JP2007237850A - Display control device, and method and program for controlling display control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure visibility at the time of checking a rear side when a vehicle moves backward, and to allow a passenger in a rear seat to effectively and continuously enjoy pictures. <P>SOLUTION: A controlling portion 40 prohibits the display of the pictures corresponding to a television receiving signal in an on-vehicle display device during a period detecting the backward movement of the vehicle, and makes a recording portion 42 start recording by using starting of backward movement of the vehicle as a trigger. When the backward movement of the vehicle is not longer detected, the pictures are displayed on the on-vehicle display device 12 on the basis of the television receiving signal recorded on the recording portion 42. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display control device that performs display control of an in-vehicle display device, a control method for the display control device, and a control program, and more particularly to display control for an in-vehicle display device having an image recording device capable of recording a received television broadcast. Regarding technology.

  In recent years, a rear entertainment system in which a rear seat monitor is provided in addition to a front seat monitor in a vehicle so that passengers in the rear seat can enjoy images in the vehicle has begun to spread. In such a rear entertainment system, an image provided from a TV tuner, an in-vehicle DVD (Digital Versatile Disk) playback device, or a game machine is displayed on a rear seat monitor that is visually recognized by a passenger in the rear seat. It has been broken.

In the rear entertainment system as described above, when the surroundings of the vehicle are dark, such as at night, the brightness of the monitor is reduced compared to the daytime. This prevents the inside of the vehicle from becoming too bright from the outside due to the light at the time of the monitor display, and the visibility outside the vehicle is reduced. In addition, when the vehicle is retracted at night, etc., the display on the rear seat monitor is stopped, the brightness is further reduced, and the video displayed on the rear seat monitor is reflected on the rear seat side glass. In order to prevent such a situation, the rear confirmation is not hindered (see, for example, Patent Document 1).
JP 2003-327044 A

  However, the rear seat occupant may concentrate on the image displayed on the rear seat monitor regardless of the driving situation, so the display on the rear seat monitor stops and the brightness rapidly increases. If it falls into, it was supposed to cause a sense of incongruity. In particular, when a television broadcast is being displayed, if the display on the monitor suddenly stops, the video during that time cannot be enjoyed, resulting in dissatisfaction for viewers in the rear seats.

  It is an object of the present invention to ensure visibility in rearward confirmation when a vehicle moves backward, and to enable an occupant of a rear seat to enjoy video continuously and effectively even when the vehicle moves backward A display device, a display control device that controls the display device, a display control method, and a control program are provided.

In order to solve the above-described problem, a display control device that controls an in-vehicle display device that receives a television reception signal and displays an image corresponding to a television broadcast, the recording unit recording the television reception signal, A control unit that prohibits display of an image corresponding to the television reception signal during a period in which the reverse of the vehicle is detected, and causes the recording unit to start the recording with the start of reverse of the vehicle as a trigger. It is characterized by that.
According to the above configuration, the control unit prohibits the display of the image corresponding to the television reception signal in the in-vehicle display device during the period in which the backward movement of the vehicle is detected, and the recording unit is triggered by the start of the backward movement of the vehicle. The recording is started.

In this case, when the backward movement of the vehicle is no longer detected, the control unit may display an image on the in-vehicle display device based on the television reception signal recorded in the recording unit.
In addition, when the backward movement of the vehicle is detected while displaying the image on the in-vehicle display device based on the television reception signal recorded in the recording unit, the control unit The display may be prohibited again.
And a brightness discriminating unit that discriminates the brightness of the surroundings of the vehicle, wherein the control unit prohibits the display and determines that the brightness of the surroundings of the vehicle is darker than a predetermined brightness. You may make it start the recording of the said recording part.

  Also, a control method of a display control device that includes a recording unit that records an input television reception signal, and controls an in-vehicle display device that displays an image corresponding to television broadcasting based on the television reception signal, Triggered by a reverse detection process for detecting the reverse of the vehicle, a display prohibition process for prohibiting display of an image corresponding to the television reception signal during a period in which the reverse of the vehicle is detected, and the start of reverse of the vehicle A recording start process in which the recording unit starts the recording.

  An in-vehicle display device that includes a recording unit that receives a vehicle reverse signal and a television reception signal and records the television reception signal, and that displays an image corresponding to the television broadcast based on the television reception signal. A control program for controlling a display control device to be controlled by a computer, wherein a reverse of the vehicle is detected, and display of an image corresponding to the television reception signal is prohibited during a period in which the reverse of the vehicle is detected And the recording unit starts the recording by using the start of reverse of the vehicle as a trigger.

  ADVANTAGE OF THE INVENTION According to this invention, when the vehicle reverse | retreats, the visibility in back confirmation is ensured, and the passenger | crew of a rear seat can enjoy an image | video continuously effectively, even when there is a vehicle reverse.

Next, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of an in-vehicle video display system.
As shown in FIG. 1, the in-vehicle video display system 1 includes a plurality of display devices 11 and 12. In the present embodiment, a front seat display device 11 disposed on the front seat 101 side of the vehicle 100 and a rear seat display device 12 disposed on the rear seat 102 side are provided.
The front seat display device 11 is disposed on, for example, a console, a front panel, and the like, and is mainly viewed by a passenger in the front seat 101 of a driver seat or a passenger seat. On the other hand, the rear seat display device 12 is arranged to be suspended from a ceiling portion in a vehicle compartment via a support, or is arranged on the seat back portion of the front seat, the back of the headrest, or the like. Are mainly visible.
In addition, a speaker 21 is provided in the vehicle compartment in the door and the like so that audio can be enjoyed together with the video displayed on the respective display devices 11 and 12, and the audio can be heard as necessary. 22 can be heard through.

FIG. 2 is a functional block diagram of the in-vehicle video display system.
The in-vehicle video display system 1 includes a TV tuner 31, a disk playback device 32, a navigation device 33, in addition to the audio unit 20 including the front seat display device 11, the rear seat display device 12, the speaker 21, and the headphones 22. A radio tuner 34, an operation unit 35, and a display control device 40 are provided.
In the in-vehicle video display system 1 according to the present embodiment, the display control device 40 controls the size of the images displayed on the display devices 11 and 12 to mainly apply to the glass on the rear seat 102 side of the vehicle 100. The impact on visibility outside the vehicle when the driver confirms the back by reflecting the image is reduced.
The television tuner 31 includes an antenna 31 a and the like, acquires a video signal, an audio signal, and the like from a television broadcast wave received via the antenna 31 a and outputs the video signal and the audio signal to the display control device 40.
The disk playback device 32 reads out image signals, audio signals, and the like recorded on various recording media such as a DVD (Digital Versatile Disk) player and a hard disk device, and outputs them to the display control device 40.
The navigation device 33 includes a GPS (Global Positioning System) antenna 33a and the like, and is a device that performs route guidance to a destination based on the current position of the vehicle 100 detected based on GPS radio waves received via the GPS antenna 33a. Yes, an image signal such as map information accompanying the route guidance and an audio signal are output to the display control device 40.

The radio tuner 34 includes an antenna 34 a and the like, acquires an audio signal and the like from radio broadcast radio waves received via the antenna 34 a, and outputs the audio signal to the audio unit 20 via the display control device 40.
The operation unit 35 accepts various operations from the user. As an image signal source to be displayed on the front seat display device 11 and the rear seat display device 12, any one of the television tuner 31, the disc playback device 32, and the navigation device 33 is used. Various operation elements such as an operation button for selecting a radio button, an operation element for selecting the radio tuner 34 as an audio signal source, and an operation element for designating the luminance when displaying images on the display devices 11 and 12. have.
The audio unit 20 includes an amplifier 23 in addition to the speaker 21 and the rear seat headphones 22. The audio signals of various audio signal sources (TV tuner 31, disc playback device 32, navigation device 33, radio tuner 34) output from the display control device 40 are amplified by the amplifier 23 and output from the speaker 21, and the rear seat headphones 22 to output.

The front seat display device 11 and the rear seat display device 12 are each composed of a liquid crystal display or the like, and the same image can be displayed on the front seat display device 11 and the rear seat display device 12. Also, the front seat display device 11 displays an image for route guidance to the destination output from the navigation device 33, and the rear seat display device 12 is output from the TV tuner 31 or the disc playback device 32. It is also possible to display images such as movies recorded on television broadcasts or DVDs.
As shown in FIG. 2, the display control device 40 includes a control unit 41, a recording unit 42, an audio signal selection unit 43, a video signal selection unit 44, and image processing units 45 and 46 (signal processing units). When displaying an image on each of the display devices 11 and 12 described above, an image corresponding to an image signal output from an image signal source designated by the user via the operation unit 35 is displayed, and an image signal is displayed. This is a device that performs various controls related to the display of the display devices 11 and 12, such as controlling a region for displaying a corresponding image and controlling a position for displaying an image corresponding to an image signal.
The control unit 41 includes a CPU, RAM, ROM, and the like (not shown), reads various control programs stored in the ROM into the RAM, and centrally controls each unit of the display control device 40 using a part of the RAM as a work area. Various processes such as image display, image display inhibition, image recording reduction display processing, position adjustment processing, and luminance adjustment processing described later are executed.
As a functional configuration, the control unit 41 includes a brightness determination unit 41a, a retreat detection unit 41b, and a display control unit 41c.

The brightness determination unit 41a receives an illumination signal SI that is output when a small light (headlight) (not shown) of the vehicle 100 is turned on. As a result, the brightness around the vehicle 100 has a predetermined brightness. Whether or not it is brighter than this is discriminated. When the illumination signal SI is input, the brightness determination unit 41a determines that the periphery of the vehicle 100 is darker than the predetermined brightness, and outputs a brightness determination signal Sa to the display control unit 41c.
The reverse detection unit 41b receives the reverse signal SR when the gear of the vehicle 100 is set to the reverse position (reverse position). When the reverse signal SR is input, the reverse detection unit 41b detects the reverse of the vehicle 100, The backward detection signal Sb is output to the display control unit 41c.
When the brightness determination signal Sa is input from the brightness determination unit 41a and the reverse detection signal Sb is input from the reverse detection unit 41b, the display control unit 41c performs display prohibition processing for prohibiting display in the image processing unit 46. Various control signals such as display prohibition signals are output.
The recording unit 42 records various data such as an image signal and an audio signal received from the TV tuner 31 such as the image signal source connected to the display control device 40 and an image signal and an audio signal input from the audio signal source. It consists of a hard disk, a semiconductor memory, etc. When the control unit 41 outputs the brightness determination signal Sa from the brightness determination unit 41a and the reverse detection signal Sb from the reverse detection unit 41b, the recording unit 42 performs the above-described display prohibition process under the control of the control unit 41. Recording of image signals, audio signals, etc. received from the TV tuner 31 is started.

The audio signal selection unit 43 amplifies an audio signal output from a predetermined audio signal source with an amplifier in accordance with the audio signal selection signal input from the control unit 41 and outputs it to the speaker 21, or for the passenger in the rear seat 102 This is output to the headphones 22 as an audio output device. The audio signal selection unit 43 is set so that audio signals to be output to the speaker 21 and the headphones 22 can be selected independently.
The video signal selection unit 44 outputs an image signal output from a predetermined image signal source to a predetermined image processing unit 45 or 46 in accordance with the video signal selection signal input from the control unit 41, and the predetermined display device 11 or 12 displays an image corresponding to an image signal output from a predetermined image signal source. The video signal selection unit 44 is set so that image signals to be output to the front seat display device 11 and the rear seat display device 12 can be independently selected.
One of the image processing units 45 and 46 is provided as a front seat image processing unit 45 corresponding to the front seat display device 11. The other image processing unit 46 is provided corresponding to the rear seat display device 12 as the rear seat image processing unit 46. Both image processing units 45 and 46 perform various image processing on the image signal input from the video signal selection unit 44 based on the control signal input from the display control unit 41c.

Next, the operation of the embodiment will be described.
FIG. 3 is a processing flowchart of the embodiment.
First, the display control unit 41c of the control unit 41 determines whether or not a reverse of the vehicle is detected, that is, whether or not the reverse detection signal Sb is output by the reverse detection unit 41b (step S1).
If the reverse detection signal Sb is output in the determination in step S1 (step S1; Yes), the display control unit 41c determines whether the surroundings of the vehicle are dark, that is, the illumination detection signal is received by the brightness determination unit 41a. It is determined whether or not Sa is output (step S2).
In the determination of step S2, when the illumination detection signal Sa is output by the brightness determination unit 41a (step S2; Yes), the image displayed on the rear seat display device 12 is reflected on the glass on the rear seat side. In order to prevent this, control is performed to prohibit video display (step S13).

Next, the control unit 41 determines whether or not the video selected by the video signal selection unit 44 is a TV video input from the TV tuner 31 (step S4).
If it is determined in step S4 that the video selected by the video signal selection unit 44 is not a TV video input from the TV tuner 31 (step S4; No), the process ends.
When the video selected by the video signal selection unit 44 is a television video input from the TV tuner 31 in the determination in step S4, the control unit 41 controls the recording unit 42 to start from the TV tuner 31. A TV program recording process for recording the input TV image is performed (step S5).

Next, the control unit 41 determines whether or not the TV program is being reproduced simultaneously (step S6).
If it is determined in step S6 that the TV program is being reproduced simultaneously, the simultaneous reproduction is temporarily suspended (step S7), and the process proceeds to step S11.
If it is determined in step S6 that the television program is not being reproduced simultaneously, it is determined whether or not a mode other than the television reproduction has been switched (step S11).
If it is determined in step S11 that the operation mode is switched to a mode other than the television playback mode (step S11; Yes), the process ends.
If it is determined in step S11 that the operation mode remains the television playback mode (step S11; No), it is determined whether or not the apparatus power is turned off (step S12).
If the apparatus power supply is turned off in the determination in step S12 (step S12; Yes), the process ends.

If it is determined in step S12 that the apparatus power remains on, the process returns to step S1.
Here, assuming that the television program is being recorded and the vehicle is no longer detected, the process proceeds to step S8 in the determination of step S1.
That is, the control unit 43 determines whether or not the recording unit 42 is recording a television program (step S8).
In this case, since the television program is being recorded by the recording unit 42 (step S8; Yes), the video display of the rear seat display device 12 is turned on again (step S9). Program simultaneous playback processing is performed (step S10).
As a result, the television image from the time point when the image display is turned off in step S3 is displayed on the rear seat display device 12, and the current television image is continuously recorded by the recording unit 42 in parallel therewith.

Here, the display prohibition and simultaneous reproduction processing of the television image will be described more specifically.
FIG. 4 is a processing timing chart of the embodiment.
In this case, it is assumed that the apparatus power supply is in an on state in the initial state.
When both the reverse detection signal Sa and the brightness determination signal Sb are turned on at time t1, that is, when the display prohibition process is to be performed to prevent the reflection, the display is performed on the rear seat display device 12. In order to prevent the image or the like from being reflected on the glass on the rear seat side, the image display is prohibited and the television image recording process is started, and the recording unit 42 records the television image signal.

Next, at time t2, when the backward detection signal Sa is turned off (whether the brightness determination signal Sb is on or off), the recording unit 42 simultaneously records and reproduces the video signal. Thus, the simultaneous reproduction processing performed is started, and the recording signal A corresponding to the head portion of the recorded television video signal is reproduced and displayed on the rear seat display device 12.
At time t3, when both the backward detection signal Sa and the brightness determination signal Sb are turned on again, the simultaneous reproduction is once ended.
Next, when the backward detection signal Sa is turned off again at time t4, the recording unit 42 starts a simultaneous reproduction process in which the video signal is recorded and reproduced at the same time, and is recorded following the recording signal A. The recorded signal B is reproduced and displayed on the rear seat display device 12.
At time t5, when the apparatus power supply is turned off, recording in the recording unit 42 is stopped, reproduction of the recording signal B is stopped, and the process is ended.

As described above, according to the present embodiment, when the vehicle is retracted, there is a possibility that reflection on the rear glass of the display screen of the television broadcast may occur, which may affect the driver, that is, the vehicle If the surroundings are darker than the specified brightness, at least the rear seat side TV broadcast video display is prohibited, and the recorded TV broadcast video is not detected when the vehicle is no longer retracted. Is displayed.
Therefore, it is possible to prevent the image from being reflected on the glass on the rear seat 102 side of the vehicle 100 and to ensure the visibility at the time of rearward confirmation, and the user of the rear seat can also watch TV broadcasting without being interrupted effectively. This improves convenience.

The present invention is not limited to the embodiment described above, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
In the above description, the television broadcast display is prohibited only when the reverse of the vehicle is detected by the reverse signal SR and the illumination signal SI is input (it is estimated that the surroundings are dark). The TV broadcast is recorded, and the simultaneous playback process is performed after the end of the reverse movement. However, the same process is performed when the reverse of the vehicle is detected without determining the input of the illumination signal. It is also possible.

In the above embodiment, the reverse detection unit 41b is described as detecting the reverse of the vehicle 100 when the reverse signal SR is input from the vehicle 100. However, the reverse detection of the vehicle 100 is detected. It is not limited to this. For example, a change in the moving direction of the vehicle 100 may be detected based on position information or the like in the navigation device 33, and the backward movement of the vehicle 100 may be determined.
In addition, the brightness determination unit 41a is configured to determine that the brightness around the vehicle 100 is darker than the predetermined brightness when the illumination signal SI is input from the vehicle 100. It is also possible to directly detect ambient brightness.

It is a schematic diagram which shows the structural example of the vehicle-mounted image display system to which the display control apparatus of embodiment is applied. It is a block diagram which shows the functional structure of the vehicle-mounted video display system of embodiment. It is a processing flowchart of an embodiment. It is a processing timing chart of an embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle-mounted image display system 11, 12 Display apparatus 40 Display control apparatus 41 Control part 41a Brightness discrimination | determination part 41b Retreat | reverse detection part 41c Display control part 42 Recording part 44 Video signal selection part 45, 46 Image processing part

Claims (6)

A display control device that controls a vehicle-mounted display device that receives a television reception signal and displays an image corresponding to a television broadcast,
A recording unit for recording the television reception signal;
A control unit that prohibits display of an image corresponding to the television reception signal during a period in which the vehicle is moving backward, and that causes the recording unit to start the recording using the vehicle backward start as a trigger;
A display control apparatus comprising: The display control device according to claim 1,
When the backward movement of the vehicle is no longer detected, the control unit displays an image on the in-vehicle display device based on the television reception signal recorded in the recording unit. The display control device according to claim 1,
The control unit displays the image when the backward movement of the vehicle is detected while displaying the image on the in-vehicle display device based on the television reception signal recorded in the recording unit. A display control device which is prohibited again. The display control device according to any one of claims 1 to 3,
A brightness discriminating unit for discriminating brightness around the vehicle;
The control unit, when it is determined that the brightness around the vehicle is darker than a predetermined brightness, prohibiting the display and starting recording of the recording unit;
A display control device. A control method for a display control device that includes a recording unit that records an input television reception signal and controls an in-vehicle display device that displays an image corresponding to television broadcasting based on the television reception signal,
A reverse detection process for detecting the reverse of the vehicle;
A display prohibition process for prohibiting display of an image corresponding to the television reception signal during a period in which the vehicle is moving backward;
A recording start process in which the recording unit starts the recording with a start of reverse of the vehicle as a trigger;
A display control device control method comprising: A vehicle reverse signal and a television reception signal are input, and a recording unit that records the television reception signal is provided, and an in-vehicle display device that displays an image corresponding to the television broadcast is controlled based on the television reception signal. A control program for controlling a display control device by a computer,
Detecting the reverse of the vehicle,
During the period in which the vehicle has been detected to reverse, the display of the image corresponding to the television reception signal is prohibited,
Causing the recording unit to start the recording with the start of reverse of the vehicle as a trigger;
A control program characterized by that.

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