JP2006199281A - Hands-free telephone device for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hands-free telephone device for an automobile allowing a driver to safely drive, while being free from paying attention to the arrival of a mobile telephone call. <P>SOLUTION: With a mobile telephone call in the condition wherein the mobile phone 10 is set in a telephone holder 11 of an automobile, display is performed to inform about the telephone call to the peripheral vision region outside the central vision region in the visual field of the driver with a HUD 60 without sounding an audible ringing. With this structure, the driver can respond to the telephone call of the mobile phone only in the condition wherein the driving burden on the driver is small enough that the driver can notice telephone call display displayed in only the peripheral vision region without sounding the audible ringing. In the case wherein the driver notices the telephone call display and operates an input operation button 30, a controller 20 controls a brake actuator 140 and a throttle actuator 150 to automatically perform the adaptive cruise following control at a reference adaptive cruise distance longer than the ordinary adaptive cruise distance. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an automotive hands-free telephone device.

  Conventionally, it has been proposed to fix a hands-free telephone device that enables a telephone call without having to hold the telephone in a vehicle interior of a car. Free telephone devices have been proposed.

In such an automobile hands-free telephone device, as disclosed in Patent Document 1, it is predicted that the load of driving operation will be large for the driver during a call or outgoing call operation, or will soon be in such a state. When this is done, a device having a function of notifying the fact and putting the call on hold or putting the call on hold is known.
JP-A-10-304464

  However, the conventional automobile hands-free telephone device has the following problems. In a conventional automobile hands-free telephone device, when the load of driving operation becomes a large state for the driver, or when the sensor output and the output of the navigation system are applied to the call holding condition that is predicted to become such a state soon, Even if the driver wants to talk because he / she has enough driving operation, the telephone cannot be used uniformly. However, the call hold conditions differ for the driver, and the output of the sensors is not necessarily adapted to the driving ability of each driver, so it can be used if the driver wants to use the telephone when the driving burden on the driver is not large. It is preferable to do so.

  In general, in driving a car, when the driver is gazing forward through the windshield, a central viewing area 63 and a peripheral viewing area 64 are included in the driver's visual field 100 projected onto the windshield 62 as shown in FIG. is there. The visual field 100, the central viewing area 63, and the peripheral viewing area 64 are defined as follows.

  (I) With reference to FIG. 10, the seating reference point R is determined as follows. The seat of the driver's seat (the one that can be adjusted forward and backward is the rearmost position, the one that can be adjusted up and down is the lowest position, the one that can adjust the seat back angle and seat cushion mounting angle is the design standard angle (once the seat is released once The position of the hip point H when the human body model defined in ISO 6549-1980 is seated in the state adjusted to the angle at which the lock is applied) is defined as the R point.

(Ii) From the R point determined in (i), V1 and V2 points are determined as shown in Table 1 below. The coordinates of X, Y, and Z are taken as shown in FIG.

  (Iii) The A zone and the B zone are determined on the windshield 62 based on the points V1 and V2 determined in (ii). First, as shown in FIG. 11, when the line horizontal from the point V1 to the traveling direction of the vehicle is the A1 line and the line horizontal from the point V2 to the traveling direction of the vehicle is the A2 line, it is 3 ° upward from the A1 line. If the B1 line is the B1 line and the B1 line is a line 1 ° downward from the A2 line, the area above the B1 line is the B zone, the area between the B1 line and the B2 line is the A zone, and below the B2 line The area on the side is determined as the B zone. If the A zone and the B zone are projected onto the windshield 62 on the driver side of the vehicle, the result is as shown in FIG.

  (Iv) The projection area of the driver's visual field 100 onto the windshield 62 is defined as follows. In the human body model specified in ISO 6549-1980, the position of the eye is set as point E. Then, as shown in FIG. 13, the visual field 100 is defined as 60 ° upward, 80 ° downward, and 100 ° laterally with respect to a horizontal line from the point E to the vehicle traveling direction. The outer periphery of the visual field 100 is the outer edge of the peripheral viewing area 64.

  (V) When the zone determined in (iii) and the field of view 100 determined in (iv) are overlapped, as shown in FIG. A field of view 65 is determined.

  The central viewing area 63 in the field of view 100 determined in this way is an area in which the driver who is gazing forward can accurately recognize the display reflected in the viewing area without moving the viewpoint, and the peripheral viewing area 64 is included therein. When something is displayed on the screen, it can be recognized that something is displayed, but in order to correctly recognize what the display is, it is an area where the viewpoint needs to be moved to the display position.

  Therefore, the driver can immediately recognize that something is displayed in the central viewing area, but if something is displayed in the surrounding viewing area, the driver's burden is heavy and there is not enough room. If the user is not aware of the display and the driving load is light, the display is noticed.

  The present invention has been made based on such considerations, and the driver notices the display even if the incoming call is displayed at a place outside the central viewing area of the driver by the display means without ringing the ringing tone when the incoming call is received. If so, it is an object of the present invention to provide an automobile hands-free telephone device which can be regarded as a situation where the driving operation has a margin and can answer the call.

  In the present invention, the driver also burdens the driver when he / she picks up the phone when he / she notices the display of the incoming call at a place outside the central viewing area by the display means. An object is to provide an automobile hands-free telephone device that enables a driver to drive with confidence by resetting the following inter-vehicle distance to a value longer than the specified inter-vehicle distance, or by controlling the braking / driving force. And

  The invention according to claim 1 is a communication control means for controlling a mobile telephone, a display means for displaying various information, a microphone and a speaker for hands-free calling, while keeping the inter-vehicle distance to the preceding vehicle at the reference inter-vehicle distance. An inter-vehicle distance follow-up control means that follows, and an operation input means, wherein the communication control means does not sound a ringing tone when it detects an incoming call of the mobile telephone, and displays a display notifying the incoming call on the display means. Then, when there is an input from the operation input means within a predetermined time, a call line is established to enable a hands-free call using the microphone and the speaker, and tracking control by the inter-vehicle distance tracking control means is in progress. For example, the automatic inter-vehicle distance tracking control is continued by resetting the reference inter-vehicle distance with respect to the preceding vehicle to a value longer than the normal reference inter-vehicle distance. It is a use hands-free phone device.

  According to a second aspect of the present invention, in the automobile hands-free telephone device according to the first aspect, the communication control means does not sound a ringing tone when the incoming call of the mobile telephone is detected, and the incoming call is sent to the display means. When an input is made from the operation input means within a certain period of time after that, a call line is established to enable a hands-free call using the microphone and speaker, and follow-up by the inter-vehicle distance follow-up control means An automotive hands-free telephone device characterized in that, if control is not performed, the reference inter-vehicle distance with respect to the preceding vehicle is set to a value longer than the normal reference inter-vehicle distance and the control automatically shifts to inter-vehicle distance tracking control. .

  The invention according to claim 3 is a communication control means for controlling a mobile telephone, a display means for displaying various information, a microphone and a speaker for a hands-free call, and a reference inter-vehicle distance according to the vehicle speed. A braking / driving force control means for controlling the braking / driving force of the vehicle so as to match the distance; and an operation input means; and the communication control means does not sound a ringing tone when detecting an incoming call of the mobile phone, Allowing the display means to display the incoming call, and when there is an input from the operation input means within a certain period of time, establishes a call line and enables a hands-free call with the microphone and speaker; and A hand-free telephone device for an automobile, wherein a braking force is applied when an inter-vehicle distance to a preceding vehicle is shorter than the reference inter-vehicle distance.

  According to a fourth aspect of the present invention, in the automobile hands-free telephone device according to the third aspect, further comprising a brake pedal operation detecting means for detecting whether or not the brake pedal is operated, wherein the communication control means is fixed to the telephone holder. When an incoming call of a mobile telephone is detected, a ringing tone is not sounded, and a display for notifying the incoming call is displayed on the display means. To enable a hands-free call with the microphone and the speaker, and when the inter-vehicle distance to the preceding vehicle is shorter than the reference inter-vehicle distance, the first braking force is applied, and then the brake pedal operation is detected within a predetermined time. When a brake pedal operation by the means is not detected, a second braking force greater than the first braking force is applied. That.

  The invention according to claim 5 is the automobile hands-free telephone device according to any one of claims 1 to 4, wherein the display means is a head-up display.

  In the automobile hands-free telephone device according to the first aspect of the present invention, when a telephone call is received with the mobile telephone set in the telephone holder of the automobile, only the incoming call is displayed on the display means without ringing. To do. When the driver notices the incoming call display and responds by the input means to make a hands-free call, when the inter-vehicle distance follow-up control is being performed by the inter-vehicle distance follow-up control means, the reference inter-vehicle distance of the inter-vehicle distance follow-up control is set. The distance follow-up control is continued by resetting to a value longer than the normal value.

  In this way, if the incoming call is received, only the incoming call is displayed without ringing, so that the driver can answer the incoming call to the mobile phone when the driver is light enough to notice the incoming call display. In addition, when the driver notices the incoming call and answers the phone, the driver's load can be reduced by resetting the reference inter-vehicle distance to a value longer than the normal value during inter-vehicle distance tracking control. Will be able to drive with confidence.

  In the automobile hands-free telephone device of the invention according to claim 2, when a telephone call is received with the mobile telephone set in the telephone holder of the automobile, only the incoming call is displayed on the display means without ringing. To do. When the driver notices the incoming call display and responds by the input means to make a hands-free call, if the inter-vehicle distance follow-up control means is not performing inter-vehicle distance follow-up control, the follow-up inter-vehicle distance control is automatically performed. The inter-vehicle distance follow-up control is performed by setting the reference inter-vehicle distance of the inter-vehicle distance follow-up control to a value longer than a normal value.

  In this way, if the incoming call is received, only the incoming call is displayed without ringing, so that the driver can answer the incoming call to the mobile phone when the driver is light enough to notice the incoming call display. In addition, when the driver notices the incoming call and answers the call, the driver's load can be reduced by shifting to inter-vehicle distance tracking control and setting the reference inter-vehicle distance to a value longer than the normal value. You can drive with confidence.

  In the automobile hands-free telephone device of the invention according to claim 3, when a telephone call is received with the mobile telephone set in the telephone holder of the automobile, only the incoming call is displayed on the display means without ringing. To do. When the driver notices the incoming call display and responds with the input means, a call line is established to enable a hands-free call with the microphone and the speaker, and when the inter-vehicle distance with respect to the preceding vehicle is shorter than the reference value, the control is performed. A braking force is applied by the driving force control means.

  In this way, even if there is an incoming call, only the incoming call is displayed without ringing, so that the driver can answer the incoming call to the mobile phone in a situation where the driving load is light enough to notice the incoming call display. In addition, when the driver notices the incoming call display and answers the phone, the braking / driving force control means is activated and the braking force is applied if the inter-vehicle distance to the preceding vehicle becomes shorter than the reference value. So that you can drive with confidence.

  In the automobile hands-free telephone device of the invention according to claim 4, when a telephone call is received with the mobile telephone set in the telephone holder of the automobile, only the incoming call is displayed on the display means without ringing. To do. When the driver notices the incoming call display and responds with the input means, a call line is established to enable a hands-free call with the microphone and the speaker, and when the inter-vehicle distance with respect to the preceding vehicle is shorter than the reference value, the control is performed. The first braking force is applied by the driving force control means, but if the operation of the brake pedal is not detected within a certain time thereafter, a second braking force greater than the first braking force is applied.

  As a result, when the driver notices the incoming call display on the mobile phone and answers the call, the braking / driving force control means is activated, and the braking force is reduced to the first braking force if the inter-vehicle distance to the preceding vehicle becomes shorter than the reference value. Applying power, and if the driver does not depress the brake pedal within a certain period of time, applying a second braking force that is stronger than that will reduce the driver's brake operation load and make driving even more secure To do.

  In the invention which concerns on Claim 5, the display of a telephone call can be confirmed by employ | adopting a head-up display as a display means, and moving a driver | operator's eyes | visual_axis during driving a little.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the configuration of an automotive hands-free telephone device according to a first embodiment of the present invention. For example, a mobile phone 10 such as a car phone or a mobile phone is set and held in a phone holder 11. The telephone holder 11 is connected to a communication control unit (controller) 20. When the mobile telephone 10 is set in the telephone holder 11, the mobile telephone 10 can be controlled from the controller 20.

  An input button 30, a microphone 40, a speaker 50, a HUD (head-up display) 60, and a vehicle speed sensor 110 are connected to the controller 20, and the controller 20 controls these in an integrated manner.

  The input button 30 connects the mobile telephone 10 to a communication line (wireless line) by operating a call start button (not shown) when the mobile telephone 10 receives an incoming call. Make calls free.

  As shown in FIG. 3, the HUD 60 has a projector (not shown) embedded in the instrument panel, and the projection light from the projector is placed at a predetermined position on the windshield 62 through an opening 60A provided in the instrument panel. The icon 67 indicating the incoming call, the telephone number of the incoming call, and the name, name, or abbreviation of the other party corresponding to the telephone number are displayed in the mobile telephone 10 if the telephone number is registered. To do. Details thereof will be described later.

  The controller 20 detects an incoming call to the mobile phone 10, sends a response message recorded in advance when an incoming call is automatically answered to an incoming call, or sends a response message prompting an absence recording Message sending function, recording / playback function for recording and playing back the caller of the incoming phone call, detecting and storing the incoming phone number, and calling the incoming phone number stored in it Fulfills the phone number storage function. A CPU 21, a ROM 22, and a RAM 23 are provided for storing programs and data necessary for these functions and performing arithmetic processing.

  Next, the operation of the automobile hands-free telephone apparatus having the above configuration will be described. FIG. 2 is a flowchart showing the communication control operation. By setting the mobile telephone 10 in the telephone holder 11, the mobile telephone 10 is automatically connected to the controller 20 and can exchange signals.

  When this mobile telephone 10 is set in the telephone holder 11, the ringing volume is turned off (minimum volume), and the incoming call waiting state is set (step S100). If there is an incoming call (step S110), the controller 20 displays the incoming call on the HUD 60 (step S120). The incoming call display mode by the HUD 60 is as shown in FIG.

  FIG. 3 shows the relationship between the windshield 62 that projects the information required by the HUD 60 and the forward view that the driver sees while driving. For the driver who is gazing at the front, there is a central viewing area 63, a peripheral viewing area 64 around the central viewing area 63, and an area 65 that is not visible to the driver. The difference between the central viewing area 63 and the peripheral viewing area 64 is that the visual field narrows and the peripheral viewing area 64 becomes extremely narrow when the burden of driving operation increases for the driver. Therefore, when the icon 67 presenting the incoming call is displayed in the central viewing area 63 by the controller 60, the driver notices the incoming call icon 67 even if the burden of driving operation is large, but the incoming call icon 67 is displayed in the peripheral viewing area 64. And when the burden of driving operation is heavy, the driver does not notice it.

  Therefore, the ringing tone is not sounded when a call is received, and the incoming call icon 67 is displayed in the peripheral viewing area 64. If the incoming call icon 67 is displayed in the peripheral area in this manner, the burden on the driving operation is heavy for the driver. Therefore, in a situation where nerves should be concentrated on the driving operation, the display of the incoming call icon 67 is not noticed in the situation so Although it does not appear, in a situation where there is a margin in the driving operation to the extent that the driver notices the display of the peripheral viewing area, the driver can notice the display of the incoming call icon 67 and answer the call. Although the HUD 60 may display the vehicle speed, when the vehicle speed display 68 is presented, it is desirable to display the incoming call icon 67 at a position different from the position.

  When the driver notices such an incoming call icon 67 and answers the call, he / she makes a hands-free call by operating the call start switch with the input button 30 (steps S130 and S140). However, when there is no driving allowance and the user does not notice the display of the incoming call icon 67 and a certain time has elapsed after the incoming call, the process shifts to an automatic incoming call response (step S150).

  In the automatic incoming call response, the absence recording function is activated, the controller 20 sends a message indicating that the telephone cannot be answered by the message sending function (step S160), and the caller's message is recorded by the recording / playback function (step S160). S170). When the other party hangs up, the automatic call process is terminated (step S180), and an icon indicating absence recording is displayed at the same position as the incoming call icon by the HUD 60 (step S190).

  If the driver notices the display with absence recording and operates the reproduction switch by the input operation unit 30, the recording / reproduction unit 90 reproduces the recorded message and outputs it from the speaker 50 (steps S200 and S210). In parallel with the absence recording process, the telephone number of the incoming call is stored by the telephone number storage function (step S220).

  In this way, the driver reproduces the absence recording, listens to the message, and calls back to the stored telephone number if necessary (step S230). Here, the incoming telephone number is stored in step S220. However, the telephone number storage process may be performed in step S120 at the same time as detecting the incoming call, or in step S150 in the automatic incoming call response process. The order of processing is not particularly limited.

  In this way, in the automobile hands-free telephone device of the first embodiment, when there is an incoming call with the mobile telephone 10 set in the telephone holder 11 of the automobile, the HUD 60 is not ringed without ringing. Displaying only incoming calls and automatically switching to automatic incoming call processing when no one answers the call after a certain period of time, so the driver's driving load is heavy and he does not notice the incoming call display Under such circumstances, the driver can drive without being surprised by the incoming call of the mobile phone and without worrying about whether there is an incoming call.

  In addition, the incoming call display is performed in an area corresponding to the peripheral visual field 64 out of the central viewing area 63 of the driver's visual field, so that the driver does not ring and the incoming display is displayed only in the peripheral visual field. As the user notices, he / she can answer a call to a mobile phone only under a light load for driving.

  Also, when there is no response within a certain period of time after detecting an incoming call, the system switches to the absence recording process, so that even if there is an incoming call, the burden of driving operation is heavy and the driver does not notice the incoming call display. Can automatically record voice messages, and the driver can concentrate on driving without worrying about the incoming call display.

  Furthermore, when an absence recording is made, an icon indicating “with absence recording” is displayed on the HUD 60 in the peripheral vision area of the driver, so that the absence recording can be performed only in a situation where the driver notices the icon display with absence recording. In the situation where there is a large driving load such that the display with absence recording is not noticed, the absence recording requirement is not reproduced, so that the driver's driving operation is not hindered.

  In addition, the phone number of the incoming call is automatically memorized, so it is possible to call back to the caller later even in situations where there is not enough room to drive and the driver does not notice the incoming call display. This will allow you to concentrate on driving without worrying about losing your appreciation.

  In the first embodiment, when the vehicle speed sensor 110 is connected to the controller 20 as shown in FIG. 1 and the incoming call 67 is displayed in the peripheral viewing area 64 of the driver by the HUD 60, the vehicle speed increases. It is possible to provide a function of displaying at a position closer to the central viewing area 63. This is due to the following reason.

  As the vehicle speed increases, the peripheral viewing area 64 of the driver becomes narrower. Therefore, if the position of the incoming call display icon 67 in the peripheral viewing area 64 is fixed, if the vehicle speed increases, it will deviate from the peripheral viewing area 64 and become an area 65 invisible to the driver, and the driver will notice the incoming call at all. It will disappear. However, even if the speed is relatively high, the driver's driving load is small and the driver can afford to recognize the peripheral viewing area. Even if the ringing tone does not sound, the incoming call displayed in the peripheral viewing area 64 is indicated. This is because it is preferable to be able to answer the telephone if the icon 67 is noticed.

  Next, a second embodiment of the automobile hands-free telephone device of the present invention will be described with reference to FIGS. The feature of the second embodiment is that when there is an incoming call with the mobile telephone 10 set in the telephone holder 11 of the automobile, only the incoming call is displayed on the HUD 60 without sounding the ringing tone. The controller 20 as the driving assist means performs control to follow the preceding vehicle by taking a longer inter-vehicle distance than the normal reference inter-vehicle distance when recognizing the incoming call display and performing a call start operation using the input button 30.

  As shown in FIG. 4, in the automobile hands-free telephone device of the second embodiment, the mobile telephone 10 is fixed by a telephone holder 11 as in the first embodiment.

The telephone holder 11 is connected to the controller 20. When the mobile telephone 10 is set in the telephone holder 11, the mobile telephone 10 can be controlled from the controller 20.

  As in the first embodiment, the input button 30, the microphone 40, the speaker 50, the HUD 60, and the vehicle speed sensor 110 are connected to the controller 20. Further, in the second embodiment, a brake actuator 140, a throttle actuator 150, and a laser radar 160 for measuring the inter-vehicle distance are connected to the controller 20 for inter-vehicle distance tracking control so that the controller 20 can control them. .

  The inter-vehicle distance tracking control function of the controller 20 continuously measures the inter-vehicle distance with respect to the preceding vehicle immediately before the own vehicle by the laser radar 160, and this is a reference determined in advance with respect to the own vehicle speed output from the vehicle speed sensor 110. The brake actuator 140 and the throttle actuator 150 are controlled so as to coincide with the inter-vehicle distance, and braking force and driving force (not shown) are controlled.

  Next, the operation of the automobile hands-free telephone apparatus of the second embodiment having the above-described configuration will be described with reference to the flowchart of FIG. When the mobile telephone 10 is fixed to the telephone holder 11, the ringing volume is turned off (minimum volume) by the signal from the controller 20 so that it cannot be heard by the driver and waits for an incoming call (steps S300 and S310).

  If there is an incoming call, the incoming call is displayed on the HUD 60 with characters or icons. The display by the HUD 60 may be displayed in the peripheral viewing area of the driver in the second embodiment as in the first embodiment, but it is not a HUD but a fixed liquid crystal or CRT display. You can just display it on the screen.

  In response to this incoming call display, if the driver does not start a call by operating the input button 30 even after a certain period of time has elapsed, switching to an automatic incoming call response is performed, and an absence recording process is performed as in the first embodiment. Alternatively, a fixed response message, for example, “I am currently driving and cannot answer the call” is sent out, the incoming telephone number is stored, and the call is terminated (S350). In order to make such an automatic incoming call response function work also in the second embodiment, the necessary functions are incorporated in the controller 20 as a program, as in the first embodiment shown in FIG. It shall be.

  On the other hand, when the driver notices the incoming call display and performs an operation to start a call from the input button 30, the process shifts to a hands-free call (steps S330 and S340). Then, the controller 20 performs inter-vehicle distance tracking control. That is, if the inter-vehicle distance tracking control is already in progress, the control is continued, and if the inter-vehicle distance tracking control is not entered, the control is forcibly shifted to the inter-vehicle distance tracking control (step S360).

  In this inter-vehicle distance tracking control, the reference inter-vehicle distance is set based on the vehicle speed measured by the vehicle speed sensor 110. If a signal during a telephone call is received from the controller 20, the reference inter-vehicle distance set in the normal inter-vehicle distance tracking control. A constant coefficient k is multiplied by the distance D (k · D), and the inter-vehicle distance tracking control is performed by setting the reference inter-vehicle distance to be longer (step S370). For example, when the vehicle speed is 50 km / h and the reference inter-vehicle distance is 25 m, this is multiplied by k = 1.2 and 30 m is newly set as the reference inter-vehicle distance. However, the value of the coefficient k is not limited to this.

  In this way, if the driver notices the incoming call without starting the ringing tone for the incoming call and starts the call, the inter-vehicle distance tracking control, which is one of the driving assist functions, is forcibly started. In addition, the preceding vehicle follow-up control is performed so as to keep the reference inter-vehicle distance set longer than the normal reference inter-vehicle distance, or if the inter-vehicle distance follow-up control is already in progress, the reference inter-vehicle distance is increased. Since the setting is made, it is possible to reduce the driving load of the driver, which increases when the user answers the phone.

  Next, a third embodiment of the automobile hands-free telephone device of the present invention will be described with reference to FIGS. The automobile hands-free telephone device of the third embodiment shown in FIG. 6 is the same as that of the second embodiment except that a brake switch 170 is additionally connected to the controller 20 in the configuration shown in FIG. Same as the configuration.

  The brake switch 170 is a switch that is turned on when the driver depresses the brake pedal deeply to some extent or suddenly applies the brake.

  Next, the operation of the automobile hands-free telephone apparatus according to the third embodiment having the above-described configuration will be described with reference to the flowchart of FIG. When the mobile telephone 10 is fixed to the telephone holder 11, the ringing volume is minimized by the signal from the controller 20 so that it cannot be heard by the driver, and waits for an incoming call (steps S400 and S410).

  If there is an incoming call, the incoming call is displayed on the HUD 60 with characters or icons. The display by the HUD 60 may be displayed in the peripheral visual area of the driver as in the first embodiment, but it is not a HUD but only a fixed liquid crystal or CRT display displayed on the screen. But you can.

  In response to this incoming call display, if the driver does not start a call by operating the input button 30 even after a certain period of time has elapsed, switching to an automatic incoming call response is performed, and an absence recording process is performed as in the first embodiment. Alternatively, a fixed response message is transmitted, the incoming telephone number is stored, and the call is terminated (S450). In addition, in order to make such an automatic incoming call response function work also in the third embodiment, it is assumed that necessary components are provided as in the first embodiment shown in FIG.

  On the other hand, when the driver notices the incoming call display and performs an operation to start a call from the input button 30, the process shifts to a hands-free call (steps S430 and S440).

  When shifting to this hands-free call, the vehicle is controlled to follow the distance between the vehicles. That is, the inter-vehicle distance from the preceding vehicle is detected by the laser radar 160, and the brake actuator 140 and the throttle actuator 150 are controlled so as to be the inter-vehicle distance based on this (steps S460 to S462).

  Then, it is determined whether or not the detected inter-vehicle distance is less than or equal to a predetermined reference inter-vehicle distance (step S470). If the detected inter-vehicle distance is less than or equal to the reference inter-vehicle distance, the control of steps S460 to S462 is repeated (branch to YES) to exceed the reference inter-vehicle distance. If NO, the process branches to NO, and the process proceeds to step S471.

  In step S471, the brake actuator 140 applies a light braking force with a weak deceleration, and the HUD 60 prompts the driver to perform a brake operation.

Then, it is determined whether or not there is an input indicating that the brake pedal has been depressed from the brake switch 170 within a certain time (step S472).

  Then, if there is an input from the brake switch 170 within a certain time, the control returns to the following distance control in step S460 (branch to YES in step S472), but if there is no input, it branches to NO and the brake actuator 140 causes a strong deceleration suddenly. The brake is applied (step S473).

  In this way, if the driver notices the incoming call without starting ringing in response to the incoming call and starts the call, the inter-vehicle distance tracking control is performed and the control is performed based on the inter-vehicle distance from the preceding vehicle. Since the power is forced to work, it is possible to reduce the driver's driving operation load that increases by answering the phone.

  Next, a fourth embodiment of the automobile hands-free telephone device according to the present invention will be described with reference to FIG. 1, FIG. 8, and FIG. The feature of the fourth embodiment is that the incoming call is notified to the driver only by displaying without ringing, and the absence recording function is activated when the driver does not notice the indication within a certain time. The recording is done digitally, and the summary is automatically created, and the summary of the message is heard in response to the playback instruction. Therefore, in the automobile hands-free telephone apparatus of the fourth embodiment, the controller 20 has a recording / reproducing function shown in the flowchart of FIG. Other functions are the same as those in the first embodiment shown in FIG.

  As shown in FIG. 8, the recording / playback function of the controller 20 is as follows. The other party's analog voice signal received and recorded by the mobile telephone 10 is A / D converted into a digital voice signal (steps S90 and S91), and voice recognition is performed on the digital voice signal to convert it into text data (step S90). (S92) Further, a summary text is created for the text data that has been voice-recognized by applying a technique that has been widely adopted by word processor applications in the past (step S93). If there is an instruction to reproduce the absence recording from the input button 30 via the controller 20, the summary text data is converted into read-out voice data by a voice synthesis technique (step S94), and this is D / A converted to an analog voice signal. And output from the speaker 50 (steps S95 and S96).

  The operation of the automobile hands-free telephone apparatus of the fourth embodiment having such an automatic summary creation function will be described with reference to the flowchart of FIG. As in the first embodiment, the mobile telephone 10 is fixed to the telephone holder 11 to turn off the ringing volume and enter the incoming call waiting state (step S500). If there is an incoming call (step S510), the incoming call is displayed by the HUD 60 without ringing (step S520). Here, the incoming call display mode by the HUD 60 is displayed in the peripheral viewing area 64 of the driver as in the first embodiment. However, in the case of this embodiment, the position of the incoming call display is not particularly limited, and it may be displayed on the screen of a liquid crystal display or CRT display installed on a normal instrument panel.

  When the driver notices such an incoming call display and answers the call, operating the call start switch with the input button 30 enables a hands-free call (steps S530 and S540).

  Even if the incoming call is displayed, if the driver does not notice the incoming call display within a certain period of time due to a heavy driving operation, the process proceeds to an automatic incoming call response (step S550). In the automatic incoming call response, the absence recording function is activated to send a message to the other party (caller) that he / she cannot answer the call (step S560), and the caller's message is digitally recorded (step S570).

  If the other party hangs up, the automatic call process is terminated (step S580).

Thereafter, the digitally recorded message is recognized by the recording / playback function and converted into text data (step S590), and a summary is created from the text data (step S600). Then, the HUD 60 displays a message indicating that there is an absence recording, similarly to the incoming call display (step S610).

  If the driver notices this absence recording display and operates the playback switch with the input button 30, the summary text data is synthesized with speech, converted to an analog speech signal by D / A conversion, and the summary of the message is obtained from the speaker 50. Is output as voice (steps S620 and S630).

  In parallel with the absence recording process, the controller 20 stores the telephone number of the incoming call (step S640). Note that the telephone number storing process in step S640 is not limited to being executed at this stage, and may be performed in step S520 at the same time as detecting an incoming call, or in step S550 for entering an automatic incoming call answering process. It may be performed at the stage.

  In this way, the driver can automatically listen to the summary of the absence recording. If necessary, the stored telephone number is called back (step S650).

  In this way, in the automobile hands-free telephone device of the fourth embodiment, when a telephone call is received with the mobile phone set in the telephone holder 11 of the automobile, the incoming call is not made to the HUD 60 without ringing. If there is no incoming call response after a certain period of time, the process automatically proceeds to the absence recording process. In the absence recording process, after digital recording, only the display with absence recording is performed. If the driver notices the message that there is an absence recording and performs the playback operation, the recorded message can be automatically summarized to the driver so that the driver can listen to the message. You will be able to drive safely without being taken away.

  In the above-described embodiment, the icon indicating the incoming call and the telephone number of the incoming call are described as being projected on the windshield 62 using the HUD 60. However, the HUD 60 is provided as a retrofit. It goes without saying.

The block diagram which shows the structure of the 1st Embodiment of this invention. The flowchart of the telephone call incoming process by said embodiment. Explanatory drawing which shows the position of the telephone call display by said embodiment. The block diagram which shows the structure of the 2nd Embodiment of this invention. The flowchart of the telephone call incoming process by said embodiment. The block diagram which shows the structure of the 3rd Embodiment of this invention. The flowchart of the telephone call incoming process by said embodiment. The flowchart of the recording / reproducing function in the 4th Embodiment of this invention. The flowchart of the telephone call incoming process by said embodiment. Explanatory drawing (perspective view) which shows the method of determining A zone and B zone on a windshield. Explanatory drawing (side view) which shows the method to determine A zone and B zone on a windshield. Explanatory drawing which shows A zone and B zone on a windshield. Explanatory drawing which shows the visual field on a windshield. Explanatory drawing which shows the center viewing area and peripheral viewing area in the visual field on a windshield.

Explanation of symbols

10 Mobile telephone 11 Telephone holder 20 Controller 30 Input button 40 Microphone 50 Speaker 60 HUD
63 Central viewing area 64 Peripheral viewing area 67 Incoming icon 110 Vehicle speed sensor 140 Brake actuator 150 Throttle actuator 160 Laser radar 170 Brake switch

Claims (5)

Communication control means for controlling the mobile telephone;
Display means for displaying various information;
A microphone and speaker for hands-free calling;
An inter-vehicle distance follow-up control means that follows the inter-vehicle distance with respect to the preceding vehicle while keeping the inter-vehicle distance at the reference inter-vehicle distance;
Operation input means,
The communication control means does not sound a ringing tone when an incoming call of the mobile phone is detected, and causes the display means to display a notification of the incoming call,
After that, when there is an input from the operation input means within a certain time, a call line is established to enable a hands-free call by the microphone and the speaker, and if tracking control by the inter-vehicle distance tracking control means is in progress, An automobile hands-free telephone device characterized in that the inter-vehicle distance tracking control is continued by resetting the reference inter-vehicle distance with respect to the preceding vehicle to a value longer than the normal reference inter-vehicle distance. The communication control means does not sound a ringing tone when an incoming call of the mobile phone is detected, and causes the display means to display a notification of the incoming call,
After that, if there is an input from the operation input means within a certain time, a call line is established to enable a hands-free call using the microphone and speaker, and tracking control by the inter-vehicle distance tracking control means is not performed. 2. The automobile hands-free telephone device according to claim 1, wherein a reference inter-vehicle distance with respect to the preceding vehicle is set to a value longer than a normal reference inter-vehicle distance to automatically shift to inter-vehicle distance tracking control. Communication control means for controlling the mobile telephone;
Display means for displaying various information;
A microphone and speaker for hands-free calling;
Braking / driving force control means for controlling the braking / driving force of the vehicle so that the inter-vehicle distance with respect to the preceding vehicle matches the reference inter-vehicle distance according to the vehicle speed;
Operation input means,
The communication control means does not sound a ringing tone when an incoming call of the mobile telephone is detected, causes the display means to display a notification of the incoming call, and then receives an input from the operation input means within a predetermined time. A hand-free call using a microphone and a speaker is established, and a braking force is applied when the inter-vehicle distance to the preceding vehicle is shorter than the reference inter-vehicle distance. Telephone device. Brake pedal operation detection means for detecting whether the brake pedal has been operated,
The communication control means does not sound a ringing tone when an incoming call of a mobile telephone fixed to the telephone holder is detected, and causes the display means to display a notification of the incoming call, and then the operation input within a predetermined time. When there is an input from the means, a call line is established to enable a hands-free call using the microphone and the speaker, and the first braking force is applied when the inter-vehicle distance to the preceding vehicle is shorter than the reference inter-vehicle distance. 4. The automobile according to claim 3, wherein a second braking force larger than the first braking force is applied when an operation of the brake pedal by the brake pedal operation detecting means is not detected within a predetermined time thereafter. Hand-free telephone device.   The automobile hands-free telephone device according to any one of claims 1 to 4, wherein the display means is a head-up display.

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