JP2007008289A - On-vehicle audio/video system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle audio/video system capable of providing information on a source which has entertained a user without any setting operation, when the user moves to other seat. <P>SOLUTION: The on-vehicle audio/video system comprises: a plurality of information display means for each seat in a vehicle compartment; a plurality of headphones connected with each information display means to be operable and having ID information uniquely identifying itself; a management table coordinating the source, which entertained or has entertained the user with headphone, with the corresponding headphone ID information; and a control means. When receiving ID information from either of the seats (S5), the control means refers to the management table to identify the source from the received ID information (S7), and then switches the video/audio to identified one to output it to the information display means and the headphone of the seat. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an in-vehicle audio / video (A / V) system, and in particular, audio (audio) information output from a CD player, a radio receiver or the like to a user in a rear seat in a vehicle interior, a DVD player, The present invention relates to an in-vehicle A / V system that provides various entertainment such as video (video) information output from a TV receiver or the like. Such a system is also referred to as a rear entertainment system (RES) or rear seat entertainment (RSE).

  The above-mentioned RES (or RSE) is generally provided for high-end large vehicles, and this system is used by a user on the rear seat to perform operations such as A / V source selection and volume adjustment. An operation unit, headphones for listening to audio corresponding to the audio signal output from the selected source, and a display for displaying video corresponding to the video signal output from the source are also provided. As the form of the operation unit, there may be used an “operation panel” that is fixedly provided in the vicinity of the seat where the user is seated, one for each seat, or one that is shared by a plurality of users. However, a remote controller (remote controller) is often used to improve operability. In addition, as a form of headphones, there is a type in which a jack is connected to a terminal provided on the front panel of the operation unit, but in many cases, a “wireless” type is considered in consideration of user convenience. Headphones are used. In particular, wireless headphones tend to be used as the number of seats increases in higher-grade large vehicles. Unless otherwise defined in the following description, the term “headphones” simply refers to wireless headphones.

  In such an in-vehicle A / V system, a user at the rear seat operates the operation unit to select and select which source of audio / video information is to be output to the headphones / display, and is output to the headphones / display. By giving an operation instruction (seek up / down, volume adjustment, etc.) to the source related to the audio / video information, the operating state of the source selected or changed based on the instruction is heard through the headphones. Displayed through the display screen. The front side is equipped with an operation unit, a display, and the like as with the rear side, but differs in that audio information is output via a speaker installed at a predetermined position in the vehicle interior instead of using headphones. . In this case, the operating state of the source given the selection / operation instruction from the operation unit on the front side is heard through the speaker and displayed through the display screen.

  As described above, in the conventional rear entertainment system (RES) or rear seat entertainment (RSE), a user on the rear seat can select a desired A / V source through a dedicated headphone / display. Information can be viewed and listened to, but for this purpose, as described above, it is necessary to operate the operation unit by itself to perform a setting operation related to selection of a desired source, operation thereof, and the like. The setting operation and the enjoyment of the output information of the selected source based on the setting operation are effective only while the user is using the dedicated headphones / display in the seat.

  For this reason, even if the user at the rear seat has once performed the setting operation and enjoyed the information of the desired source, the information of the source that has been enjoyed until now after moving to another rear seat by getting on and off the car etc. In order to enjoy it, it has been necessary to operate a dedicated operation unit again in the seat after the movement to perform a setting operation related to the selection of the source. Such a situation may occur in addition to getting on and off the vehicle, for example, when moving in a vehicle compartment while a large vehicle such as a mini-van or SUV is commonly used with a “Walk Through” structure is running.

As a technique related to the above-described in-vehicle A / V system, for example, as described in Patent Document 1, in an in-vehicle acoustic device, a display pattern corresponding to a seat position in a vehicle selected by an operation unit There is one that displays data on a display unit and adjusts a signal level and a delay time of an audio signal output from a speaker disposed in a vehicle corresponding to the seat position by a signal processing circuit.
Japanese Patent Laid-Open No. 10-32898

  As described above, in the conventional in-vehicle A / V system, the user at the rear seat operates the operation unit to perform a desired setting operation, thereby obtaining the desired A / V source information and the other rear seat user. Regardless of whether the same A / V source is selected, there is an advantage that it can be viewed and listened through a dedicated headphone / display.

  However, the setting operation and the enjoyment of the source information based on the setting operation were effective only while the user was using the dedicated headphone / display at the rear seat. When enjoying the situation (such as moving in the cabin of a large vehicle, getting in and out of a car, etc.) that involves moving the rear seat where you are seated, information on the source that you have enjoyed so far In order to enjoy this, there is a disadvantage that the setting operation must be performed again.

  The present invention has been created in view of the problems in the prior art, and it is possible to enjoy in-vehicle audio / video that can enjoy the information of the source that has been enjoyed so far without performing the setting operation even when the seat is moved. The purpose is to provide a system.

  In order to solve the above-described problems of the prior art, an on-vehicle audio / video (A / V) system according to the present invention is provided corresponding to each seat in a vehicle interior, and relates to the operating state of each selected source. A plurality of information display means for displaying video information and operably connected to each of the plurality of information display means, each having ID information for uniquely identifying itself, and audio relating to the operating state of each selected source A plurality of headphones that output information; a memory unit that stores a management table in which a user wearing any of the headphones enjoys or enjoys a source and ID information of the headphones; and the information display unit And control means operatively connected to the memory means, wherein the control means has received headphone ID information from any of the seats In reference to the management table, from the received ID information, the source that the user seated on the seat enjoyed before moving the seat is identified, and the information display means and headphones corresponding to the seat are identified. , Switching to the specified source video / audio and outputting.

  According to the in-vehicle A / V system according to the present invention, the headphone operably connected to the information display means provided for each seat is provided with ID information for uniquely identifying the headphone. The management table which matched the source | sauce which the user who mounted | worn with the headphone enjoyed or enjoyed and ID information of the said headphone was matched. Thus, for example, when a user at the rear seat has once performed a setting operation and enjoyed video / audio information of a desired source, even if the user has moved to another rear seat, the control means can By referring to the management table from the ID information received at the seat (rear seat), it is possible to identify the source that the user seated on the rear seat enjoyed before moving the seat, and based on this result, the source The video / audio can be switched and output.

  In other words, once you have performed the setting operation and enjoyed the information of the desired source, when you move to another seat, you do not have to perform the setting operation again on the seat after the movement, but the function of the control means It becomes possible to continue to enjoy the information of the source that was enjoyed until. This contributes to improvement of user merit.

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

  FIG. 1 schematically shows the configuration of an in-vehicle audio / video (A / V) system according to an embodiment of the present invention.

  The in-vehicle A / V system 50 according to the present embodiment is for various A / V sources (in the illustrated example, a radio receiver 1, a CD player 2, a DVD player 3, a TV receiver 4, and a navigation unit 5). Front seat passenger unit (head unit (H / U)) 10 for front seat passengers to perform various setting operations such as source selection, volume and sound quality adjustment, and A / V source (navigation unit 5) A rear seat operation unit 20, a front seat display unit 15, an amplifier unit 16, a speaker 17, and a rear seat display unit 30. The wireless headphones 40 are configured. The sources 1 to 5, the front seat operation unit 10, the display units 15 and 30, and the amplifier unit 16 are connected to each other via a bus 6 such as an optical fiber provided as a transmission path.

  In the example shown in the figure, only one speaker 17 is shown. However, in practice, when a predetermined number of speakers 17 are arranged in a predetermined position in the passenger compartment, for example, when there are three rear seats, at least left and right of each rear seat. A total of eight speakers 17 are installed, two in the vicinity and two in the vicinity of the left and right of the front seat. Similarly, only one unit (one) is shown for the operation unit 20, the display unit 30 and the wireless headphones 40 for the rear seat, but in actuality, the required number according to the number of passengers in the rear seat, For example, in the case of three rows of rear seats, two (two) each for the left and right passengers of each rear seat, a total of six (six) operation units 20, display units 30, and wireless headphones 40. Are provided.

  The front seat operation unit (H / U) 10 is installed in the form of an “operation panel” in the middle of the center console so that the driver and the passenger in the front passenger seat can share the display unit. 15 is arranged above the operation panel (H / U). The display unit 15 has an LCD monitor or the like for displaying video information output from a video source such as the DVD player 3 or the TV receiver 4 on a display screen, and the display screen is displayed as necessary. A drive mechanism is also provided that rotates the front seat in the direction of each passenger.

  On the other hand, the rear seat operation unit 20 is provided in the form of a “remote control” so that a passenger in the rear seat can easily operate, and is connected to the corresponding rear seat display unit 30 by infrared communication. . The rear seat display unit 30 is installed in the rear part of the headrest of the front seat, and has an LCD monitor or the like for displaying video information on the display screen in the same manner as the front display unit 15. The internal configuration of the rear seat display unit 30 will be described later. The display unit 30 is communicably connected to the corresponding wireless headphones 40. In this embodiment, infrared communication and RF communication are used together as communication forms. The internal configuration of the wireless headphones 40 will also be described later. In the present embodiment, the rear seat display unit 30 is installed on the headrest of the front seat. However, the installation location is not limited to this.

  As a basic operation, each of the sources 1 to 5 uses the display unit 30 by infrared communication from the data related to the operation instruction sent from the front seat operation unit 10 to the bus 6 or from the rear seat operation unit (remote control) 20. The data related to the operation instruction sent to the bus 6 is received, the own operation state is set or changed based on the data related to the operation instruction, and the data indicating the result (current operation state) is audio. / Send to bus 6 as video signal. For example, in the case of the radio receiver 1, in response to an operation instruction given from the operation units 10 and 20, an FM signal or an AM broadcast signal is received and demodulated to generate an audio signal, which is converted into a digital audio signal. The data is converted and sent to the bus 6. In the case of the DVD player 3, in response to an operation instruction given from the operation units 10 and 20, a signal recorded on the recording surface of the DVD selected by the user is read and the reproduced video data is sent to the bus 6. To do.

  The front seat operation unit (H / U) 10 includes a control unit 11, an operation unit 12, a display unit 13, and a memory unit 14. Among these, the operation unit 12 selects various operation keys for performing various setting operations on the sources 1 to 5, for example, a power key for performing power on / off and volume adjustment, and selecting each source. Source selection keys, numeric keys, preset keys for performing certain functions, shift keys with arrows (instructing operations such as FF / REW operation, seek up / down operation by operating the arrow part) Etc.). The display unit 13 is arranged in the form of an LCD or the like on the operation panel (H / U 10). Based on data output from the control unit 11, various information, for example, FM / AM for the radio receiver 1 is used. For the CD player 2, the disc number and playback position (number of tracks, elapsed time, etc.) during the CD performance are displayed.

  The memory unit 14 is instructed to turn off the power in the front seat operation unit (H / U) 10, and the audio / video at the time when the output operation of the audio / video signal from the selected source is stopped. Data indicating the acquisition state of (A / V) information (referred to as “A / V acquisition state data” for convenience) is stored. This A / V acquisition state data is stored for reference when necessary at the next power-on. In this A / V acquisition state data, for example, “source type” indicating which source was used, and for audio sources, the volume and sound quality adjustment values when listening to the sound are indicated “Volume / sound quality” to be performed, “detailed information by source” for instructing a detailed A / V acquisition state for each source, and the like. For example, if the radio receiver 1 is used, the source-specific detailed information includes FM / AM type, broadcast station (reception frequency) information, and the like.

  The control unit 11 controls the entire A / V system 50 according to the present embodiment. Basically, based on an operation instruction given through the operation unit 12, the control unit 11 passes through the bus 6 from the selected source. An operation for acquiring the sent A / V data and reproducing the A / V information, an operation for displaying information instructing an operation state and an operation state on the display unit 13, and an operation for storing the A / V acquisition state data And control of reading operation. In this case, the acquired audio data is sent to the amplifier unit 16 via the bus 6 by the control unit 11, and is appropriately D / A converted, and the volume and sound quality are controlled and amplified, and then the speaker. The sound is output through 17. The acquired video data is sent to the front seat display unit 15 by the control unit 11 via the bus 6 and displayed as video information on the display screen.

  On the other hand, the rear seat operation unit (remote control) 20 is not particularly shown, but has an operation unit having the same configuration and function as the front-side operation unit 12 and a signal corresponding to an operation instruction input from the operation unit. Is transmitted to the display unit 30 by infrared communication.

  Next, the internal configuration of the rear seat display unit 30 will be described.

  FIG. 2 shows an example of the configuration. As shown in the figure, the rear seat display unit 30 includes a control unit 31 constituted by a microcomputer, a infrared communication unit 32, an LCD monitor, and the like. A display unit 33, a display driver 34, an RF transmission unit 35, an antenna 35 a, and a memory unit 36. Among these, the display unit 33 performs display control via the display driver 34 based on the control from the control unit 31 and, like the front display unit 15, video sources such as the DVD player 3 and the TV receiver 4. The video data (information) acquired from the computer via the bus 6 is displayed on the display screen. Based on the control from the control unit 31, the RF transmission unit 35 RF-transmits audio data acquired from each of the sources 1 to 4 via the bus 6 to the wireless headphones 40 as an audio signal AD via the antenna 35a. It is.

  Similarly to the front-side memory unit 14, the memory unit 36 is instructed to turn off the power in the corresponding rear seat operation unit (remote control) 20, and outputs audio / video signals from the selected source. The data (A / V acquisition state data) indicating the acquisition state of the audio / video information at the time when is stopped is stored. Further, the memory unit 36 has a one-to-one correspondence between the source that the user at each rear seat has enjoyed or enjoyed and the ID information of the wireless headphones 40 that have been used or used to enjoy the information of the source. The “management table” associated with is stored. This management table is created by the control unit 31, and is referenced and updated by the control unit 31 as necessary. The contents of the management table are managed so as to always match the contents of the management tables held in the other rear seat display units 30.

  The infrared communication unit 32 has a configuration equivalent to that generally used as an interface of a personal computer (PC). Basically, data to be transmitted (in this embodiment, the control unit 31). Encoder that performs predetermined modulation on the data (supplied from the data), an infrared light emitting unit that converts the encoded data into infrared rays and radiates it outside, and converts infrared rays input from the outside into data An infrared light receiving unit that performs the predetermined demodulation on the converted data, and a decoder that decodes the converted data. The infrared light emitting unit and the infrared light receiving unit are integrated into a module.

  Although not shown, the infrared communication unit 32 is provided near the lower end of the front panel of the rear seat display unit 30, and the light emitting unit and the light receiving unit are disposed toward the rear seat. And the infrared radiation distance radiated | emitted from a light emission part is set so that it may become a predetermined distance. The predetermined distance is set to a distance to the user when the user is seated on the rear seat, and is set to a distance of about 40 to 50 cm, for example. Thus, when infrared IR is emitted from the light emitting unit toward the rear seat at regular intervals, the infrared IR is reflected by the user's body if the user is seated on the rear seat, and infrared IR if the user is not present. Is not reflected, it is possible to recognize whether or not the user is seated in the rear seat by detecting the presence or absence of reflection of the infrared IR by the light receiving unit.

  Alternatively, as will be described later, the presence or absence of an infrared ID including ID information emitted from the wireless headphones 40 at regular intervals is detected by the light receiving unit so as to recognize whether or not the user is seated in the rear seat. It may be.

  The control unit 31 basically performs the same control as the front-side control unit 11. That is, an operation for acquiring A / V data sent from the selected source via the bus 6 based on an operation instruction given from the remote controller 20 via the infrared communication unit 32 and reproducing A / V information; Control is performed such as an operation for displaying information instructing an operation state, an operation state, and the like on the display unit 33, an A / V acquisition state data storage operation, and a read operation. In this case, the acquired audio data is RF-transmitted by the control unit 31 to the wireless headphones 40 via the RF transmission unit 35 and the antenna 35a, and is appropriately D / A converted in the headphones 40, and the volume and the like are adjusted. After that, sound is output through the headphone speaker. The acquired video data is sent to the display unit 33 by the control unit 31 via the display driver 34, and is displayed as video information on the display screen.

  Further, the control unit 31 detects, as will be described later, the movement of the user of the rear seat (that is, the detection of which rear seat the user is seated after) and the video / audio based thereon as processing related to the present invention. Performs output switching control. When this video / audio output switching control is performed, the management table stored in the memory unit 36 is referred to.

  Next, the internal configuration of the wireless headphones 40 will be described.

  FIG. 3 shows an example of the configuration. As shown in the figure, the wireless headphones 40 include a control unit 41, an infrared communication unit 42, and a volume operation unit 43 for manually adjusting the volume of output audio. A register 44, an antenna 45a and an RF receiver 45 for receiving an audio signal AD, a digital signal processor (DSP) 46, and left and right headphone speakers 47L and 47R. Of these, the RF receiver 45 selects one of the received frequencies of the audio signal AD received via the antenna 45a based on the control from the controller 41, and performs intermediate frequency amplification or the like. Processing is performed and output to the DSP 46. The DSP 46 separates the input audio signal into the left (L) audio output and the right (R) audio output based on the control from the control unit 41, appropriately performs delay processing, etc. It converts and outputs to each headphone speaker 47L, 47R.

  The register 44 stores encoded ID information for uniquely identifying the headphones 40, and the ID information can be changed based on an external input setting as necessary. It is like that. In this case, the input setting from the outside is performed by infrared communication from the corresponding remote controller 20 via the display unit 30 (infrared communication unit 32), and further via the infrared communication unit 42 and the control unit 41.

  The configuration of the infrared communication unit 42 is basically the same as the configuration of the infrared communication unit 32 built in the rear seat display unit 30, and a description thereof will be omitted. For example, when detecting the infrared IR emitted from the display unit 30 side, the infrared communication unit 42 radiates the ID information read from the register 44 on the infrared output based on the control from the control unit 41. (Infrared ID including ID information). Alternatively, when the user wearing the headphones 40 is seated on the rear seat, the infrared ID may be emitted toward the display unit 30 at regular intervals based on the control from the control unit 41.

  Therefore, when the user wearing the headphone 40 is seated in the rear seat, the infrared ID emitted in response to the infrared IR from the display unit 30 side or the infrared ID spontaneously radiated is stored in the display unit 30. It is detected by the infrared communication unit 32 (light receiving unit). As a result, the control unit 31 of the display unit 30 refers to the management table stored in the memory unit 36, and the user is identified from the ID information of the headphones 40 worn by the user seated on the rear seat. The source enjoyed before the seat movement is specified, and video / audio output switching control is performed based on the result.

  In the in-vehicle A / V system 50 configured as described above, the display unit 33 of the rear seat display unit 30 is used as the “information display means”, the memory unit 36 of the rear seat display unit 30 or the front seat operation unit. The memory unit 10 corresponds to the “memory unit”, and the control unit 31 of the rear seat display unit 30 or the control unit 11 of the front seat operation unit 10 corresponds to the “control unit”.

  In the in-vehicle A / V system 50 according to the present embodiment, as will be described later, when the user at the rear seat once performs setting operation and enjoys (or enjoys) information of a desired source, When moving to another rear seat, the video / audio of the source that has been enjoyed up to now is automatically displayed without changing the setting operation again in the seat after the movement, and the display unit 30 (LCD monitor, etc.) It can be enjoyed through the wireless headphones 40.

  FIG. 4 shows an example of a screen display related to automatic switching of the source output accompanying the seat movement of the rear seat user. In the illustrated example, the user wearing the wireless headphones 40 is first seated in the left seat of the rear seat, and the corresponding display screen 30a (display) displays the DVD image selected based on the setting operation from the corresponding remote controller. When viewed in the unit 30) (see FIG. 4 (a)), when moving to another rear seat (right seat) by getting on and off the vehicle or moving in the vehicle interior (see FIG. 4 (b)), In the seat after the movement, it is shown that the video of the DVD that has been viewed so far is continuously viewed on the corresponding display screen 30b (display unit 30).

  Hereinafter, with reference to FIG. 5 showing an example of a processing flow of processing related to detection of the seat movement of the user at the rear seat and switching of video / audio output based on the seat movement performed in the in-vehicle A / V system 50 according to the present embodiment. While explaining.

  In this processing flow, for the sake of convenience, any one rear seat display unit 30 will be mainly described. Further, as a precondition, the user of each rear seat has already performed the setting operation and has already enjoyed the information of the desired source, and the control table 31 of each display unit 30 has the same management table (ie, each rear table). The data that the source of the user of the seat enjoys and the ID information of the wireless headphones 40 used to enjoy the information of the source on a one-to-one basis are created, and each display unit 30 Assume that the data are stored in the memory unit 36, respectively.

  Under this precondition, in the first step S1, whether or not the ignition key is set to the ACC “ON” position by the control unit 31 in the display unit 30 (YES), that is, the present system 50 It is determined whether or not the power source is turned on. If the determination result is YES, the process proceeds to the next step S2, and if the determination result is NO, the process flow is “end”.

  In the next step S <b> 2, in the display unit 30, the control unit 31 determines whether or not the power is turned on (YES) or not (NO) based on the operation instruction from the corresponding remote controller 20. If the determination result is YES, the process proceeds to the next step S3, and if the determination result is NO, the process returns to step S1 and the above process is repeated.

  In the next step S3, the display unit 30 is watched by the control unit 31 in cooperation with the other control unit 31 of the display unit 30 in the “ON” state in the other “ON” display unit 30. It is determined whether the A / V source being changed has been changed (YES) or not (NO). If the determination result is YES, the process proceeds to the next step S4, and if the determination result is NO, the process proceeds to step S5.

  In step S4, another “ON” display among the management tables (data in which “source” information and “ID” information are associated with each other) stored in the memory unit 36 by the control unit 31 in the display unit 30 is displayed. Update the “source” information corresponding to the changed source in unit 30. That is, the contents of the management table are matched with the contents of the management table in the other display units 30.

  In the next step S5, the control unit 31 in the display unit 30 cooperates with the infrared communication unit 32 to receive an infrared ID including the ID information of any wireless headphones 40 (YES) or not (NO). Determine. If the determination result is YES, the process proceeds to the next step S6, and if the determination result is NO, the process returns to step S3 and the above processing is repeated.

  In the next step S6 (that is, when a user wearing headphones 40 is seated on the rear seat), the control unit 31 in the display unit 30 stores it in the memory unit 36 in the same manner as the process performed in step S4. In the management table, the “ID” information corresponding to the received ID information is linked with the “source” information and updated. That is, the contents of the management table are matched with the contents of the management table in the other display units 30.

  In the next step S7, the control unit 31 in the display unit 30 refers to the management table stored in the memory unit 36, and from the received ID information, the user seated in the rear seat enjoys the seat before moving. The specified source (“DVD” in the screen display example of FIG. 4) is specified.

  In the next step S8, the control unit 31 in the display unit 30 performs switching control to the specified source video / audio. That is, the control unit 31 refers to the “A / V acquisition state data” stored in the memory unit 36 and accesses the specified source (in this case, the DVD player 3) to acquire video / audio data. Then, the video of the source is displayed on the display screen of the display unit 33 via the display driver 34, and the sound of the source is output to the wireless headphones 40 via the RF transmission unit 35 (antenna 35a). Then, it returns to step S2 and repeats said process.

  As described above, according to the in-vehicle A / V system 10 according to the present embodiment, the headphones are inherently connected to the wireless headphones 40 that are operatively connected to the display unit 30 provided for each rear seat. A management table (memory unit 36) that has ID information to be identified and associates the A / V source that the user wearing the wireless headphones 40 enjoys or enjoys with the ID information of the headphones. I have. Therefore, even when the user at the rear seat has once performed the setting operation and enjoyed the video / audio information of the desired source, even when moving to another rear seat (see FIG. 4), the control unit 31 By referring to the management table from the ID information received at the rear seat after the movement, the source that the user seated on the rear seat enjoyed before the seat movement can be specified. Based on this result, switching control to the video / audio of the source is performed.

  As described above, according to the present embodiment, when the user at the rear seat has once performed the setting operation and enjoyed the information of the desired source, when the user moves to another rear seat, the rear seat at the moved rear seat Even if the setting operation is not performed again, it is possible to continue to enjoy the source information that has been enjoyed so far.

  In particular, when applied to a large vehicle such as Mini-van or SUV that can be easily moved in the vehicle interior, unlike the case of “getting on and off the car”, the user at the rear seat performs a setting operation once to select a desired source. Since the time from the time immediately before moving to another rear seat to the time immediately after moving is extremely short while enjoying the information, the video / audio of the source that has been enjoyed until now is substantially In this respect, it greatly contributes to the improvement of user merit.

  In the above-described embodiment, each rear seat display unit 30 has a management table having the same content, and each display unit 30 cooperates with each other to directly communicate with each other so that the user of the rear seat moves. The case where the video / audio output switching control of the accompanying source is performed has been described as an example. However, as apparent from the gist of the present invention (switching the video / audio output in accordance with the user's seat movement), the source output Of course, the form of the switching control is not limited to this. For example, instead of having each rear seat display unit 30 hold a management table, the management table is held only by the H / U 10 (memory unit 14), and each rear seat display unit 30 is comprehensively arranged from the H / U 10 side. It is also possible to control the switching of the source video / audio output for each display unit 30 by managing them.

  In the above-described embodiment, the case where the wireless headphone 40 is provided for the rear seat has been described as an example. However, the headphone is not limited to the “wireless” type, and the headphone with a jack is used. Even when used, the present invention can be similarly applied. In this case, the internal configuration of the headphones is basically the same as that shown in FIG. 3, and is different in that the headphones are wiredly connected to the corresponding display units 30 via jacks.

1 is a block diagram schematically showing the configuration of an in-vehicle audio / video (A / V) system according to an embodiment of the present invention. It is a block diagram which shows the internal structure of the display unit for rear seats in FIG. It is a block diagram which shows the internal structure of the wireless headphones in FIG. It is a figure which shows an example of the screen display which concerns on the automatic switching of the source output accompanying the seat movement of the user of a rear seat. It is a flowchart which shows an example of the process which concerns on the detection of the seat movement of the user of the rear seat performed in the vehicle-mounted A / V system of FIG. 1, and the video / audio output switching based on it.

Explanation of symbols

1-5 ... A / V source,
6 ... bus (transmission path),
10 ... Front seat operation unit (H / U),
11, 31 ... control unit (control means),
12 ... operation part,
14, 36... Memory part (memory means),
15 ... Front seat display unit,
17 ... Speaker,
20 ... Rear seat operation unit (remote control),
30: Rear seat display unit,
30a, 30b ... display screen,
32, 42 ... infrared communication part,
33. Display section (information display means),
35 ... RF transmitter,
40 ... Wireless headphones,
44... (For storing ID information) register,
45 ... RF receiver,
50. In-vehicle audio / video (A / V) system,
AD ... Audio signal,
ID: Infrared including ID information,
IR: Infrared.

Claims (6)

A plurality of information display means provided corresponding to each seat in the passenger compartment and displaying video information relating to the operating state of each selected source;
A plurality of headphones operatively connected to each of the plurality of information display means, each having ID information for uniquely identifying itself, and outputting audio information relating to the operating state of each selected source;
Memory means for storing a management table in which a user wearing any headphones enjoys or enjoys a source and ID information of the headphones,
Control means operably connected to the information display means and the memory means,
When the control means receives the headphone ID information from any of the seats, the control means refers to the management table, and the user seated on the seat enjoys the received seat from the received ID information. An in-vehicle audio / video system characterized in that a source is specified, and information display means and headphones corresponding to the seat are switched to video / audio of the specified source and output. Further comprising infrared communication means operatively connected to the control means;
2. The control means, in cooperation with the infrared communication means, detects whether or not ID information of the headphones is received, and determines whether or not a user is seated on the seat. The in-vehicle audio / video system described in 1.   Each of the plurality of information display means is a display unit provided for a user at each rear seat in the vehicle interior, and each display unit includes the memory means and the control means, and is mutually connected via a transmission path. The in-vehicle audio / video system according to claim 1, wherein the in-vehicle audio / video system is connected to the vehicle.   The control means in each display unit has source information corresponding to the changed source in the data of the management table stored in the memory means when the source being viewed in another display unit is changed. The in-vehicle audio / video system according to claim 3, wherein the in-vehicle audio / video system is updated.   The control means in each of the display units has a management table stored in the memory means when receiving the headphone ID information from the rear seat when the source being viewed on the other display unit is changed. The in-vehicle audio / video system according to claim 3, wherein source information corresponding to the changed source in the data is updated by linking with the received ID information.   2. The in-vehicle audio / video system according to claim 1, wherein the control means is an operation unit provided for a user at a front seat in a vehicle interior, and the operation unit includes the memory means.

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