent the vibration generated by the portable device from interfering with the driving of the driver.

  The present invention can be used in a system for controlling a portable device brought into a vehicle.

DESCRIPTION OF SYMBOLS 1a-1f Transmission antenna 2 Reception antenna 3 Illuminance sensor 4 Bluetooth antenna 5a, 5b Headlamp 6 Car navigation apparatus 7 Instrument panel instrument 8 Control part 9 Reception part 10 Transmission part 11 LCD
DESCRIPTION OF SYMBOLS 12 LCD backlight 13 Backlight control part 14 Control part 15 Reception part 16 Transmission part 17 Bluetooth antenna 18 Reception antenna 19 Transmission antenna 20,100 Vehicle 21,200 Portable apparatus 22 Portable game machine 31a Driver's seat 31b Passenger seat 31c-31f back seat

Claims (7)

A portable device control method for controlling the luminance of display of a portable device brought into a vehicle in which an illuminance measuring means for measuring ambient illuminance is installed,
The transmission means installed in the vehicle transmits a signal that can reach a predetermined range in the vehicle,
The mobile device that has received the signal transmitted from the vehicle transmits a reception status signal that is a signal in response to the signal,
When the vehicle can receive the reception status signal, the control unit in the vehicle determines that a portable device is brought into the vehicle,
When it is determined that the portable device is brought into the vehicle, the vehicle generates and transmits instruction information indicating the luminance of the display unit in the portable device based on the illuminance measured by the illuminance measurement unit,
A portable device control method, wherein the portable device controls luminance of display means in the portable device based on the instruction information received from the vehicle. The transmission means transmits a signal that can reach a predetermined range from each of a plurality of locations in the vehicle and can be distinguished from signals transmitted from other locations,
The portable device transmits a reception status signal including information indicating the number of signals received from the vehicle,
The portable device according to claim 1, wherein the control unit in the vehicle determines that the portable device is brought into the vehicle when information indicating that a plurality of signals has been received is included in the received reception status signal. Control method. The transmission means transmits a signal that can reach a predetermined range from a plurality of locations in the vehicle and includes information that can identify the transmission location,
The mobile device transmits a reception status signal including information that can identify a transmission location included in the signal received from the vehicle,
Display means in a portable device based on the illuminance measured by the illuminance measuring means when the vehicle is located within a predetermined range from the driver's location where the transmission location specified by the information included in the reception status signal is The portable device control method according to claim 1, wherein instruction information indicating the brightness of the device is generated and transmitted. The portable device control method according to any one of claims 1 to 3, wherein the portable device controls the volume of sound output means in the portable device based on the instruction information received from the vehicle. The portable device control method according to any one of claims 1 to 4, wherein the portable device controls vibration generating means in the portable device based on the received instruction information received from the vehicle. An illuminance measuring means for measuring ambient illuminance is installed, and is a portable device capable of controlling the luminance of display when it exists in a vehicle that transmits a signal that can reach a predetermined range in the vehicle,
A reception status signal transmitting means for transmitting a reception status signal that is a signal in response to the signal when the signal transmitted from the vehicle is received;
Instruction information receiving means for receiving the instruction information indicating the brightness of the display means in the portable device, which is information that the vehicle that has received the reception status signal creates and transmits based on the illuminance measured by the illuminance measuring means;
A portable device comprising: control means for controlling brightness of display means based on the instruction information received from the vehicle. The reception status signal transmission means is a signal that can reach a predetermined range transmitted from each of a plurality of locations in the vehicle and that can be distinguished from a signal transmitted from another location. The portable device according to claim 6, wherein a reception status signal including information indicating the number of received signals is transmitted.

Images