JP2015048007A - Information display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information display device, from which the troublesomeness to be felt by a user is reduced.SOLUTION: In information displaying processing to be executed by a control device of an information display device, there is identified a user's depth of field estimated from the pupil diameter of a driver (at S150). If the gazing distance is contained within the range of the identified user's depth of field (S160: YES), a virtual image VI_1 indicating necessary display information is formed as that the eyes of the driver are focused on the virtual image VI_1. Unless the gazing distance is not contained within the range of the user's depth of field (S160: NO), the eyes of the driver are not focused on the virtual image VI_1, so that a virtual image VI_2 indicating the necessary display information is formed at a position not overlying the virtual image VI_1.

Description

  The present invention relates to an information display device that displays information.

  2. Description of the Related Art Conventionally, an information display device that projects light onto a windshield of an automobile and forms a virtual image in a driver's front view to display information, a so-called head-up display (HUD) is known.

  As this type of information display device, a device has been proposed that changes the position at which the virtual image of the marker indicating the gaze object is formed in accordance with the distance to the position where the gaze object being watched by the driver is present ( Patent Document 1). In the information display device described in Patent Literature 1, the direction of the driver's line of sight is detected, and the driver is gazing at the intersection of the object existing on the line of sight and the direction of the line of sight. It is specified as the position where the gazing object exists.

JP 2005-313772 A

  However, in the information display device described in Patent Document 1, when a plurality of objects exist at different distances in the direction of the line of sight, one object existing at a distance where the user's eyes are in focus is recognized as a gaze object. It may not be possible.

  For example, in the information display device described in Patent Document 1, even if a virtual image indicating a preceding vehicle is formed, the user does not always watch the preceding vehicle as a gaze object. There is a possibility that a traffic light existing ahead of the preceding vehicle is being watched as a watch object.

  In such a case, in the information display device described in Patent Document 1, since the focus of the user's eyes does not match the virtual image indicating the preceding vehicle, the virtual image that is not in focus enters the field of view, so that the user However, there was a problem of feeling annoying.

  Therefore, an object of the present invention is to reduce annoyance felt by a user in an information display device.

  This invention made | formed in order to achieve the said objective is related with the information display apparatus (1) which is mounted in a mobile body, reflects the light which represents information with a to-be-projected member (6), and displays the said information as a virtual image.

  The information display device of the present invention includes first projecting means (40, S170), depth specifying means (40, S130 to S150), and second projecting means (40, S160, S180).

  A 1st projection means controls a projection mechanism (10) so that the light showing information may be irradiated to a 1st display area. The first display area referred to here is an area defined on the projection target member and an area defined on the path from the user's eye to the point of gaze. The gazing point mentioned here is a point in the traveling direction that the user of the moving body should watch.

  Further, the depth specifying means specifies a user depth of field that represents a range of distance that can be regarded as being in focus when the user is viewing the first display area. The second projection means displays information in the second display area if the gaze distance, which is the distance from the user's eye to the gazing point, is outside the range of the user depth of field specified by the depth specifying means. The projection mechanism is controlled so that light is emitted. The second display area referred to here is an area defined by the projection target member, and is an area that deviates from the light path from the user toward the gazing point and is non-overlapping with the first display area. .

That is, if the gaze distance is outside the range of the user depth of field, the user's eyes are not focused on the virtual image superimposed on the gaze point formed in the first display area.
For this reason, in the information display device of the present invention, if the gaze distance is outside the range of the user depth of field, a virtual image that does not overlap the gaze point is formed in the second display area. Thus, according to the information display device of the present invention, even if the user is viewing a point that is the same direction as the direction in which the gazing point exists but is different from the gazing point, the direction of the user's line of sight The formation of a virtual image that is out of focus can be suppressed.

  Therefore, in the information display device of the present invention, when the user is looking at a specific point existing in the traveling direction, the user can be reduced from seeing a virtual image that is out of focus. As a result, according to the information display device of the present invention, it is possible to reduce the user's annoyance.

The point as the point of sight is a preceding vehicle, a sign, a traffic light, etc. existing in the traveling direction of the moving body.
The reference numerals in parentheses described in this column and in the claims are intended to show the correspondence with the specific means described in the embodiments described later as one aspect, and It does not limit the technical scope of

It is a block diagram which shows schematic structure of the information display apparatus in 1st embodiment, and the peripheral device connected to the information display apparatus. It is a flowchart showing the process sequence of an information display process. (A) A table representing the relationship between light intensity and pupil diameter, and (B) a table representing the relationship between pupil diameter and depth of field. It is a block diagram which shows schematic structure of the information display apparatus in 2nd embodiment, and the peripheral device connected to the information display apparatus.

Embodiments of the present invention will be described below with reference to the drawings.
[First embodiment]
<Information display device>
An information display device 1 shown in FIG. 1 is a device mounted on an automobile as a moving body. The information display device 1 is a device (so-called head-up display (HUD)) that displays various information reflected by the projection member 6 as a virtual image VI.

  The projection target member 6 is a member on which information is projected, and is, for example, a windshield of an automobile. The projection member 6 is not limited to the windshield but may be a known combiner.

  That is, the information display device 1 of the present embodiment forms a virtual image VI in front of the host vehicle in the driver's line of sight (that is, the eye range ER) and causes the driver to visually recognize the virtual image VI. The various information displayed as the virtual image VI includes vehicle information and foreground information.

  The information display apparatus 1 includes an image projector 10 that projects light representing information, an optical unit 16 that converges (diverses) information (light) from the image projector 10, and an estimation that is used to estimate the pupil diameter of the driver. The information acquisition part 60 which acquires information, and the control apparatus 40 which controls the image projector 10 are provided.

  Among these, the video projector 10 is an apparatus (an example of a projection mechanism) that emits and projects light representing various types of information. In the present embodiment, the video projector 10 includes a first display 12 and a second display 14. The first display 12 and the second display 14 in this embodiment are each a known liquid crystal display.

  Among these, the 1st indicator 12 is arrange | positioned in the position which projects the image (light) showing information on a 1st display area. The “first display area” referred to here is a part of the display area where information is reflected on the projection member 6 and is defined on the path from the driver's eye (ie, eye range ER) to the point of sight. This is the area that has been Note that the gaze point mentioned here is a point on the traveling direction that the driver of the automobile should watch, for example, a space in the traveling direction, a preceding vehicle, or the like.

  The second indicator 14 is disposed at a position where an image (light) representing information is projected onto the second display area. The “second display area” referred to here is a part of the display area where the image (light) is reflected by the projection member 6 and is defined below the first display area along the height direction of the automobile AM. This is the area that has been That is, the second display area is an area defined so as to be out of the light path from the user's eye to the gazing point and non-overlapping with the first display area.

  The optical unit 16 is provided so that the image (light) from the image projector 10 is projected onto the projection member 6 with a specific size. The optical unit 16 in the present embodiment includes a reflecting mirror 18 and a lens 20. The reflecting mirror 18 has at least one mirror and reflects the image (light) from the image projector 10. The lens 20 enlarges / reduces the image (light) from the image projector 10.

  The case 4 is arranged in the dashboard 5 of the automobile. The case 4 is a housing that is partially opened, and houses the video projector 10 and the optical unit 16. The case 4 may be provided with a cover so as to cover the opening. The cover referred to here transmits light.

  That is, in the information display device 1, the image projected from the image projector 10 and projected through the opening of the optical unit 16 and the case 4 is projected onto the projection member 6. The image projected on the projection member 6 is a virtual image VI formed in front of the host vehicle in the driver's line of sight (ie, eye range ER).

  Among these, the light from the first display 12 is reflected in the first display area, and is formed as a virtual image VI_1 in front of the automobile. In such an information display device 1, it becomes possible for the driver to visually recognize the virtual image VI_1 projected on the projection target member 6 without moving the line of sight from a gaze object existing on the traveling path of the host vehicle.

On the other hand, the light from the second display unit 14 is reflected by the second display region, and is formed as a virtual image VI_2 at a position closer to the eye range ER than the formation position of the virtual image VI_1.
The control device 40 includes a storage device 42 and a microcomputer (hereinafter referred to as “microcomputer”) 44. The storage device 42 is a non-volatile storage device that can rewrite stored contents.

  The microcomputer 44 includes a ROM 46 that stores processing programs and data that need to retain stored contents even when the power is turned off, a RAM 48 that temporarily stores processing programs and data, and a processing program stored in the ROM 46 and RAM 48. The computer is configured mainly with a known computer having at least a CPU 50 for executing various processes.

  Among these, in the ROM 46, the microcomputer 44 executes information display processing for controlling the video projector 10 so that vehicle information and foreground information from various peripheral devices connected to the control device 40 are projected onto the projection target member 6. A processing program is stored.

  An illuminance sensor 62 is provided as the information acquisition unit 60 in the present embodiment. The illuminance sensor 62 is a known sensor that detects illuminance. The illuminance sensor 62 in the present embodiment is arranged on the dashboard 5, for example, so as to detect the illuminance around the automobile, and thus around the driver's eyes.

  Further, at least a navigation device 52 and a driving support electronic control device (hereinafter referred to as “driving support ECU”) 54 are connected to the control device 40 as sources for obtaining vehicle information and foreground information.

  The navigation device 52 is a well-known device that guides a route to a set destination according to the result of collating the current position detected by the position detector with the map data stored in the map data storage unit. The map data is well-known data including node data, link data, cost data, and the like. This map data includes various information such as information on road speed limits, the number of lanes, and intersections.

  From such a navigation device 52, the control device 40 obtains information such as the speed limit and the number of lanes of the road corresponding to the current position where the host vehicle is traveling, and the planned travel route of the host vehicle set in the navigation device 52. Acquired as foreground information.

  The driving support ECU 54 is a well-known control device that realizes driving support control by controlling the driving system and the braking system according to the obstacle detected as a result of monitoring by the periphery monitoring device 56. The driving support control referred to here is a well-known process for improving the safety of driving of an automobile, and includes cruise control, adaptive cruise control, pre-crash safety, lane keeping assist, and the like.

  The periphery monitoring device 56 is a well-known device that monitors the situation around the host vehicle. As the periphery monitoring device 56, a camera that detects an object existing around the own vehicle based on an image obtained by capturing the periphery of the own vehicle, or an object present around the own vehicle based on a result of transmitting / receiving an exploration wave. An exploration device to detect is conceivable.

  The control device 40 acquires information such as the distance to the preceding vehicle, the heading direction of the preceding vehicle (that is, the position where the preceding vehicle exists), the position where the obstacle or the sign exists, and the like as foreground information from the driving support ECU 54. To do.

Furthermore, at least an ignition (IG) signal and host vehicle state information are input to the control device 40.
Of these, the ignition signal is a known signal indicating that the ignition switch is turned on.

The own vehicle state information is information acquired as vehicle information. The vehicle state information includes, for example, warning information indicating that the remaining amount of fuel in the internal combustion engine, the coolant temperature of the internal combustion engine, and the like are in a predetermined abnormal state. The abnormal state is, for example, a state in which the remaining amount of fuel is below a specified value, and a state in which the coolant temperature is above a specified threshold value. Furthermore, the own vehicle state information includes the operation result of the direction indicator, the traveling speed of the own vehicle (that is, the vehicle speed), and the shift position of the own vehicle.
<Information display processing>
The information display process executed by the control device 40 is activated when an ignition signal is input. Thereafter, it is activated at predetermined time intervals (for example, “several [ms]”).

  When the information display process is started, as shown in FIG. 2, first, it is determined whether or not there is information that should be recognized by the driver of the moving body (hereinafter referred to as “required display information”). (S110). The display information required here is information to be projected on the projection target member 6, and is, for example, at least one of the vehicle information and at least one of the foreground information.

  As a result of the determination in S110, if the required display information does not exist (S110: NO), this information display process is terminated, and the process waits for the next activation timing. On the other hand, as a result of the determination in S110, if the required display information exists (S110: YES), the required display information is acquired (S120).

  Subsequently, estimation information is acquired (S130). The estimation information in the present embodiment is a detection result (that is, illuminance around the driver's eyes) by the illuminance sensor 62. Based on the estimated information, the driver's pupil diameter is specified (S140).

  In S140 in the present embodiment, the driver's pupil diameter corresponding to the illuminance acquired in S130 is acquired based on the pupil diameter table. Note that the pupil diameter table referred to here is a table in which illuminance (intensity of light in FIG. 3A) and pupil diameter are associated with each other as shown in FIG. This pupil diameter table is obtained in advance by experiments or the like, assuming that the pupil diameter is smaller as the illuminance is higher.

  Furthermore, in the information display process, a range of distance that can be regarded as being in focus when the driver is looking at the first display area (hereinafter referred to as “user depth of field”) is specified. (S150). In S150 in the present embodiment, the user depth of field corresponding to the pupil diameter specified in S140 is specified and acquired based on the depth of field table. The depth-of-field table referred to here is a table in which the pupil diameter and the user depth of field are associated with each other as shown in FIG. This depth-of-field table is obtained in advance by experiments or the like, assuming that the smaller the pupil diameter, the deeper the user depth of field. Note that the depth-of-field table shown in FIG. 3B is an example when the image shown at a distance of 10 m from the driver is viewed.

  Subsequently, it is determined whether or not the gaze distance is within the range of the user depth of field (S160). The gaze distance here is the distance from the driver's eye to the gaze point. For example, the gaze distance may be a distance to an object (for example, a preceding vehicle) existing in the traveling direction of the host vehicle detected by the periphery monitoring device 56. The possible reason is that when the display information is superimposition information, the information is superimposed on an object (for example, a preceding vehicle) existing in the traveling direction of the own vehicle detected by the surroundings monitoring device 56. Is to display. Alternatively, the distance to the object being watched may be estimated from the convergence angle or the like.

  If the gaze distance is within the range of the user depth of field as a result of the determination in S160 (S160: YES), the process proceeds to S170. That is, in S160, when the gaze distance is included in the range of the distance from the rear end to the front end of the user depth of field, the process proceeds to S170.

  In S <b> 170, a control signal for displaying necessary display information is output to the first display 12. The first display device 12 to which this control signal is input displays the necessary display information acquired in S120 and forms a virtual image VI_1. This virtual image VI_1 is visible to the driver without moving the line of sight from the gaze object present on the traveling path of the host vehicle. In S170 when the foreground information is acquired as the display required information, the foreground information is displayed so as to be superimposed on the target road or the preceding vehicle.

Thereafter, the information display process is terminated, and the system waits for the next activation timing.
On the other hand, as a result of the determination in S160, if the gaze distance is outside the range of the user depth of field (S160: NO), the process proceeds to S180. That is, in S160, when the gaze distance is shorter than the distance to the rear end of the user depth of field, or when the gaze distance is longer than the distance to the front end of the user depth of field, the process proceeds to S180. Transition.

  In S180, a control signal for displaying display required information is output to the second display 14. The second display unit 14 to which this control signal is input displays the necessary display information acquired in S120 and forms a virtual image VI_2. This virtual image VI_2 is formed at a position deviating from the light path from the user's eye toward the gazing point.

  Note that the formation of the virtual image VI_2 in S180 is performed by outputting a control signal for displaying the required display information to the first display unit 12 and then displaying the required display information so that the virtual image VI_1 is formed for a predetermined time. You may implement | achieve by outputting a signal with respect to the 2nd indicator 14. FIG. That is, when the focus of the user's eyes does not match the virtual image VI_1, the display of the virtual image may be transitioned to the virtual image VI_2.

Thereafter, the information display process is terminated, and the system waits for the next activation timing.
That is, in the information display processing of the present embodiment, the user depth of field estimated from the pupil diameter of the driver is estimated, and the gaze distance is included in the estimated range of the user depth of field. Then, the virtual image VI_1 representing the display information is formed on the assumption that the driver's eyes are in focus with the virtual image VI_1. On the other hand, if the gaze distance is not included in the range of the user depth of field, the driver's eyes are not focused on the virtual image VI_1. Form.
[Effect of the first embodiment]
Usually, if the gaze distance is outside the range of the user depth of field, the user's eyes are not focused on the virtual image projected on the first display area.

  For this reason, in the information display device 1, a virtual image that is not superimposed on the gazing point is formed in the second display region. Thereby, according to the information display apparatus 1, even if the user is viewing a point that is the same direction as the direction in which the gazing point exists but is different from the gazing point, the focus is in the direction of the user's line of sight. The formation of a virtual image that does not match can be suppressed.

  Therefore, in the information display device 1, the user can reduce the viewing of a virtual image that is out of focus. As a result, according to the information display device 1, it is possible to reduce the user's annoyance.

Further, the smaller the pupil diameter (that is, the aperture), the wider the range of distance that can be considered to be in focus of the user's eyes (that is, the user's depth of field becomes deeper).
Therefore, according to the information display device 1, the user depth of field can be specified with high accuracy based on the pupil diameter.

  Furthermore, in the information display process of the present embodiment, when the driver's eyes are focused on the virtual image VI_1, the display of the virtual image VI_1 is maintained. Therefore, according to the information display device 1, when the driver's eyes are in focus with the displayed virtual image VI_1, the display of the virtual image VI_1 can be maintained, and the driver can superimpose and display the virtual image VI_1. You can see the virtual image.

In the information display process of the present embodiment, after the control signal for displaying the required display information is output to the first display unit 12 so that the virtual image VI_1 is formed for a predetermined time, the control for displaying the required display information is performed. When the formation of the virtual image VI_2 is realized by outputting a signal to the second display 14, according to the information display device 1, the user's eyes are focused on the virtual image displayed in the first display area. If not, the display of the virtual image can be transitioned from the first display area to the second display area.
[Second Embodiment]
The information display device according to the second embodiment differs from the information display device 1 according to the first embodiment mainly in the configuration of the video projector 10 and the information acquisition unit 60 and the processing content of the information display processing executed by the control device 40. Is different. For this reason, in the present embodiment, the same components and processes as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted, and the video projector 10 and the information acquisition unit 60 that are different from those in the first embodiment. And the information display process will be mainly described.
<Information display device>
As shown in FIG. 4, the information display device 2 of the present embodiment includes a video projector 10, an optical unit 16, an information acquisition unit 60, and a control device 40.

Among these, the video projector 10 of the present embodiment is a single liquid crystal display 15.
The liquid crystal display 15 includes a part that emits light projected to the first display area (hereinafter referred to as “first light emitting unit”) and a part that emits light projected to the second display area (hereinafter referred to as “first light emitting unit”). (Referred to as “second light emitting portion”).

  In this embodiment, the information acquisition unit 60 includes an imaging device 64. The imaging device 64 is a well-known camera that captures an image, and is arranged toward the vehicle interior so as to capture the face of the driver of the car.

In addition, the optical part 16 and the control apparatus 40 are comprised similarly to 1st embodiment.
<Information display processing>
The information display process in the present embodiment differs from the information display process in the first embodiment only in the processing contents of S140, S170, and S180. For this reason, in the description of the information display process in the present embodiment, as described in the information display process in the first embodiment, the description will be given with reference to FIG. Are denoted by the same reference numerals and description thereof is omitted. The processing content of S140, S170, and S180, which is different from the information display processing in the first embodiment, will be mainly described.

The information display process of this embodiment is started when an ignition signal is input. Thereafter, it is activated at predetermined time intervals (for example, “several [ms]”).
In the information display process, when activated, as shown in FIG. 2, it is first determined whether or not display information is required (S110). As a result of the determination in S110, if the display required information does not exist (S110: NO), this information display process is terminated, and it waits until the next activation timing. On the other hand, as a result of the determination in S110, if the required display information exists (S110: YES), the required display information is acquired (S120).

  Subsequently, estimation information is acquired (S130). The estimation information in the present embodiment is an image taken by the imaging device 64. Based on the estimated information, the driver's pupil diameter is specified (S140).

  First, a well-known image process is performed on the image captured by the imaging device 64 to detect the driver's pupil. Specifically, in an image processing method for detecting a pupil, first, a face extraction template prepared in advance as an image representing a face is subjected to pattern matching, and an area that matches at a prescribed ratio or more is extracted as a face area. Then, an eye peripheral area including the driver's eyes may be extracted from the extracted face area, and an ellipse included in the eye peripheral area may be detected as a pupil.

  In addition, as a method for extracting an ellipse, for example, a method described in JP2007-164517A or JP2007-164518 may be used. Then, the representative value of the pupil detected by such a method may be specified as the pupil diameter.

Further, in the information display process, the user depth of field corresponding to the pupil diameter specified in S140 is specified based on the depth of field table (S150).
Subsequently, it is determined whether or not the gaze distance is within the range of the user depth of field (S160). If the gaze distance is within the range of the user depth of field as a result of the determination (S160: YES) ), A control signal for displaying necessary display information is output to the video projector 10 (liquid crystal display 15) (S170). The liquid crystal display 15 to which this control signal is input displays the necessary display information acquired in S120 on the first display unit to form a virtual image VI_1.

Thereafter, the information display process is terminated, and the system waits for the next activation timing.
On the other hand, if the result of determination in S160 is that the gaze distance is outside the range of the user depth of field (S160: NO), a control signal for displaying the display information required is output to the liquid crystal display 15 (S180). . The liquid crystal display 15 to which this control signal is input displays the necessary display information acquired in S120 on the second display unit to form a virtual image VI_2.

Thereafter, the information display process is terminated, and the system waits for the next activation timing.
[Effects of Second Embodiment]
As described above, according to the information display device 2 of the present embodiment, the same effects as those of the information display device 1 of the first embodiment can be obtained.

In particular, according to the information display device 2, switching of the area where information is displayed can be realized with a single display.
[Other Embodiments]
As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it is possible to implement in various aspects.

  For example, in the information display device 1 of the first embodiment, the information acquisition unit 60 is the illuminance sensor 62, but the information acquisition unit 60 in the information display device 1 may be the imaging device 64. In this case, the processing content of S140 in the information display processing executed by the control device 40 of the information display device 1 is preferably the same processing content as S140 in the information display processing of the second embodiment.

  In the information display device 2 of the second embodiment, the information acquisition unit 60 is the imaging device 64. However, the information acquisition unit 60 in the information display device 2 may be an illuminance sensor 62. In this case, the processing content of S140 in the information display processing executed by the control device 40 of the information display device 2 is preferably the same processing content as S140 in the first embodiment.

  In the information display process of the first embodiment, the driver's pupil diameter corresponding to the illuminance is acquired based on the pupil diameter table in S140, and the user corresponding to the acquired pupil diameter is determined in S150. The user has specified the depth of field by specifying the depth of field based on the depth of field table. However, the identification method of the user depth of field in the first information display process is not limited to this. For example, in the information display process of the first embodiment, the user depth of field may be directly specified based on the illuminance. In this case, to specify the user depth of field, it is conceivable to use a table in which the illuminance and the user depth of field are associated.

  By the way, in 1st embodiment and 2nd embodiment, although virtual image VI_2 was formed under virtual image VI_1 along the vehicle height direction, the position where virtual image VI_2 is formed is in the vehicle height direction of virtual image VI_1. It is not restricted to the downward direction along. The position at which the virtual image VI_2 is formed may be, for example, either left or right along the vehicle width direction, or may be above the vehicle height direction of the virtual image VI_1.

In the latter case, the information displayed as the virtual image VI_2 is preferably a marker indicating a road sign. In this case, the virtual image VI_2 superimposed on the road sign can be displayed.
Moreover, in the said embodiment, although the mobile body in which an information display apparatus is mounted was used as the motor vehicle, the mobile body in which an information display apparatus is mounted is not restricted to a motor vehicle. The mobile body on which the information display device is mounted may be, for example, a railway vehicle, a ship, an aircraft, or the like.

  In addition, the aspect which abbreviate | omitted a part of structure of the said embodiment as long as the subject could be solved is also embodiment of this invention. Further, an aspect configured by appropriately combining the above embodiment and the modification is also an embodiment of the present invention. Moreover, all the aspects which can be considered in the limit which does not deviate from the essence of the invention specified by the wording described in the claims are the embodiments of the present invention.

  DESCRIPTION OF SYMBOLS 1, 2 ... Information display apparatus 4 ... Case 5 ... Dashboard 6 ... Projection member 10 ... Image projector 12 ... First display 14 ... Second display 15 ... Liquid crystal display 16 ... Optical part 18 ... Reflector 20 ... Lens 40 ... Control device 42 ... Storage device 44 ... Microcomputer 46 ... ROM 48 ... RAM 50 ... CPU 52 ... Navigation device 54 ... Driving support ECU 56 ... Perimeter monitoring device 60 ... Information acquisition unit 62 ... Illuminance sensor 64 ... Imaging device

Claims (7)

An information display device (1) that is mounted on a moving body, reflects light representing information on a projection member (6), and displays the information as a virtual image,
A point on the traveling direction that the user of the moving body should watch is a gazing point, is a region stipulated on the projection member, and is defined on a path from the user's eye to the gazing point First projection means (40, S170) for controlling the projection mechanism (10) so as to project the light representing the information onto the first display area, which is the area that has been created,
A depth specifying means (40, S130 to S150) for specifying a user depth of field representing a range of distance that the user's eyes can be regarded as being in focus with the first display area;
If the gaze distance representing the distance from the user's eye to the gazing point is outside the range of the user depth of field specified by the depth specifying means, it is an area defined for the projection member, The projection mechanism is arranged such that light representing the information is projected onto a second display area that is off the light path from the user toward the gazing point and is non-overlapping with the first display area. An information display device comprising: second projecting means (40, S160, S180) to be controlled. The projection mechanism is a single indicator (15) that emits light and outputs information,
In the display, a portion that emits light projected to the first display area is a first light emitting portion, and in the display, a portion that emits light projected to the second display area is a second light emitting portion. age,
The first projection means includes
Controlling the first light emitting unit so that light is projected onto the first display region;
The second projection means includes
The information display device according to claim 1, wherein the second light emitting unit is controlled such that light is projected onto the second display region. The projection mechanism has at least two or more indicators (12, 14) that emit light and output information;
The display that emits light projected on the first display area is a first display, the display that emits light projected on the second display area is a second display,
The first projection means includes
Controlling the first indicator so that light is projected onto the first display area;
The second projection means includes
The information display device according to claim 1, wherein the second display is controlled so that light is projected onto the second display area. The depth specifying means includes
A pupil diameter estimating means for estimating the pupil diameter of the user;
The information according to any one of claims 1 to 3, characterized in that the smaller the pupil diameter estimated by the pupil diameter estimating means, the deeper the user depth of field is specified. Display device. The pupil diameter estimating means includes
The information display device according to claim 4, wherein the illuminance around the moving body is specified, and the pupil diameter is estimated to be smaller as the specified illuminance is larger. If the gaze distance is within the range of the user depth of field, third projection means (40, S160, S170) for controlling the projection mechanism so that light irradiation to the first display area is maintained. The information display device according to any one of claims 1 to 5, further comprising: The second projection means includes
If the gaze distance is outside the range of the user depth of field, the projection mechanism is controlled so that light is emitted to the first display area for a predetermined time, and then the first The information display apparatus according to any one of claims 1 to 6, wherein the projection mechanism is controlled so that light is emitted to the two display areas.

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