JP2008254680A - Vehicular display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To further effectively display a picture. <P>SOLUTION: The picture (for example, WELCOME) is displayed on a seat (S108) by irradiating the picture light into a cabin by a projector 10, when determining that an occupant does not stay in the cabin (determining as YES in S102), by determining whether or not the occupant stays in the cabin (S102). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device for a vehicle that displays an image by irradiating a vehicle interior with image light generated by condensing light from a light source.

Conventionally, a keyboard placed on the ceiling of an automobile displays a keyboard image at the center of the handle, and the keyboard is placed by detecting which part of the keyboard image is touched using a CCD camera or the like. There is an input device that makes it possible to perform keyboard input without the need (see, for example, Patent Document 1).
JP 2004-262363 A

  However, in the case where an image is displayed by irradiating a part of the vehicle interior with a projector as in the apparatus described in Patent Document 1, it is not preferable for safety to irradiate the occupant with the image light. Therefore, in such an apparatus, there is a problem that a part where an image can be displayed is limited and the usability is not good.

  The present invention has been made in view of the above problems, and an object of the present invention is to enable more effective video display.

  The first feature of the present invention is an image light generation device that is disposed in a vehicle interior and generates image light by collecting light from a light source, and an occupant determination that determines whether an occupant is present in the vehicle interior And a display control means for causing the image light generating device to irradiate the image light into the vehicle interior and display an image when it is determined by the occupant determining means that no occupant is present in the vehicle interior.

  In such a configuration, when it is determined that no occupant is present in the vehicle interior, the image light is emitted from the image light generation device to the vehicle interior and the image is displayed, so the display location of the image is not limited, Video display can be performed more effectively.

  The second feature of the present invention is that the position where the image light is irradiated is a vehicle seat or a center console.

  Thus, the image can be displayed by irradiating the vehicle seat or the center console with the image light.

  Further, the third feature of the present invention is that the occupant determination means is provided in the vehicle interior based on whether or not the seat sensor detects whether or not the vehicle seat is seated. It is to determine whether an occupant exists.

  In this way, it is determined whether or not there is an occupant in the vehicle interior based on whether or not the seating sensor that detects the presence or absence of the seat in the vehicle interior detects the seating in the seat in the vehicle interior. it can.

  According to a fourth aspect of the present invention, there is provided photographing means for photographing the passenger compartment, and storage means for storing an image photographed by the photographing means in a state where no passenger is present in the passenger compartment. It is to determine whether there is an occupant in the vehicle interior by comparing the image taken by the photographing means with the image taken in the state where there is no occupant stored in the storage means. .

  In this way, there is an occupant in the vehicle interior by comparing the vehicle interior image captured by the imaging means for capturing the interior of the vehicle and the image stored in the storage means without the occupant in the vehicle interior. It can be determined whether or not.

  Further, the fifth feature of the present invention includes occupant occupancy estimation means for estimating that an occupant gets on the vehicle, and the display control means is estimated that the occupant gets on the vehicle by the occupant occupancy estimation means This is to stop the image light generation apparatus from irradiating the image light.

  In such a configuration, when it is estimated that the occupant gets on the vehicle, the irradiation of the image light is stopped, so that the occupant can be prevented from being irradiated with the image light.

  According to a sixth aspect of the present invention, there is provided elapsed time determination means for determining whether or not a predetermined reference time or more has elapsed since the passenger boarding estimation means estimated that the passenger boarded the vehicle. The display control means stops the image light generation device from irradiating the image light when it is determined that a predetermined reference time or more has elapsed since the elapsed time determination means estimated that the occupant got on the vehicle. It is to let you.

  If it is estimated that the occupant will get on the vehicle, if the image light irradiation is stopped immediately, the occupant may not be able to confirm the display contents, but the occupant may get on the vehicle. When it is determined that a predetermined reference time or more has elapsed since the estimation, the irradiation of the image light is stopped, so that it is possible to improve the visibility of the display content by the image light. It should be noted that it is desirable to set a reference time so that the occupant who gets into the vehicle is not irradiated with the image light.

  Further, the seventh feature of the present invention is that, when the occupant estimation means detects that the door of the vehicle is changed from the closed state to the open state by the door open / close state detecting means for detecting the open / closed state of the vehicle door. It is estimated that an occupant gets on the vehicle.

  As described above, when the door opening / closing state detecting means for detecting the opening / closing state of the vehicle door detects that the vehicle door has changed from the closed state to the open state, it can be estimated that the occupant gets on the vehicle. .

  Further, an eighth feature of the present invention is that the display control means displays the image by irradiating the image light generating device with the image light when the occupant determination means determines that there is an occupant in the vehicle compartment. It is to let you.

  In such a configuration, when it is determined that there is an occupant in the vehicle interior, the image light is emitted and the image is displayed avoiding the occupant, so that the image is displayed while preventing the image light from being irradiated to the occupant. Can do.

  Further, a ninth feature of the present invention is that the display control means displays the image so as to change.

  If the display area is uneven or if there is a pattern or pattern on the display area, the visibility of the image displayed on the display area will be poor, but the image will be displayed as it changes. Can be improved.

  In addition, the tenth feature of the present invention is that the display control means displays the image so as to change by periodically inverting the luminance of the image.

  As described above, the luminance of the video can be periodically reversed and displayed so that the video changes.

  According to an eleventh feature of the present invention, there is provided irradiation direction control means for changing the irradiation direction of the image light of the image light generation device, and the display control means irradiates the image light of the image light generation device to the irradiation direction control means. It is to move the display position of the video by changing the direction.

  In this way, the display position of the image can be moved by changing the irradiation direction of the image light of the image light generating device.

  A twelfth feature of the present invention is that the display control means displays a moving image on the image light generation device so that the image changes.

  In this way, a moving image can be displayed on the image light generating device so that the image changes.

  A thirteenth feature of the present invention is that there is an abnormal state in which the vehicle is not suitable for parking based on a parking estimation means for estimating whether or not the vehicle is parked and a signal input from a device mounted on the vehicle. An abnormal state determination means for determining whether or not there is no occupant in the passenger compartment by the occupant determination means, and it is estimated that the vehicle is parked by the parking estimation means, and the parking state determination means When it is determined that the vehicle is in an abnormal state, the display control unit causes the video light generation device to irradiate the image light into the vehicle interior to display a video indicating that the vehicle has an abnormal state that is not suitable for parking. is there.

  In such a configuration, when it is determined that no occupant is present in the passenger compartment, the vehicle is estimated to be parked, and it is determined that the vehicle is in an abnormal state, the vehicle indicates an abnormal state that is not suitable for parking. Since the video is displayed, the video can be displayed more effectively.

  According to a fourteenth feature of the present invention, the abnormal state determining means detects that at least some of the windows of the vehicle are open by the window open / closed state detecting means for detecting the open / closed state of the windows of the vehicle. If it is, it is determined that the vehicle has an abnormal state.

  Thus, when it is detected that at least some of the windows of the vehicle are open, it can be determined that the vehicle is in an abnormal state.

  According to a fifteenth feature of the present invention, at least some of the doors of the vehicle are in an open state or a half-door state by the door open / close state detection unit that detects the open / close state of the vehicle door. If this is detected, it is determined that the vehicle has an abnormal state.

  Thus, when it is detected that at least some of the doors of the vehicle are in an open state or a half-door state, it can be determined that the vehicle has an abnormal state.

  In addition, according to a sixteenth feature of the present invention, the abnormal state determination unit is configured such that the vehicle headlamp or the vehicle width lamp is lit by the lighting state detection unit that detects the lighting state of the vehicle headlamp or the vehicle width lamp. When it is detected that the vehicle has become, it is determined that the vehicle has an abnormal state.

  Thus, when it is detected that the headlamp or the vehicle width lamp of the vehicle is in a lighting state, it is determined that the vehicle has an abnormal state.

  According to a seventeenth feature of the present invention, the abnormal state determination means detects that the parking brake of the vehicle is off by the parking brake state detection means for detecting the on / off state of the parking brake of the vehicle. If it is, it is determined that the vehicle has an abnormal state.

  Thus, when it is detected that the parking brake of the vehicle is in an off state, it can be determined that the vehicle has an abnormal state.

  An eighteenth feature of the present invention is that the display control means displays an image so that the position of the abnormal state that is not suitable for parking in the vehicle can be specified.

  In such a configuration, the image is displayed so that the position of the abnormal state that is not suitable for parking in the vehicle can be specified, so that the occupant can easily recognize the position of the abnormal state that is not suitable for parking in the vehicle. it can.

  According to a nineteenth feature of the present invention, when it is determined by the occupant determination means that an occupant is present in the vehicle interior, the display control means displays the image by irradiating the image light while avoiding the seat in the vehicle interior. It is.

  As described above, when it is determined that there is an occupant in the vehicle interior, the image can be displayed by irradiating the image light while avoiding the seat in the vehicle interior.

  FIG. 1 shows a configuration of a vehicle display device according to an embodiment of the present invention. The vehicle display device 1 includes a laser projector 10, a drive mechanism 11, and a control unit 12. In addition, an engine start system 20 and a proximity sensor 21 are connected to the control unit 12.

  As shown in FIG. 2, the laser projector 10 is attached to a ceiling R at the left and right center of the vehicle interior, generates video light corresponding to a signal input from the control unit 12, and irradiates the vehicle interior. The laser projector 10 uses a laser diode as a light source, condenses light from the light source, and generates video light corresponding to a video signal input from the control unit 12.

  The drive mechanism 11 has a servo motor (not shown) for changing the irradiation direction of the image light of the laser projector 10, drives the servo motor in accordance with a signal input from the control unit 12, and the laser projector 10. The direction of image light irradiation is changed.

  As shown in FIG. 3, the display device 1 for a vehicle changes the irradiation direction of the image light of the laser projector 10 by the drive mechanism 11, and as shown in FIG. The display can be switched between the irradiation direction L2). Further, it is possible to display the message as if it is moving by changing the irradiation direction of the image light of the laser projector 10 little by little.

  Further, as shown in FIG. 4, a proximity sensor 21 is disposed as an engine start switch of the vehicle at an end portion on the upper surface of the center console C of the vehicle. The proximity sensor 21 detects the presence or absence of an object in a non-contact manner by detecting the level of reflected light that is reflected from the light emitted from the light emitting element and returned to the object.

  The control unit 12 in the present embodiment drives the drive mechanism 11 to display a message such as “WELCOME” on the seating surface (display position D1 in the drawing) of the driver's seat S, and the center console C For example, a message (START and arrow) indicating an engine start switch is displayed on the upper surface (display position D2 in the figure).

  The engine start system 20 performs an operation for starting the engine in accordance with an engine start signal sent from the control unit 12. An engine operation notification signal indicating whether or not the engine is operating is periodically notified from the engine start system 20 to the control unit 12.

  When the driver holds his / her hand over the proximity sensor 21 and a detection signal is input from the proximity sensor 21 to the control unit 12, an engine start signal is sent from the control unit 12 to the engine start system 20. In response to the engine start signal, the engine start system 20 performs an operation for starting the engine of the vehicle, so that the engine is started.

  The control part 12 is comprised as a computer provided with CPU, memory, I / O, etc., CPU implements various processes according to the program memorize | stored in memory.

  The control unit 12 receives an ignition switch signal (IGSW signal), a seating sensor signal, a door lock signal, a door open signal, a window open signal, a light signal, and a parking brake signal.

  The ignition switch signal (IGSW signal) is a signal input from the ignition switch of the vehicle and indicates the on / off state of the ignition switch.

  The seating sensor signal is a signal that is input from a seating sensor that is embedded in each seat in the passenger compartment and detects whether or not seated in each seat, and indicates the seating state of the occupant in each seat of the vehicle.

  The door lock signal is a signal input from the door ECU of the vehicle, and indicates a locked / unlocked state of each door for getting on and off the vehicle.

  The door open signal is a signal input from the vehicle door ECU, and indicates an open state, a closed state, and a half-door state of the door of the vehicle trunk room and each door for getting on and off.

  The window open signal is a signal input from the vehicle door ECU and indicates an open state and a closed state of the window glass provided at each door for getting on and off the vehicle.

  The light signal is a signal input from the light control switch of the vehicle, and indicates the on / off state of the headlamp and the on / off state of the vehicle width lamp.

  The parking brake signal is a signal input from the parking brake switch of the vehicle and indicates the on / off state of the parking brake.

  FIG. 5 shows a flowchart of the control unit 12. The vehicle display device 1 operates by receiving power from a vehicle battery power source. When receiving power from the vehicle battery, the control unit 12 starts the process shown in FIG. 5 regardless of the state of the ignition switch of the vehicle.

  First, in S100, it is determined whether or not the ignition switch of the vehicle is OFF based on the ignition switch signal.

  In S102, it is determined whether there is an occupant in the vehicle interior based on the seating sensor signal.

  In S104, it is determined based on the door lock signal whether the vehicle entrance / exit door has shifted from the locked state to the unlocked state.

  When the ignition switch of the vehicle is on, when there is an occupant in the passenger compartment, or when the door lock is not shifted from the locked state to the unlocked state, the determination in S100 is NO or the determination in S102 is YES or NO in S104, returns to S100.

  In addition, when the vehicle ignition switch is in an off state, no occupant is present in the vehicle interior, and the vehicle door lock is shifted from the locked state to the unlocked state, the determination of S100 is YES and the determination of S102 is The determination of NO or S104 is YES, and the drive mechanism 11 is driven to set the image light irradiation direction of the laser projector 10 on the seat of the driver's seat (S106).

  Next, image light is irradiated from the laser projector 10 into the vehicle interior to display a message (for example, WELCOME) (S108). Specifically, as shown in FIG. 6, the luminance of the image light is periodically reversed at regular intervals, and a message (WELCOME) is displayed on the seat of the driver's seat so as to invert negative / positive.

  When the still image is displayed on the seat of the seat, the visibility of the image may be deteriorated due to the seat fabric or the seat pattern of the seat, but in this embodiment, as shown in FIG. Visibility is improved by displaying a message so that the image is reversed in the positive direction and changing the image.

  Next, it is determined whether or not the vehicle door is changed from the closed state to the open state based on the door open signal (S110). In this way, it is estimated whether or not an occupant gets into the vehicle based on whether or not the door of the vehicle has changed from the closed state to the open state.

  When the occupant changes the door of the vehicle from the closed state to the open state, the determination in S110 is YES and time measurement is started (S112). Specifically, the time from when the vehicle door changes from the closed state to the open state is counted.

  Next, it is determined whether or not a predetermined reference time (here, 1 second) has elapsed since the start of counting (S114).

  When one second has elapsed from the start of the count, the determination in S114 is YES, and then the message (WELCOME) display is turned off (S116).

  In this way, it is estimated whether or not an occupant gets into the vehicle based on whether or not the door of the vehicle is changed from a closed state to an open state, and is determined in advance after it is estimated that the occupant gets into the vehicle. When the reference time (here, 1 second) elapses, the laser projector 10 stops the irradiation of the image light. Thereby, the WELCOME display on the driver's seat is turned off, and the image light is not irradiated to the passenger.

  Next, the drive mechanism 11 is driven to set the image light irradiation direction of the laser projector 10 above the center console C (S118). Thus, the irradiation direction of the image light of the laser projector 10 is changed from the seat in the passenger compartment to the center console C so as not to irradiate the passenger with the image light.

  Next, image light is emitted from the laser projector 10 into the vehicle interior to display a message (START and arrow) indicating the engine start switch (S120). Specifically, as shown in FIG. 8, “START” and an arrow mark indicating the position of the proximity sensor 21 are displayed so that the luminance of the image light is periodically reversed at every predetermined time, and negative / positive is reversed. Display on the center console C.

  Next, it is determined whether or not a detection signal is input from the proximity sensor 21 (S122).

  When a detection signal is input from the proximity sensor 21, an engine start signal is sent to the engine start system 20 (S124).

  The engine start system 20 performs an operation for starting the engine in response to the engine start signal.

  Next, it is determined whether or not the engine has been started based on the engine operation notification signal notified from the engine start system 20 (S126).

  If the engine is not started, the determination in S126 is NO and the process returns to S122. If the engine is started, the determination in S126 is YES, and then the display indicating the engine start switch is turned off, and the process returns to S100.

  Thus, when the engine starts normally, the display indicating the engine start switch is turned off.

  As described above, the control unit 12 displays not only when the vehicle is being boarded and when the vehicle is being boarded, but also when the vehicle is parked and when the vehicle is separated from the vehicle. FIG. 9 shows a process for performing display even when the vehicle is parked and then separated from the vehicle. The same parts as those in the flowchart shown in FIG. The control unit 12 performs the process shown in FIG. 9 in parallel with the process shown in FIG.

  First, in S100, it is determined whether or not the ignition switch of the vehicle is OFF based on the ignition switch signal.

  In S102, it is determined whether there is an occupant in the vehicle interior based on the seating sensor signal.

  In S104, it is determined based on the door lock signal whether the vehicle entrance / exit door has shifted from unlocked to locked.

  When the ignition switch of the vehicle is on, when there is an occupant in the passenger compartment, or when the door lock is not shifted from unlocked to locked, the determination of S100 is NO, the determination of S102 is YES, Or determination of S204 becomes NO and returns to S100.

  In addition, when the vehicle ignition switch is off and there is no occupant in the passenger compartment and the vehicle door lock shifts from unlocked to locked, the determination of S100 is YES, the determination of S102 is NO, and S204 The determination is YES, the drive mechanism 11 is driven, and the image light irradiation direction of the laser projector 10 is set on the seat of the driver's seat (S206).

  Hereinafter, in S208 to S214, it is determined whether or not the vehicle has an abnormal state that is not suitable for parking.

  In S208, based on the window opening signal, it is determined whether or not one of the window glasses provided on each door for getting on and off the vehicle is in an open state.

  In S210, it is determined based on the door open signal whether one of the doors in the trunk room of the vehicle and each door for getting on and off is in an open state (including a half-door state).

  In S212, it is determined based on the light signal whether the headlamp and the vehicle width lamp are in the off state.

  In S214, it is determined whether or not the parking brake is off based on the parking brake signal.

  In S208 to S214 described above, if even one is determined as YES, it is determined that the vehicle has an abnormal state that is not suitable for parking. That is, when one of the window glasses provided at each door for getting on and off the vehicle is in an open state, or at one of the door for the trunk room of the vehicle and each door for getting on and off (the half-door state is changed). If the headlight and the width lamp are off, or if the parking brake is off, it is determined that the vehicle has an abnormal state that is not suitable for parking. .

  When it is determined that the vehicle has an abnormal state that is not suitable for parking, a message indicating that the vehicle has an abnormal state that is not suitable for parking is displayed (S216). Specifically, an image is displayed together with a message indicating an abnormal location that is not suitable for parking in the vehicle so that the position of the abnormal state can be specified. For example, when one door for getting on and off the vehicle is a half-door, an arrow indicating the direction of the half-door is displayed together with the “half-door” on the seat of the driver's seat. In this case, the luminance of the image light is periodically reversed at regular intervals, and display is performed so as to invert negative / positive.

  Next, it is determined whether or not a predetermined reference time (here, 3 seconds) has elapsed since the message was displayed (S218).

  When the reference time (here, 3 seconds) has elapsed since the message was displayed, the message display is turned off (S220), and the process returns to S100.

  In this way, when the reference time has elapsed since the message was displayed, the message display is turned off to save power.

  According to the configuration described above, when it is determined that no occupant is present in the vehicle interior, the image light is emitted from the image light generation device to the vehicle interior and the image is displayed, so that the display location of the image is not limited. Therefore, video display can be performed more effectively.

  Also, if the display part is uneven or if there is a pattern or pattern on the display part, the visibility of the image displayed on the display part is deteriorated, but the image is displayed to change, Visibility can be improved.

  In addition, this invention is not limited to the said embodiment, Based on the meaning of this invention, it can implement with a various form.

  For example, in the above embodiment, it is determined in S100 that the ignition switch of the vehicle is off, it is determined in S102 that no occupant is present in the passenger compartment, and the vehicle door lock is in the unlocked state from the locked state in S104. In the case where it is determined that the image has been shifted to, the example in which the image is displayed by irradiating the laser projector 10 with the image light in S108 has been shown. For example, regardless of the determination results in S100 and S104, If it is determined that there is no occupant, the laser projector 10 may be irradiated with image light to display an image.

  Further, in the above embodiment, the luminance of the image light is periodically reversed every predetermined time, and a message (WELCOME) is displayed on the driver's seat so as to reverse the negative / positive as shown in FIG. For example, the driving mechanism 11 is driven to change the image light irradiation direction of the laser projector 10 and, as shown in FIG. 10, a message (WELCOME) is sent so that the display position moves. May be displayed on the seat. Alternatively, the moving image may be displayed on the laser projector 10 so that the message moves as shown in FIG. 11 while the image light irradiation direction of the laser projector 10 is fixed. When displaying a moving image, the message may be rotated or the size may be changed.

  Also, in the above embodiment, the message (START and arrow) is displayed on the center console C so that the luminance of the image light is periodically inverted at regular intervals and the negative / positive inversion is performed as shown in FIG. Although an example of display is shown, for example, the drive mechanism 11 is driven to change the irradiation direction of the image light of the laser projector 10 and, as shown in FIG. 12, a message (START and arrow) to move the display position. May be displayed on the center console C. Alternatively, a moving image may be displayed on the laser projector 10 as shown in FIG. 13 while the image light irradiation direction of the laser projector 10 is fixed. When displaying a moving image, the message may be rotated or the size may be changed.

  In the above embodiment, an example in which the image light generating device is configured using the laser projector 10 using a laser diode as a light source has been described. However, the image light generating device may be configured using a light emitting element other than the laser diode as a light source. Good.

  In the above embodiment, when it is determined that there is no occupant in the vehicle compartment, the image is displayed by irradiating the vehicle seat with the image light. However, the image light is displayed on the center console of the vehicle. The image may be displayed after irradiation.

  In the above embodiment, an example in which video is displayed by irradiating video light on the driver's seat or the center console of the vehicle is shown. However, the present invention is not limited to these positions. Images can be displayed at various positions in the vehicle interior, such as on the top, on the rear seat, on the instrument panel, on the center of the steering wheel, and on the rear of the rear seat.

  In the above embodiment, the example in which it is determined in S102 whether or not an occupant is present in the vehicle interior based on the seating sensor signal is shown. However, the present invention is not limited to such an example. A camera that captures an image of the interior of the vehicle and a memory that stores an image captured by the camera in a state where no passenger is present in the vehicle interior, and includes an image of the vehicle interior captured by the camera and the vehicle interior stored in the memory. It may be determined whether an occupant is present in the passenger compartment by comparing the image taken in the absence of the vehicle.

  Moreover, in the said embodiment, although the example which estimates whether an occupant boarded a vehicle based on whether it was detected that the door of the vehicle changed from the closed state to the open state was shown, The present invention is not limited to an example, and for example, it may be estimated whether or not an occupant gets into the vehicle from a captured image of a camera that captures the interior of the vehicle.

  Further, in the above embodiment, it is estimated whether or not an occupant gets into the vehicle based on whether or not the door of the vehicle is changed from the closed state to the open state. An example in which the laser projector 10 is stopped from irradiating the image light when a predetermined reference time (for example, 1 second) has elapsed has been described. You may change the time. Further, S112 and S114 in FIG. 5 may be omitted, and when it is estimated that an occupant gets on the vehicle, the laser projector 10 may immediately stop the irradiation of the image light.

  Moreover, in the said embodiment, when one of the window glass provided in each door for boarding / alighting of a vehicle is an open state, or the door of a trunk room of a vehicle and each door for boarding / alighting are open. If the vehicle is in a half-door state, if the headlights and width lights are off, or if the parking brake is off, the vehicle is not suitable for parking However, the present invention is not limited to such a state. For example, when the sunroof is in an open state, it is determined that the vehicle has an abnormal state that is not suitable for parking. May be.

  Moreover, in the said embodiment, when one door for boarding / alighting of a vehicle is a half door, the direction of the door which is a half door is shown with the message which represents "half door" on the seat of a driver's seat. Although an example of displaying an arrow is shown, it is not limited to such a display method. For example, a message (for example, “half door”) indicating that there is an abnormal state on the seat is displayed, and this message is displayed. The image may be displayed so that the occupant can identify the position of the abnormal state by moving in the direction of the half-door. For example, when the door of the driver's seat is a half door, the message “half door (driver's seat)” may be displayed.

  The correspondence between the configuration in the above embodiment and the configuration in the claims will be described. The laser projector 10 corresponds to an image light generation device, S102 corresponds to an occupant determination unit, and S106, S108, S116, and S118. , S120, S128, and S216 to S220 correspond to display control means, the camera corresponds to photographing means, the memory corresponds to storage means, S110 corresponds to occupant occupancy estimation means, and S112 and S114 correspond to elapsed time determination means. The vehicle door ECU corresponds to the door open / close state detection means, the drive mechanism 11 corresponds to the irradiation direction control means, S204 corresponds to the parking estimation means, and S208 to S214 correspond to the abnormal state determination means. The vehicle door ECU corresponds to the window open / close state detection means, and the vehicle light control switch corresponds to the lighting state detection means. And the parking brake switch of the vehicle corresponds to the parking brake state detecting means.

It is a figure which shows the structure of the display apparatus for vehicles which concerns on one Embodiment of this invention. It is a figure for demonstrating a laser projector. It is a figure for demonstrating a laser projector. It is a figure for demonstrating the display position by a laser projector. It is a flowchart which shows the process of the control part of the display apparatus for vehicles. It is a display example when displaying the message by periodically inverting the luminance of the image light. It is a display example at the time of displaying the message on the seat of the driver's seat by periodically inverting the brightness of the image light. It is a display example when displaying the message by periodically inverting the brightness of the image light. It is a flowchart which shows the process of the control part of the display apparatus for vehicles. It is a figure which shows the modification of a message display. It is a figure which shows the modification of a message display. It is a figure which shows the modification of a message display. It is a figure which shows the modification of a message display.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Display apparatus for vehicles, 10 ... Laser projector, 11 ... Drive mechanism, 12 ... Control part,
20 ... Engine start system, 21 ... Proximity sensor.

Claims (19)

An image light generating device that is disposed in the passenger compartment and collects light from a light source to generate image light;
Occupant determination means for determining whether an occupant is present in the passenger compartment;
When the occupant determination means determines that no occupant is present in the vehicle interior, the image light generation device includes display control means for irradiating the image light into the vehicle interior and displaying an image. A display device for vehicles. The vehicle display device according to claim 1, wherein the position where the image light is irradiated is a seat or a center console of the vehicle. The occupant determination means determines whether or not there is an occupant in the vehicle interior based on whether or not seating in the seat in the vehicle interior is detected by a seating sensor that detects presence or absence of seating in the seat in the vehicle interior. The vehicle display device according to claim 1, wherein the vehicle display device is determined. Photographing means for photographing the vehicle interior;
Storage means for storing an image photographed by the photographing means in a state where no passenger is in the vehicle interior,
The occupant determination means compares the image taken by the photographing means with the image taken in a state where there is no occupant in the vehicle compartment and stored in the storage means. The vehicle display device according to claim 1, wherein it is determined whether or not it exists. Occupant occupant estimation means for estimating that an occupant gets on the vehicle,
5. The display control unit, when the occupant estimation unit estimates that an occupant gets on the vehicle, causes the image light generation device to stop the irradiation of the image light. The vehicle display device according to any one of the above. Elapsed time determination means for determining whether or not a predetermined reference time or more has elapsed since it was estimated by the occupant occupant estimation means that the occupant gets on the vehicle,
When it is determined that a predetermined reference time or more has elapsed since the elapsed time determination unit estimated that an occupant got on the vehicle, the display control unit sends the video light to the video light generation device. The vehicle display device according to any one of claims 1 to 4, wherein the irradiation of the vehicle is stopped. The occupant occupancy estimating means detects that the occupant gets into the vehicle when the door open / close state detection means for detecting the open / close state of the door of the vehicle detects that the door of the vehicle has changed from the closed state to the open state. The vehicle display device according to claim 5, wherein the vehicle display device is estimated. When the occupant determination unit determines that an occupant is present in the vehicle interior, the display control unit causes the image light generation device to irradiate the image light and display an image while avoiding the occupant. The vehicle display device according to any one of claims 1 to 7. The vehicle display device according to any one of claims 1 to 8, wherein the display control means displays the image so as to change. The vehicle display device according to claim 9, wherein the display control unit periodically inverts the luminance of the video so that the video changes. An irradiation direction control means for changing an irradiation direction of the image light of the image light generation device;
The vehicle display according to claim 9, wherein the display control unit moves the display position of the image by changing the irradiation direction of the image light of the image light generation device to the irradiation direction control unit. apparatus. The vehicle display device according to claim 9, wherein the display control unit displays a moving image on the video light generation device so that the video changes. Parking estimation means for estimating whether or not the vehicle is parked;
An abnormal state determination means for determining whether the vehicle has an abnormal state that is not suitable for parking based on a signal input from a device mounted on the vehicle,
The occupant determination means determines that no occupant is present in the vehicle interior, the parking estimation means estimates that the vehicle is parked, and the parking state determination means determines that the vehicle has the abnormal state. In this case, the display control means causes the image light generation device to irradiate the image light into the vehicle interior to display an image indicating that the vehicle has an abnormal state that is not suitable for parking. The vehicle display device according to any one of claims 1 to 12. When the window open / closed state detecting unit that detects the open / closed state of the window of the vehicle detects that the window of the vehicle is open, the abnormal state determining unit detects the abnormality in the vehicle. The vehicle display device according to claim 13, wherein it is determined that there is a state. When the door open / closed state detecting unit that detects the open / closed state of the door of the vehicle detects that the at least some of the doors are in an open state or a half-door state, The vehicle display device according to claim 13 or 14, wherein the vehicle is determined to have the abnormal state. The abnormal state determining means detects that the vehicle headlamp or the vehicle width lamp is in a lit state by the lighting state detection means for detecting the lighting state of the vehicle headlamp or the vehicle width lamp. The vehicle display device according to claim 13, wherein the vehicle is determined to have the abnormal state. When the parking brake state detecting unit that detects an on / off state of the parking brake of the vehicle detects that the parking brake of the vehicle is off, the abnormal state determination unit The vehicle display device according to claim 13, wherein it is determined that there is a state. The vehicle display device according to claim 13, wherein the display control unit displays the video so that the position of an abnormal state that is not suitable for parking in the vehicle can be specified. The display control means, when the occupant determination means determines that an occupant is present in the passenger compartment, displays the image by irradiating the image light while avoiding a seat in the passenger compartment. The vehicle display device according to any one of 2 to 18.

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