JP6285203B2 - Aerial image display device for vehicle - Google Patents

Description

  The present invention relates to an aerial image display device that is mounted on a vehicle such as an automobile and that can display, for example, an image for assisting driving in a space around the host vehicle.

  In order to support driving of an automobile, a technique has been proposed in which an image including information effective for driving support is projected and drawn on a road surface, and a driver visually recognizes the image to perform safe driving. Patent Document 1 detects the lane in which the host vehicle is traveling, determines whether the host vehicle deviates from the detected lane, and alerts the driver when there is a risk of departure. A technique for projecting and displaying information and images for projecting laser light on a road surface in front of the host vehicle has been proposed.

  Patent document 1 is a technique which projects on the road surface ahead of the own vehicle using a laser beam. For this reason, it is difficult to perform a suitable projection on the road surface when the road surface is wet with water and has a high light reflectance, such as during snowfall or rain. Therefore, it is considered to employ a technique for projecting an aerial visible image described in Patent Document 2. In the technique of Patent Document 2, a high-energy laser beam is condensed in the air to raise the temperature of the gas in the condensing region to emit plasma, and a desired pattern is scanned by scanning the light emitting points in time series. It is a technology to display the image.

JP 2010-26759 A Japanese Patent No. 3650811

  In the technique of Patent Document 2, since gas in the air emits plasma, it is necessary to condense the laser light to bring the condensing point into a high energy state. Therefore, when the laser light is projected and collected on an object existing around the host vehicle, particularly on another vehicle or a pedestrian, thermal damage due to the light energy when the laser beam is collected occurs. For example, if the laser beam is focused on the vehicle body painted surface of another vehicle, the painted surface is damaged. Alternatively, when concentrated on a pedestrian, the pedestrian's skin and eyes may be damaged. Therefore, in consideration of safety with respect to other vehicles and pedestrians, the technique of Patent Document 2 cannot be directly applied to the driving support technique of Patent Document 1.

  An object of the present invention is to provide a vehicle aerial image display device capable of displaying an aerial image for driving assistance, for example, while ensuring safety with respect to an object existing around the host vehicle. .

  The present invention condenses laser light at a target position in the air to generate light emission, uses the light emission to display a desired image as an aerial image, and detects an object present at the target position. And a display stop means for stopping the display of the aerial image when an object is detected.

  The laser display device according to the present invention is configured as a laser display device that condenses light emitted from a laser light source at a target position and emits plasma at a gas at the target position. The laser display device according to the present invention may be configured by a plurality of laser display devices each emitting a laser light source, and the laser light emitted from each laser display device may be superposed at the target position. In this case, at least one of the plurality of laser display devices collects the laser light at the target position, and the other laser display devices are configured to project the laser light to a required range including the target position.

The display stop unit according to the present invention is configured to analyze the image captured by the unit that captures the region including the target position, that is, the region to be displayed, to detect the object, and to determine the positional relationship between the detected object and the target position. Including the means for calculating , the display is stopped when both positions overlap .

  According to the present invention, when it is detected that an object is present at the position of the aerial image to be displayed with the laser beam, the display of the aerial image with the laser beam is stopped, so that the laser beam is projected onto the object. The damage to the object due to the laser beam can be prevented. In particular, when a laser display device that focuses laser light on a target position and applies plasma light to gas in the air using the collected light energy, the object is thermally damaged by the light energy of the collected laser light. Can be prevented.

  In addition, according to the present invention, by condensing the laser beams of a plurality of laser display devices in a superimposed state, the laser beam of one laser display device can be configured to have a low output. Can be reduced in size and power consumption.

Furthermore, according to the present invention, an area to be displayed is imaged, the positional relationship between the presence of the object and the display position of the object is obtained based on the captured image, and the display is stopped when both positions overlap. Therefore, when there is a possibility of damaging the object by the laser beam, the display by the laser beam is stopped in advance, and the damage to the object can be surely prevented.

1 is an external perspective view of an automobile provided with a display device of the present invention. The perspective view which shows schematic structure of a laser display apparatus. 1 is a block configuration diagram of a display device of the present invention. The top view of the assistance pattern displayed when this invention is applied to a driving assistance device. The perspective view explaining one form of a display, and a model side view. The perspective view explaining the other form of a display, and a model side view. The schematic top view explaining the form which condenses a laser beam.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic external perspective view of an embodiment in which the aerial image display device of the present invention is applied to an automobile driving support device. Laser display devices 1 are respectively mounted on left and right headlamps L-HL and R-HL of a car (hereinafter also referred to as a host vehicle) CAR. The laser display device 1 is connected to a driving support ECU (electronic control unit) 2 that is disposed on the body of the car CAR and performs driving support control, and the surrounding area of the car CAR is controlled by the driving support ECU 2. In particular, it is possible to display a support image for assisting driving in the front area as an aerial image.

  As shown in FIG. 2, the laser display device 1 includes a laser light source 11 that emits laser light L, a collimator lens 12 that uses the laser light L emitted from the laser light source as a parallel light beam, and the collimator. A condensing lens 13 including a zoom lens that condenses the laser light L that has been converted into a parallel light beam by the lens 12 and projects it onto a required area in front of the host vehicle is provided. Further, a scanning unit 14 that scans the focused laser beam L corresponding to an image to be displayed and a shutter unit 15 that shields the laser beam scanned by the scanning unit 14 at a required timing are provided. Yes. Further, the condenser lens 13 is provided with a zoom unit 16 for controlling the focal length.

  The laser light source 11 is a YAG laser device or a high-power semiconductor laser element that emits high-power laser light having a wavelength in the visible region or invisible region. Here, a discrete high-power semiconductor laser element is used. The scanning unit 14 includes, for example, a horizontal deflection mirror (H mirror) 14h tilted around a vertical axis, and a vertical deflection mirror (V mirror) 14v tilted around the horizontal axis, and the mirrors 14h and 14v tilt. The laser beam L is sequentially reflected by each of the mirrors 14h and 14v while changing the angle, so that the laser beam L can be scanned in a two-dimensional direction of the horizontal direction (H direction) and the vertical direction (V direction). . The shutter unit 15 is controlled to open and close in synchronization with the scanning of the laser beam L by the scanning unit 14, and transmits the laser beam L toward the scanning unit 14 when the shutter unit 15 is opened. The focal length of the condensing lens 13 is controlled by the zoom unit 16 and the converging position of the laser beam scanned by the scanning unit 14 is controlled to change along the projection direction (optical axis direction) of the laser beam L.

  According to the laser display device 1, the laser light source 11 continuously emits the laser light L, and the shutter unit 15 transmits or blocks the emitted laser light at a required timing. In the scanning unit 14, the laser beam L transmitted through the shutter unit 15 is scanned in the H direction and the V direction by the mirrors 14h and 14v, that is, in the horizontal direction and the vertical direction as viewed from the host vehicle. The scanned laser light L is condensed in a dot shape at the target position according to the focal length of the condenser lens 13 set by the zoom unit 16.

Thus, the laser light L is condensed at the target position by the laser display device 1. The laser display device 1 is configured so that the power density of the light energy of the condensed laser light L is at least 10 ⁸ W / cm ² at the target position, so that the gas present in the air at the target position is Plasma light is emitted. Then, when the laser beam L is sequentially focused on a large number of points (target positions) in time series in the scanning unit 14 of the laser display device 1, there are two points where the laser beam L is condensed and plasma is emitted. Since it is moved at high speed in three or three dimensions, a desired two-dimensional or three-dimensional support image is displayed as an aerial image in the air due to an afterimage of these light emitting points by connecting a large number of light emitting points.

  FIG. 3 is a block diagram of the driving support apparatus according to the embodiment configured using the laser display device 1. The laser display device 1 is disposed in the lamp housings 10 of the left and right headlamps L-HL and R-HL, and the lighting lamp unit 11 that is built in each lamp housing 10 is turned on. Regardless of the non-lighting state, the support image can be displayed at an arbitrary timing by the control of the driving support ECU 2. The driving support ECU 2 can drive the left and right laser display devices 1 simultaneously or individually, and alternately in time series.

  In order to acquire road information, the driving support ECU 2 is connected to an imaging camera CAM that is disposed at a position facing the windshield of the automobile CAR shown in FIG. 1 and images a front area of the host vehicle. Although not shown in FIG. 1, so-called road-to-vehicle communication is performed between the navigation device NAV provided in the car CAR and various road facilities provided on the road on which the car (own vehicle) CAR runs. A road-to-vehicle communication device TR for going and acquiring road information is connected. Further, a vehicle speed sensor Sv that detects the vehicle speed of the host vehicle and a steering angle sensor Sθ that detects the steering angle of the steering wheel operated by the driver are connected to detect the traveling state of the automobile CAR.

  The driving support ECU 2 uses the image of the front area captured by the imaging camera CAM, information on the road on which the vehicle travels, particularly road information such as a hill, tunnel, curved road, or straight road, and a road existing on the road. A road information detection unit 21 that detects road information such as signs and lane lines drawn on the road surface is provided. The driving support ECU 2 detects the steering direction of the host vehicle, that is, the traveling direction from the output of the steering angle sensor Sθ, and detects the current vehicle speed of the host vehicle from the output of the vehicle speed sensor Sv. Is provided with a traveling state detector 22 for detecting the traveling state of the vehicle.

  Further, the driving assistance ECU 2 determines from the image of the front area captured by the imaging camera CAM at least an object existing in the front area of the host vehicle, in particular, another vehicle such as a preceding vehicle, an oncoming vehicle, or a stopped vehicle, or a pedestrian, Further, an object detection unit 23 that detects an object installed on the road as an object is provided. Assistance for determining whether or not assistance is required for driving the host vehicle based on the road information detected by the road information detection unit 21 and the driving state of the host vehicle detected by the driving state detection unit 22 A determination unit 24 is provided. For example, the support determination unit 24 sets an appropriate driving state such as a vehicle speed and a steering direction that are preferable for safe travel of both vehicles based on the road information detected by the road information detection unit 21. Then, the current driving state of the host vehicle detected by the driving state detection unit 22 is compared with the set appropriate driving state, and driving support is required when it is determined that the current driving state is out of the proper driving state. Judge that there is.

  Further, the driving support ECU 2 includes a display control unit 25 for controlling a support image displayed on the laser display device 1 based on the determination result of the support determination unit 24. The display control unit 25 can display an aerial image around the host vehicle, here in front of the host vehicle, by controlling the laser display device 1 as described above. For example, a plurality of support images are stored in advance as electronic data in the display control unit 25, and electronic data of a predetermined support image is selected based on the determination result of the support determination unit 24. Then, the support image is displayed by driving the scanning unit 14, the shutter unit 15, and the zoom unit 16 of the laser display device 1 based on the selected electronic data. On the other hand, the display control unit 25 can also control to stop the display on the laser display device 1 when the object detection unit 23 detects an object. Here, it is possible to stop the display by blocking the laser beam in the shutter unit 15, and this shutter unit 15 constitutes a part of the display stop means in the present invention.

  FIG. 4 is a diagram illustrating an example of a support image. FIG. 4A shows a lane line image Da displaying a pseudo lane line for clearly indicating the lane region in which the host vehicle CAR travels, and FIG. 4B shows that the destination road of the host vehicle is a curved road. An arrow-shaped curved road image Db to be displayed and FIG. 4C are intersection images Dc displaying intersections existing at the destination. Each of these support images is a two-dimensional image that extends at least in the front-rear direction and the left-right direction of the host vehicle, or a three-dimensional image that extends further in the front-rear direction, the left-right direction, and the upper-lower direction of the host vehicle. It is displayed.

  According to the driving support apparatus of the embodiment having the above configuration, the driving support ECU 2 is based on the road information detected by the road information detection unit 21 and the traveling state of the host vehicle detected by the traveling state detection unit 22. 24 determines whether or not driving support is necessary, and when it is determined that driving support is necessary, the display control unit 25 controls driving of the laser display device 1 and uses the necessary support image as an aerial image in the front area of the host vehicle CAR. To display. Alternatively, driving assistance may be executed by driving the driving assistance ECU 2 by a driver's operation, and a support image may be displayed.

  For example, FIG. 5 is a diagram for explaining the display form of the lane line image Da shown in FIG. 4A, and FIG. 5A shows a perspective view of the front region viewed from the driver's seat. When the driver determines that it is difficult for the driver to see the lane line drawn on the road surface because the road surface on which both vehicles are traveling is wet, such as when driving in rainy weather, the driver assistance ECU 2 is driven manually. The lane line image Da is displayed in the air in front of the host vehicle by the laser display device 1. Further, even if the driver does not drive the driving assistance ECU 2, when the lane line cannot be detected by the road information detection unit 21 of the driving assistance ECU 2, the assistance determination unit 24 needs assistance for displaying the lane line image Da. The display control unit 25 performs display on the laser display device 1.

  When executing the display, the display control unit 24 selects electronic data of the lane line image Da to perform driving support, and outputs this to the left and right laser display devices 1. When this electronic data is input, the laser display device 1 emits a laser beam L from the laser light source 11, and simultaneously controls the scanning unit 14, the shutter unit 15, and the zoom unit 16 based on the electronic data. Accordingly, as described above, the condensing position of the laser light L emitted from the laser display device 1 is scanned in the H direction and the V direction, and at the same time, the focal length of the condensing lens 13 is controlled to change. Further, the projection of the laser beam L is intermittently performed by the shutter unit 15 as necessary.

  FIG. 5B is a schematic side view when the lane line image Da is displayed. The laser light L projected from each laser display device 1 is the road surface R on the left and right sides of the front area of the host vehicle. The light is collected in the air several to several tens of centimeters above and is scanned along left and right lane lines (not shown) actually drawn on the road surface. When the laser beam L is scanned in the H direction, the laser beam L is deflected in the left-right direction in front of the host vehicle, and when scanned in the V direction, the laser beam L is deflected in the front-rear direction in front of the host vehicle. By changing the focal length of the condensing lens 13 in synchronization with this, the condensing position of the laser light L is controlled to change. As a result, in the air ahead of the host vehicle, the laser light L is condensed in time series at many points along the lane line drawn on the road surface. The gas in the air emits plasma by the light energy of the laser beam L.

  By displaying afterimages due to light emission at these many condensing points in succession, the left and right lane line images Da are two-dimensionally displayed as an aerial image in the air in front of the host vehicle. Here, the right lane line image Dar shown in FIG. 5A is displayed by the right laser display device 1, and the left lane line image Dal is displayed by the left laser display device 1. Therefore, even in situations where the road surface gets wet due to rain and it is difficult to visually recognize the original lane line, and in situations where it is difficult to project an image by a projector as in the past, the driver is required to use the lane as a support image displayed as an aerial image. The line image Da can be visually recognized, which is effective for safe driving.

  Further, the driving support ECU 2 displays the above-described support image, and at the same time, when an object, that is, another vehicle such as a preceding vehicle or a pedestrian is detected by the object detection unit 23, the display control unit displays information on the object. To 25. Here, it is assumed that a pedestrian M is detected in the front area of the host vehicle as shown in FIG. The display control unit 25 detects the position of the pedestrian M from the information and determines whether or not the position of the pedestrian M overlaps the display position of the lane line image Da displayed. Since the display position of the lane line image Da is set in advance at a predetermined distance in front of the host vehicle CAR, if the position of the pedestrian M detected by image analysis of the image captured by the imaging camera CAM is detected. It can be easily determined whether or not the vehicle line image Da displayed by the pedestrian M overlaps.

  When the display control unit 25 determines that the object position, here, the pedestrian M does not overlap the lane line image Da, the display control unit 25 displays the lane line image Da. When it is determined that the object position overlaps the lane line image Da, the display control unit 25 controls the shutter unit 15 of the laser display device 1 so as to close the shutter. Thereby, the laser beam of the laser light source 11 is shielded and not output to the scanning unit 14, and the display of the lane line image Da by the laser beam is stopped. Therefore, it is possible to prevent the laser light L emitted from the laser display device 1 from being projected and condensed on the pedestrian M, and damage to the pedestrian M is prevented. Therefore, the object detection unit 23, the display control unit 25, and the shutter unit 15 of the driving assistance ECU 2 constitute display stop means of the present invention.

  As another example of the display of the support image, FIG. 6 shows an example of the curve image Db in FIG. Based on the information of the image captured by the imaging camera CAM in the road information detection unit 21 and the road information from the navigation device NAV when the host vehicle CAR is traveling, the road condition of the destination of the host vehicle CAR, for example, an uphill curve that turns to the right Detect that the road. The assistance determination unit 24 determines whether assistance for the driver is necessary for the detected road information. For example, if it is determined that the current steering direction of the host vehicle CAR obtained from the traveling state detection unit 22 is not appropriate for the curved road and needs assistance, the display control unit 25 displays the curved road image Db based on this. The electronic data is selected, and the laser display device 1 displays a right-turned road image Db as an aerial image in the front area of the host vehicle CAR as shown in FIG. 6A.

  FIG. 6B is a schematic side view at that time. The laser display device 1 emits laser light, and the laser light transmitted through the shutter unit 15 based on the electronic data of the curved image Db is scanned by the scanning unit 14. The zoom unit 16 controls to change the focal length of the condenser lens 13 at the same time. In this case, the curved image Db is displayed by condensing the laser beam L in the air at a position slightly lower than the line-of-sight height of the driver DR above the road surface R in the front area of the host vehicle CAR. At this time, the left and right laser display devices 1 may cooperate to perform display, or only one of the laser display devices 1 may perform display.

  Thereby, in the front area of the host vehicle CAR, the laser light is condensed in time series at a number of points in the air that are somewhat lower than the line of sight of the driver DR, and plasma emission is performed at each point. A curve image Db that turns to the right with an afterimage of the light emitting point is displayed. The curved road image Db may be a two-dimensional image similar to the lane line image Da, but here, it is detected that the road to be traveled is an uphill, so that it is shown in FIG. As described above, the curved road image Db is displayed as a three-dimensional image having a gradient in which the travel destination side is inclined upward. By making the inclination angle displayed at this time an angle corresponding to the actual slope of the uphill slope, the driver can easily recognize the slope of the uphill slope. Therefore, the driver visually recognizes the curved road image Db as the support image displayed in the air in front of the host vehicle, executes an appropriate vehicle speed operation and steering operation corresponding to the curved road, and ensures safe driving. .

  Even in this case, the display control unit 25 detects the position of an object such as another vehicle or a pedestrian existing in front of the host vehicle detected by the road information detection unit 21 and displays the position of the object. Here, it is determined whether or not the curve image Db overlaps. When it is determined that the object position does not overlap with the support image, the display control unit 25 executes display. As shown in FIG. 6B, the preceding vehicle CAR1 is detected as an object, and when it is determined that the position of the preceding vehicle CAR1 overlaps the curved image Db, the display of the curved image Db is stopped. As a result, the laser light L emitted from the laser display device 1 can be prevented from being focused on the preceding car CAR1, and damage to the preceding car CAR1 is prevented.

  Here, when two laser display devices 1 are provided on the left and right of the car CAR as in this embodiment, the laser beams Ll and Lr emitted from the left and right laser display devices 1 are overlapped for support. An image may be displayed. That is, as schematically shown in FIG. 7A, the left and right lasers L1 and Lr emitted from the left and right laser display devices 1L and 1R are condensed at the same target position P1 in the air. The outputs of the lights Ll and Lr are superimposed at the target position P1, and the light energy at the target position is increased to emit plasma. By doing in this way, the output of each laser beam of each laser display apparatus 1L and 1R can be reduced to almost half, and the laser light source of each laser display apparatus 1L and 1R can be reduced in size and power consumption can be reduced. . In particular, it is possible to apply to the present invention a laser display device in which a laser light source is constituted by a semiconductor laser having a light output lower than that of a YAG laser.

  As shown in FIG. 7A, the laser beams Ll and Lr of the left and right laser display devices 1L and 1R are condensed in a state where the laser beams Ll and Lr are overlapped on the target position P1. High control accuracy in the zoom unit is required, and control becomes difficult. If the condensing points of the two laser beams are shifted, a necessary output cannot be obtained and plasma emission may not occur. Therefore, for example, as shown in FIG. 7B, zoom control is performed so that the laser beam Lr is focused on the target position P1 in one laser display device 1R, but the other laser display device 1L is collected by zoom control. It is conceivable to shift the light spot from the target position P1.

  Here, the other laser display device 1L performs zoom control so that the condensing point P2 of the laser beam Ll is shifted forward (distant) from the target position P1, thereby allowing the scanning unit and the zoom unit of the laser display device 1L to be shifted. Even when a deviation occurs in the control, the laser beam Ll is projected in the range of the required diameter at the target position P1. Even in this case, since the other laser beam Ll is superimposed at the target position P1 where one of the laser beams is condensed, plasma emission is caused by an increase in light energy due to the overlap of both laser beams Ll and Lr. Become. Accordingly, it is possible to relax the laser beam scanning and zoom control accuracy in the other laser display device 1L, and it is possible to emit plasma reliably at the target position.

  In the above embodiment, the example in which the laser beams of the laser display devices respectively disposed on the left and right sides of the automobile are superimposed and collected has been described, but a plurality of laser light sources are provided in one laser display device, and each laser beam is provided. You may comprise as a laser display apparatus comprised so that the laser beam of a light source might be each superimposed and condensed. If comprised in this way, one laser display apparatus of the low output and low power consumption which can ease the control precision at the time of superimposing a some laser beam on a target position can be comprised.

  In the embodiment, the shutter is closed when the display by the laser beam is stopped. However, the laser light source may be turned off when the time for stopping the display becomes long. In particular, when a semiconductor laser element is used as the laser light source, the light emission response of the semiconductor laser element (light emission / quenching response corresponding to power on / off) is fast, so the display is stopped by turning off the laser light source. By configuring so, the shutter portion can be omitted, and the laser display device can be miniaturized. In addition, when the driver visually recognizes the object, the display may be forcibly performed by operating a switch. In particular, the object is detected and the display is highly likely to be stopped as when traveling in an urban area. During traveling, it eliminates the annoyance of intermittent display and reliably prevents damage to the object.

  In the above embodiment, when visible light is used as the laser light, the driver may feel annoyed because the laser light beam emitted from the laser display device is viewed when displaying the support image. Therefore, even if it is visible light, if the laser light close to the infrared region or the laser light close to the ultraviolet region is used, it becomes difficult for the driver to visually recognize the laser light beam, and the inconvenience can be reduced. In this case, if invisible light is used as in Patent Document 2, the driver hardly sees the laser light beam and the driver does not feel bothered.

  Although the display device of the present invention has been described as a device for displaying a support image on the driving support device, the display device of the present invention is not limited to this. For example, it can also be used for displaying a required message from the own vehicle to other vehicles. In particular, if the display device of the present invention is arranged at the rear part of the host vehicle so that images and messages are displayed in the air in the rear area of the host vehicle, an emergency situation has occurred on the host vehicle or the road ahead. Sometimes it can be used to notify other vehicles such as following vehicles of an emergency. Even in this case, it is necessary to confirm the presence or absence of an object in the display area and to stop the display when the object is confirmed.

  In the display device of the present invention, an image can be displayed at an arbitrary position in the air by the control of the operation unit and the zoom unit. It is also possible to display the original video. Therefore, when a moving object such as a pedestrian in the blind spot of the driver, such as a pedestrian behind a parked car, is detected by an infrared detection device or an ultrasonic detection device, the pedestrian is converted into a three-dimensional video It can also be displayed in front of the host vehicle. By displaying as a three-dimensional moving image in this way, the driver can correctly recognize the behavior of a moving object such as a pedestrian, which is effective in realizing a safer driving.

  The present invention can be applied to a vehicle in which an aerial image is displayed around the vehicle.

1 (1L, 1R) Laser display device 2 Driving support ECU
DESCRIPTION OF SYMBOLS 11 Laser light source 12 Collimating lens 13 Condensing lens 14 Scan part 15 Shutter part (display stop means)
16 Zoom section 21 Road information detection section 22 Traveling state detection section 23 Object detection section (display stop means)
24 Support determination unit 25 Display control unit (display stop means)
CAR car (own vehicle)
CAM camera NAV navigation device TR communication device Sθ steering angle sensor Sv vehicle speed sensor L (Ll, Lr) laser beam CAR1 preceding vehicle (object)
M Pedestrian (object)

Claims (4)

Laser light is condensed at a target position in the air to generate light emission, and a laser display device that displays the desired image as an aerial image using the light emission, detects an object present at the target position, A display stop means for stopping display of the aerial image when detected , the laser display device condensing light emitted from a laser light source at a target position, and plasma for emitting gas at the target position In the display device, the display stop unit calculates a positional relationship between the detected object and the target position by analyzing the image captured by the unit that captures the region including the target position and detecting the object. An aerial image display device for a vehicle that includes means and stops displaying when both positions overlap . The laser display device is constituted by a plurality of laser display device for emitting a laser light source, respectively, according to the laser beam emitted from the laser display apparatus to claim 1, characterized in that for superimposing at the target position An aerial image display device for a vehicle. Claim 2 wherein at least one of the plurality of laser display device a laser beam is condensed to the target position, the other laser display device characterized by projecting a laser beam in a required range including the target position An aerial image display device for a vehicle according to claim 1. The aerial image display device for a vehicle according to any one of claims 1 to 3 , wherein the laser display device is configured as a driving support device for displaying a support image for supporting driving of the vehicle.

Images