JP2011121402A - Display device, display method, and movement body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a HUD (Head-Up Display) type display device, a display method and a movement body capable of easily performing observation even if the position of the eyes is moved. <P>SOLUTION: The display device is mounted on the movement body, reflects a luminous reflux including an image to a windshield part of the movement body and projects it to an observer getting on the movement body. The display device includes an image projection part for projecting the luminous reflux to one eye of the observer; and a control part for controlling a projection position of the luminous reflux at a position of the observer by controlling the image projection part. The control part moves the projection position of the luminous reflux in a direction that it is directed from the left eye of the observer to the right eye than the projection position of the luminous reflux when the movement body straightly advances when the advancement direction of the movement body is varied in a right direction. When the advancement direction of the movement body is varied in a left direction, the projection position of the luminous reflux is moved in a direction that it is directed from the right eye of the observer to the left eye than the projection position of the luminous reflux when the movement body straightly advances. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device, a display method, and a moving object.

  In an in-vehicle head-up display (HUD), display information such as navigation information is projected onto a windshield, and external information and display information are simultaneously viewed. In the binocular HUD, binocular parallax occurs between the external information and the display information, and the display is difficult to see.

  On the other hand, a monocular display device in which the display is viewed with one eye has been proposed (see, for example, Patent Document 1). According to this, a virtual image of a display object can be perceived at a depth position matching the background, and a display with enhanced depth and stereoscopic effect can be provided.

  Such a monocular display device can be applied to, for example, a vehicle-mounted HUD, and binocular parallax does not occur even when external information and display information are viewed at the same time, and displays at a desired depth position. Can be perceived.

  In addition, such a display device that is viewed with one eye can be applied to an amusement application such as a game in addition to a vehicle-mounted HUD, and a sense of depth and a three-dimensional effect can be enhanced to provide a highly realistic display.

  In a monocular display device, a projection area of a light beam including display contents is controlled to be narrow so that the display is not always viewed with both eyes. For this reason, there is room for improvement in order to facilitate viewing even if the position of the eyes of the viewer moves.

JP 2009-128565 A

  The present invention provides a HUD type display device, a display method, and a moving body that can be easily viewed even if the position of the eye moves.

  According to one aspect of the present invention, there is provided a display device that is mounted on a moving body and projects a light beam including an image on a windshield portion of the moving body and projected toward a viewer riding on the moving body. An image projection unit that projects the light beam toward the viewer, and a control unit that controls the image projection unit to control the projection position of the light beam at the position of the viewer, When the traveling direction of the moving body changes to the right, the control unit projects the light flux in a direction from the left eye of the viewer toward the right eye rather than the projection position of the light flux when the moving body travels straight. When the moving direction of the moving body changes to the left, the position of the moving body changes to the left, and the direction from the right eye of the viewer toward the left eye is greater than the projection position of the luminous flux when the moving body moves straight. Moving the projection position of the luminous flux; Display apparatus is provided, wherein.

  According to another aspect of the present invention, there is provided a display method for projecting a light beam including an image on a windshield portion of a moving body and projecting it toward a viewer riding on the moving body. When the advancing direction changes to the right, the projection position of the light beam is moved in a direction from the left eye of the viewer toward the right eye, rather than the projection position of the light beam when the moving body goes straight. The projection position of the light beam is moved in the direction from the right eye of the viewer toward the left eye, rather than the projection position of the light beam when the moving body moves straight when A display method is provided.

  According to another aspect of the present invention, the movement includes: the display device; and a windshield portion that reflects the light beam emitted from the display device toward the viewer. The body is provided.

  ADVANTAGE OF THE INVENTION According to this invention, even if the position of eyes moves, the HUD type display apparatus, display method, and mobile body which are easy to see are provided.

It is a schematic diagram which illustrates operation | movement of a display apparatus. It is a schematic diagram which illustrates another operation | movement of a display apparatus. It is a schematic diagram which illustrates the structure of a display apparatus. It is a graph which illustrates the position of a viewer's eye when changing the advancing direction of a vehicle. It is a schematic diagram which illustrates operation | movement of a display apparatus. It is a schematic diagram which illustrates operation | movement of a display apparatus. It is a schematic diagram which illustrates operation | movement of a display apparatus. It is a schematic diagram which illustrates operation | movement of a display apparatus. It is a graph which illustrates operation | movement of a display apparatus. It is a graph which illustrates another operation | movement of a display apparatus. It is a schematic diagram which illustrates the structure of a display apparatus. It is a flowchart figure which shows a display method.

Embodiments of the present invention will be described below with reference to the drawings.
Note that, in the present specification and each drawing, the same elements as those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.

(First embodiment)
The display device according to the first embodiment of the present invention is a display device that can be viewed with one eye. In addition to an in-vehicle HUD, a simulator such as a driving simulator or a flight simulator, and also an amusement application such as a game. It can be applied to enhance the sense of depth and stereoscopic effect and provide a highly realistic display. Below, the display apparatus which concerns on this embodiment as an example demonstrates as a case where it applies as HUD which is a vehicle-mounted display apparatus.

FIG. 1 is a schematic view illustrating the operation of the display device according to the first embodiment.
FIG. 2 is a schematic view illustrating another operation of the display device according to the first embodiment.
FIG. 3 is a schematic view illustrating the configuration of the display device according to the first embodiment.
First, the outline of the configuration of the display device 10 according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 3, the display device 10 is mounted on a vehicle 730 (moving body). The display device 10 reflects the light beam 112 including the image to the windshield 710 of the vehicle 730 and projects it toward the viewer 100 who is on the vehicle 730. Windshield portion 710 includes the windshield of vehicle 730. Moreover, the windshield part 710 may also include the reflection part 711 (for example, combiner) provided in the windshield of the vehicle 730, for example. In this case, the light beam 112 is reflected by the reflecting portion 711 provided on the windshield of the vehicle 730 and reflected toward the viewer 100. In addition, the reflection part 711 may be provided in the indoor side of the vehicle 730 rather than the windshield, and spaced apart from the windshield. Even when the reflection part 711 is provided apart from the windshield, the reflection part 711 is regarded as a part of the windshield part 710.

The display device 10 includes a video projection unit 115 and a control unit 250.
The video projection unit 115 projects the light beam 112 including the video toward the one eye 101 of the viewer 100. The control unit 250 controls the image projection unit 115 to control the projection position 114 a of the light beam 112 at the position of the viewer 100.

  Note that the image included in the light flux 112 includes, for example, the display object 180. The display object 180 is provided in an image that the display device 10 presents to the viewer 100. For example, various display items such as “arrows” indicating the traveling direction regarding the operation information of the vehicle 730 on which the display device 10 is mounted. Is the display content.

  The light beam 112 emitted from the video projection unit 115 is reflected by the windshield unit 710 and enters the head 105 of the viewer 100. At this time, the divergence angle of the light beam 112 is controlled, and the light beam 112 enters the one eye 101 of the viewer 100. Thereby, the human viewer 100 views the video information included in the light flux 112 with one eye 101.

  The windshield unit 710 is disposed at a position where the distance from the viewer 100 is 21.7 cm or more. As a result, the effect described in Patent Document 1 enhances the sense of depth perceived by the viewer 100 and allows the display object 180 to be perceived at a desired depth position. In a head-mounted display (HMD), an image may be presented to one eye (monocular), but an image by a display unit arranged in the very vicinity of the eye (position closer to 21.7 cm) is displayed. It only perceives, and cannot display a high sense of presence with a sense of depth.

  As illustrated in FIG. 3, the display device 10 can be provided, for example, in the vehicle 730, that is, for example, at the back of the dashboard 720 of the vehicle 730 when viewed from the human viewer 100 who is the operator. . Further, the human viewer 100 operates the handle 731 (steering, steering device) of the vehicle 730 to control the traveling direction of the vehicle 730.

  The video projection unit 115 includes, for example, a video data generation unit 130, a video formation unit 110, and a projection unit 120.

  The video data generation unit 130 generates a video signal corresponding to the video including the display object 180 and supplies the video signal to the video formation unit 110.

  As the image forming unit 110, for example, an optical switch such as a liquid crystal display (LCD) can be used. Then, the video forming unit 110 forms a video on the screen of the video forming unit 110 based on the video signal supplied from the video data generating unit 130.

On the other hand, for example, various light sources, lenses, mirrors, and various optical elements that control the divergence angle (diffusion angle) are used for the projection unit 120.
In this specific example, the projection unit 120 includes a light source 121, a tapered light guide 122, a light source side lens 123, an aperture 124, an exit side lens 125, and an exit side mirror 126.

  The light source 121 generates light that becomes the light flux 112. A tapered light guide 122 is disposed between the light source 121 and the exit side mirror 126 along the traveling direction of the light that becomes the light beam 112, and a light source side lens 123 is disposed between the taper light guide 122 and the exit side mirror 126. The aperture 124 is disposed between the light source side lens 123 and the exit side mirror 126, and the exit side lens 125 is disposed between the aperture 124 and the exit side mirror 126.

  In this specific example, an image forming unit 110 (for example, LCD) is disposed between the taper light guide 122 and the light source side lens 123.

  As the light source 121, various types such as an LED (Light Emitting Diode), a high-pressure mercury lamp, a halogen lamp, and a laser can be used. By using an LED for the light source 121, power consumption can be reduced, and the apparatus can be reduced in weight and size.

  Each configuration of the video data generation unit 130, the video formation unit 110, and the projection unit 120 can be variously modified. Arrangement of the elements included in the image forming unit 110 and the elements included in the projection unit 120 is arbitrary. For example, between the elements included in the projection unit 120, the image forming unit 110 (and elements included in the image forming unit 110). ) May be inserted.

  The light emitted from the light source 121 is controlled to have a divergence angle within a certain range in the taper light guide 122. Then, the light passes through the image forming unit 110 and becomes a light beam 112 including an image including a predetermined display object 180.

  In this specific example, the exit-side mirror 126 has a concave shape, so that the image of the video information included in the light beam 112 can be enlarged and projected to the viewer 100.

  As shown in FIG. 3, the light beam 112 is reflected by the output side mirror 126, then reflected by the windshield unit 710 of the vehicle 730, and reaches the one eye 101 of the viewer 100.

  The human viewer 100 perceives the image 181 (virtual image) of the display object 180 formed at the image forming position 181p through the windshield unit 710. Thus, the display device 10 can be used as a HUD.

The exit side mirror 126 can be movable. For example, the position and angle of the exit side mirror 126 can be adjusted manually or automatically in accordance with the position and movement of the head 105 of the viewer 100. With adjustment, the light beam 112 can be appropriately projected onto the one eye 101.
The video projection unit 115 can be variously modified in addition to the above specific examples.

  Since the display device 10 is a display device that is viewed with one eye 101, the spread of the light beam 112 is controlled so that it is not always viewed with both eyes, and the center of the light beam 112 is projected onto the one eye 101 and not projected onto both eyes. . The size of the projection area 114 of the light beam 112 at the position of the viewer 100 is set so that only one eye 101 enters and both eyes do not enter. Since the distance between both eyes (pupils) of the viewer 100 is, for example, 60 millimeters (mm) to 75 mm, the size (width in the left-right direction) of the projection region 114 of the light beam 112 at the position of the viewer 100 is For example, it is set to about 60 mm to 75 mm or less. The size of the projection region 114 is mainly controlled by an optical element included in the projection unit 120.

The control unit 250 controls the video projection unit 115 to control the projection position 114a of the light beam 112 at the position of the viewer 100 (the position of the projection region 114).
For example, the control unit 250 includes a control signal unit 251 and a drive unit 126a. The control signal unit 251 outputs a control signal to the drive unit 126a to operate the drive unit 126a. The drive unit 126a includes, for example, a motor that changes the angle, position, and the like of the output side mirror 126. The drive unit 126a is operated by the control signal output from the control signal unit 251 to change the angle and position of the exit side mirror 126 and change the projection position 114a of the light beam 112 at the position of the viewer 100. The drive unit 126a may be considered to be included in the video projection unit 115. In this specific example, the control unit 250 further includes a detection unit 252 described later.

  In the display device 10 according to the present embodiment, the control unit 250 controls the projection position 114a of the projection area 114 of the light beam 112 according to the change in the traveling direction of the vehicle 730. Below, in order to demonstrate easily, the case where the advancing direction of the vehicle 730 changes is demonstrated as a case where it is a right turn or a left turn.

  That is, according to the inventor's experiment, when the vehicle 730 turns to the right, the head 105 of the viewer 100 moves to the right rather than when traveling straight, and the position of the one eye 101 to be viewed is higher than when traveling straight. Move to the right. When the vehicle 730 turns to the left, the head 105 of the viewer 100 moves to the left than when traveling straight, and the position of the one eye 101 to be viewed moves to the left than when traveling straight. The control unit 250 controls the projection position 114 a of the projection area 114 of the light beam 112 so as to correspond to the position of the one eye 101 of the viewer 100. The above experimental results will be described later.

Hereinafter, the operation of the control unit 250 will be described.
FIG. 1A, FIG. 1B, and FIG. 1C illustrate the operation of the display device 10 when the light flux 112 is projected onto the viewer's right eye 101R. 1 (a), 1 (b), and 1 (c) illustrate the operation of the display device 10 when the vehicle 730 is traveling straight, turning right, and turning left, respectively. ing.

  As illustrated in FIG. 1A, when the vehicle 730 is traveling straight, the display device 10 projects a light beam 112 onto the right eye 101 </ b> R of the viewer 100. That is, the position of the right eye 101R is located within the range of the projection area 114 of the light beam 112. As described above, the control unit 250 of the display device 10 controls the projection position 114 a of the light beam 112.

The projection position 114a when the vehicle 730 is traveling straight is defined as a straight-projection position 114o that is a reference position.
Then, as illustrated in FIG. 1A, the traveling direction of the vehicle 730 is defined as the Z direction. And let the left-right direction of the vehicle 730 be the X direction. The vertical direction of the vehicle 730 is defined as the Y direction.

When the vehicle 730 is traveling straight, the Z direction coincides with the front direction of the viewer 100. When the viewer 100 is facing the front, the X direction coincides with the left-right direction of the viewer 100. The Y direction coincides with the vertical direction of the viewer 100.
Here, the positive direction in the X direction is the direction from the left eye 101L of the viewer toward the right eye 101R. The negative direction of the X direction is a direction from the viewer's right eye 101R toward the left eye 101L.

  As shown in FIG. 1B, when the vehicle 730 turns to the right, the head 105 of the human viewer 100 moves to the right than when traveling straight. Along with this, the position of the right eye 101R of the viewer 100 moves to the right than when traveling straight, but the light flux 112 can be incident on the left eye 101L of the viewer 100, so that the viewer 100 views the video. Can be seen. For this reason, the controller 250 does not move the projection position 114a of the light beam 112. Alternatively, in accordance with the movement of the right eye 101R, the control unit 250 may move the projection position 114a of the light beam 112 to the right than when traveling straight.

  As shown in FIG. 1C, when the vehicle 730 turns left, the head 105 of the human viewer 100 moves to the left rather than straight ahead. Along with this, the position of the right eye 101R to be viewed moves to the left than when traveling straight. Corresponding to this movement, the control unit 250 moves the projection position 114a of the light beam 112 to the left rather than when traveling straight.

Further, when the viewer 100 views with the left eye, the display device 10 performs the same operation.
2A, 2B, and 2C illustrate the operation of the display device 10 when the luminous flux 112 is projected onto the left eye 101L of the viewer. 2 (a), 2 (b), and 2 (c) illustrate the operation of the display device 10 when the vehicle 730 is traveling straight, turning right, and turning left, respectively. ing.

  As illustrated in FIG. 2A, when the vehicle 730 is traveling straight, the display device 10 projects a light beam 112 onto the left eye 101 </ b> L of the viewer 100. Also at this time, the projection position 114a when the vehicle 730 illustrated in FIG. 2A is traveling straight is the straight traveling projection position 114o that is the reference position.

  As shown in FIG. 2B, when the vehicle 730 turns to the right, the head 105 of the human viewer 100 moves to the right than when traveling straight. Along with this, the position of the left eye 101L to be viewed moves in the right direction as compared to when traveling straight. Corresponding to this movement, the control unit 250 moves the projection position 114a of the light beam 112 to the right as compared to when traveling straight.

  As shown in FIG. 2C, when the vehicle 730 turns to the left, the head 105 of the viewer 100 moves to the left rather than straight ahead. Along with this, the position of the left eye 101L of the viewer 100 moves to the left than when traveling straight, but the light flux 112 can enter the right eye 101R of the viewer 100, so that the viewer 100 views the video. Can be seen. For this reason, the controller 250 does not move the projection position 114a of the light beam 112. Alternatively, in correspondence with the movement of the right eye 101R, the control unit 250 may move the projection position 114a of the light beam 112 to the left rather than when traveling straight.

  In this way, when the traveling direction of the vehicle 730 changes to the right, the control unit 250 causes the left eye of the viewer 100 to move more than the projection position of the light beam 112 when the vehicle 730 travels straight (projection position 114o when traveling straight). The projection position 114a of the light beam 112 is moved in the direction from 101L toward the right eye 101R (positive direction in the X direction). Then, when the traveling direction of the vehicle 730 changes to the left, the control unit 250 causes the right eye 101R of the viewer 100 to move more than the projection position of the light beam 112 when the vehicle 730 travels straight (projection position 114o when traveling straight). The projection position 114a of the light beam 112 is moved in a direction toward the left eye 101L (a negative direction in the X direction).

  In particular, when the traveling direction of the vehicle 730 changes to the right, the control unit 250 causes the light beam 112 when the vehicle 730 travels straight when the light beam 112 is projected onto the left eye 101L when the vehicle 730 travels straight. The projection position 140a of the light beam 112 is moved in the direction from the left eye 101L to the right eye 101R of the viewer 100 with respect to the projection position 140a. Then, when the traveling direction of the vehicle 730 changes to the left, the control unit 250 causes the light beam 112 when the vehicle 730 travels straight when the light beam 112 is projected onto the right eye 101R when the vehicle 730 travels straight. The projection position 140a of the light beam 112 is moved in the direction from the right eye 101R to the left eye 101L of the viewer 100 with respect to the projection position 140.

  Thereby, when the position of the one eye 101 of the viewer 100 moves when the vehicle 730 changes the traveling direction, the viewer 100 can easily view.

  The time when the traveling direction of the vehicle 730 changes to the right direction is, for example, a case where there is a branch on the currently traveling road and the course of the vehicle 730 is changed to a road extending rightward from the branch. . In addition, for example, when traveling on a straight road, when the road turns to the right and the traveling direction of the vehicle 730 is changed along the curvature of the road, the traveling direction of the vehicle 730 changes to the right. Included when The same applies to the left direction.

  In the following, for the sake of simplification, when the traveling direction of the vehicle 730 changes to the right direction or the left direction, there is a branch on the currently traveling road, and the right direction or the left direction extends from the branch. In the following description, it is assumed that the route of the vehicle 730 is changed to the road to be changed. That is, when the traveling direction of the vehicle 730 changes to the right, the vehicle 730 makes a right turn, and when the traveling direction of the vehicle 730 changes to the left, it means when the vehicle 730 makes a left turn. explain.

  As illustrated in FIGS. 1B and 1C and FIGS. 2B and 2C, with respect to the projection position of the light beam 112 when the vehicle 730 travels straight (projection position 114o during straight travel), A distance by which the projection position 114a of the light beam 112 is moved when making a right turn or a left turn is defined as a movement distance Lx.

  In the following, the projection position 140a of the light beam 112 is moved when the traveling direction is changed in the right direction or the left direction regardless of whether the light beam 112 is projected onto the right eye 101R or the left eye 101L when traveling straight. As described above, as described above, when the light beam 112 is projected onto the right eye 101R during straight travel, when the traveling direction is changed to the right, the projection position 140a of the light beam 112 is not moved and the vehicle travels straight. At this time, when the traveling direction is changed in the left direction when the light beam 112 is projected on the left eye 101L, the projection position 140a of the light beam 112 cannot be moved. In this case, the moving distance Lx of the light beam 112 is zero. is there.

  When the light beam 112 is projected onto the right eye 101R of the viewer 100, the first movement distance LxRR that moves the projection position 114a of the light beam 112 when the traveling direction is changed in the right direction and the right eye 101R of the viewer 100 are displayed. When projecting the light beam 112, when projecting the light beam 112 to the second movement distance LxRL for moving the projection position 114a of the light beam 112 when the traveling direction is changed to the left direction and the left eye 101L of the viewer 100, When the light beam 112 is projected onto the third movement distance LxLR for moving the projection position 114a of the light beam 112 when the traveling direction is changed to the right direction and the left eye 101L of the viewer 100, the traveling direction is changed to the left direction. The fourth movement distance LxLL for moving the projection position 114a of the luminous flux 112 may be different from each other.

  The first movement distance LxRR, the second movement distance LxRL, the third movement distance LxLR, and the fourth movement distance LxLL are, for example, specifications of the vehicle 730 (for example, the viewer 100 is on the right side or the left side of the vehicle 730). Or the like), the conditions of the road on which the vehicle 730 travels (for example, right-hand traffic or left-hand traffic), and the characteristics and preferences of the viewer 100, etc., are set appropriately.

Hereinafter, a change in the position of the one eye 101 of the human viewer 100 when the vehicle 730 changes the traveling direction to the left or when the traveling direction changes to the right will be described.
The inventor measured the change in the position of one eye 101 of the viewer 100 who steers the vehicle 730 when the vehicle 730 turns right or left at an intersection or the like and when the vehicle 730 travels on a curved road. An experiment was conducted. In this experiment, a total of 42 subjects (viewers 100) steer the vehicle 730, and from the state where the vehicle 730 is going straight, turn right or in the direction of about 90 degrees from the straight direction such as an intersection. Images of the head 105 of the viewer 100 at the time of turning left and at the corner when the vehicle 730 travels on a curved road were captured, and the change in the position of the one eye 101 was detected from the captured images. At this time, the position of the one eye 101 is set to the position of the right eye 101R for convenience, but the position of the left eye 101L is linked to the position of the right eye 101R, and the change of the position of the one eye 101 is the change of the position of the left eye 101L. May be considered.

  FIG. 4 is a graph illustrating the positions of the eyes of the viewer when changing the traveling direction of the vehicle. That is, FIG. 10A shows a change in the position of one eye 101 of the viewer 100 when the vehicle 730 makes a right turn, and FIG. 10B shows the one eye 101 of the viewer 100 when the vehicle 730 makes a left turn. Represents the change in position. In these drawings, the horizontal axis represents the eye movement distance Dex at the position of one eye 101. The position where the horizontal axis is zero is the position of the one eye 101 when traveling straight. If the value of the horizontal axis is positive, the one eye 101 has moved in the right direction (positive direction in the X direction). The negative case corresponds to the movement of the one eye 101 in the left direction (negative direction in the X direction). The vertical axis in these figures represents the occurrence frequency NL.

  As shown in FIG. 4A, when the vehicle 730 turns right, the eye movement distance Dex at the position of the one eye 101 showed a positive value. That is, when the vehicle 730 makes a right turn, the one eye 101 of the human viewer 100 moves in the right direction with respect to straight travel. In this experiment, the average eye movement distance Dex is about 28 mm.

  As shown in FIG. 4B, when the vehicle 730 turns left, the eye movement distance Dex at the position of the one eye 101 showed a negative value. That is, when the vehicle 730 turns to the left, the one eye 101 of the viewer 100 moves in the left direction with respect to straight travel. In this experiment, the average eye movement distance Dex is about 55 mm.

  When the vehicle 730 turns right or left, the head 105 of the viewer 100 moves in the Y direction when the eye position of the viewer 100 moves rightward or leftward from when the vehicle 730 is moving straight. It has also been found that the head 105 and the upper body of the viewer 100 are often tilted in addition to rotating around the axis.

  Thus, the position of the eyes of the operator who is the viewer 100 moves straight when the vehicle 730 makes a right turn (the advancing direction changes to the right) or a left turn (the advancing direction changes to the left). Move from when you are. Such experimental results regarding human characteristics have been found by this experiment of the inventor.

  In a monocular HUD in which the projection area 114 of the light beam 112 is controlled to be narrow, when the vehicle 730 turns right or left, if the eye position moves from the eye position when the vehicle is moving straight, It becomes difficult for the person 100 to view the image included in the luminous flux 112. As described above, a new problem has been found for the first time that can be a problem when actually using a monocular HUD.

  The present invention has been made in order to address the above-mentioned phenomenon newly found with respect to human characteristics, and the practical problem of a monocular HUD newly found in connection with the phenomenon. is there.

  That is, the projection position 114a of the light beam 112 is moved from the straight traveling projection position 114o when traveling straight, corresponding to a right turn or a left turn of the vehicle 730. Accordingly, when the vehicle 730 makes a left turn or a right turn, even if the position of the one eye 101 of the viewer 100 moves, it can be easily viewed.

  Note that the movement distance Lx when the projection position 114a of the light beam 112 is moved from the straight projection position 114o when going straight in correspondence with a right turn or a left turn of the vehicle 730 is, for example, FIGS. 4 (a) and 4 (b). It can be determined on the basis of the experimental results exemplified in. Thereby, even if the position of the one eye 101 of the human viewer 100 moves, it is easier to view.

  For example, the moving distance Lx when moving the projection position 114a of the light beam 112 from the straight traveling projection position 114o during straight traveling can be greater when turning left than when turning right.

  4 (a) and 4 (b), the absolute value of the eye movement distance Dex of one eye 101 is larger in FIG. 4 (b) when turning left than in FIG. 4 (a) when turning right. . Thus, this characteristic is asymmetric in the left-right direction. In the specific example, when the vehicle is traveling straight in the experiment, the vehicle 730 travels on the left side of the traveling road, so the direction of travel changes when turning left compared to when turning right. This is thought to be related to the fact that the turning radius was reduced. Further, the vehicle 730 used in this experiment is a vehicle having a handle on the right side, and this is considered to be related to the above asymmetry. Further, when the traveling direction is changed to the right direction, the influence of the pillar supporting the roof of the vehicle 730 may be considered, which may cause the above asymmetry.

  Accordingly, the distance traveled when the projection position 114a of the light beam 112 is moved from the straight projection position 114o when traveling straight in correspondence with the right or left turn of the vehicle 730 is whether the vehicle 730 to be used travels on the right side of the road. It can be set appropriately based on the left side or the position where the handle is attached.

  Further, the movement distance Lx when the projection position 114a of the light beam 112 is moved from the straight projection position 114o during straight travel may be a distance of 60 mm or greater and 75 mm or less, which is the pupil interval. Accordingly, the human characteristics illustrated in FIGS. 4A and 4B are substantially compensated, and viewing can be facilitated when the position of one eye 101 of the viewer 100 moves.

  By the way, for example, the position of the one eye 101 of the viewer 100 is detected using an imaging device (camera) or the like, and the control unit 250 interlocks with the detected position of the one eye 101 to project the projection position 114a of the light beam 112. May be controlled. However, if a camera or the like that detects the position of the one eye 101 of the viewer 100 is installed, the cost of the apparatus increases. Therefore, it is not always necessary to detect the position of the one eye 101 of the viewer 100.

  That is, as illustrated in FIGS. 4A and 4B, as a human characteristic, when making a right or left turn, the eye movement distance Dex at the position of the one eye 101 from when traveling straight has a specific distribution. Thus, the projection position 114a of the light beam 112 can be controlled using this characteristic.

  That is, the traveling direction of the vehicle 730 is detected without strictly measuring the position of the one eye 101 of the viewer 100, and based on the detection result, the moving direction and the eye moving distance of the one eye 101 of the viewer 100 are detected. Dex can be estimated and the projection position 114a of the light beam 112 can be controlled.

  Control is performed to change whether the projection position 140a of the light beam 112 is moved when the right eye 101R or the left eye 101L is viewed when the vehicle is traveling straight and the traveling direction is turned right or left. In this case, information about the one eye 101 that is being viewed while traveling straight can be obtained by various methods. For example, the viewer 100 as the operator may input whether the right eye 101R or the left eye 101L is the initial setting at the start of driving of the vehicle 730. Also, for example, the position at which the projection position 140a of the light beam 112 is projected at the time of initial setting is detected in comparison with the center axis of the seat, and the right eye 101R is the one eye 101 that is viewed when traveling straight. The left eye 101L may be estimated. Alternatively, the head 105 of the human viewer 100 may be imaged during driving, and it may be estimated from the image whether the one eye 101 that is viewing when traveling straight is the right eye 101R or the left eye 101L.

Hereinafter, detection of the traveling direction of the vehicle 730 will be described.
FIG. 5 is a schematic view illustrating the operation of the display device according to the first embodiment.
That is, FIGS. 9A, 9B, and 9C illustrate an example of a method for detecting the traveling direction of the vehicle 730 in the display device 10. FIG. That is, in this example, the case where the traveling direction of the vehicle 730 is detected by the steering angle of the handle 731 of the vehicle 730 is illustrated. (A), (b), and (c) of the figure illustrate the state of the handle 731 when the vehicle 730 goes straight, turns right, and turns left, respectively.

  As shown in FIG. 5A, when the vehicle 730 is traveling straight, the shaft 731a of the handle 731 is perpendicular to the X direction (may be perpendicular to the Y direction). The position of the shaft 731a of the handle 731 when traveling straight is set as a reference angle 731ao.

  As illustrated in FIG. 5B, when the vehicle 730 turns right, the shaft 731 a of the handle 731 rotates clockwise from the straight travel time. That is, the steering angle θs of the handle 731 is a positive value.

  As illustrated in FIG. 5C, when the vehicle 730 turns left, the shaft 731 a of the handle 731 rotates counterclockwise from the straight traveling time. That is, the steering angle θs of the handle 731 is a negative value.

  Thus, the traveling direction of the vehicle 730 is detected by the steering angle θs of the handle 731 of the vehicle 730.

  At this time, when the steering angle θs is smaller than a certain value, the vehicle 730 is set to be regarded as traveling straight. For example, the steering angle θs is not zero even when the vehicle is traveling straight due to play of the handle 731 during driving. In addition, the steering angle θs is small when changing the lane in which the vehicle is traveling instead of turning right or left, and in such a case, the steering angle θs is set so as not to be considered as changing the traveling direction.

  For example, when the absolute value of the steering angle θs is 45 degrees or more, the traveling direction is changed and set to turn right or left. When the absolute value of the steering angle θs is 45 degrees or more, the projection area 114 of the light beam 112 can be set to move from the straight traveling time. As described above, a threshold value can be provided for determining that the traveling direction is changed (right turn or left turn) with respect to the steering angle θs.

  Further, based on not only the absolute value of the steering angle θs but also the traveling speed of the vehicle 730, the threshold value for determining that the traveling direction is to be changed (right turn or left turn) may be changed. For example, when the traveling speed of the vehicle 730 is high, the viewer 100 can easily face the front, and therefore the position of the one eye 101 of the viewer 100 is difficult to move from when traveling straight. On the other hand, when the traveling speed of the vehicle 730 is slow, the position of the one eye 101 of the human viewer 100 is likely to move from the straight traveling time. In such a case, by combining the absolute value of the steering angle θs and the traveling speed of the vehicle 730, the threshold value for the steering angle θs that is determined to change the traveling direction (right turn or left turn) is changed. Also good. For example, when the absolute value of the steering angle θs is 45 degrees, it has been confirmed that it can be distinguished from the case of lane change when traveling on a road having a plurality of lanes (traffic portions).

FIG. 6 is a schematic view illustrating the operation of the display device according to the first embodiment.
That is, FIGS. 9A, 9B, and 9C illustrate an example of a method for detecting the traveling direction of the vehicle 730 in the display device 10. FIG. That is, in this example, the case where the traveling direction of the vehicle 730 is detected by a lateral force applied to the vehicle 730 (a lateral acceleration) is illustrated. (A), (b), and (c) of the figure illustrate lateral forces (acceleration in the left-right direction) applied to the vehicle 730 when the vehicle 730 goes straight, turns right, and turns left, respectively.

  As shown in FIG. 6A, when the vehicle 730 is traveling straight, no lateral force is applied to the vehicle 730.

  As shown in FIG. 6B, when the vehicle 730 turns to the right, a lateral force Fh (that is, acceleration in the left-right direction) is applied to the vehicle 730 outward by a centrifugal force. Is done.

  As shown in FIG. 6C, when the vehicle 730 turns left, a lateral force Fh (that is, acceleration in the left-right direction) is applied to the vehicle 730 outward by a centrifugal force. Is done.

  The traveling direction of the vehicle 730 can be detected by detecting such a lateral force Fh (that is, acceleration in the left-right direction) using, for example, an accelerometer.

  At this time, when the lateral force Fh (lateral acceleration) is smaller than a certain value, the vehicle 730 is set to be regarded as traveling straight. In this way, a threshold value can be provided for determining that the traveling direction is changed (right turn or left turn) with respect to the lateral force Fh. Further, based on not only the lateral force Fh (lateral acceleration) but also the traveling speed of the vehicle 730, the lateral force Fh (lateral acceleration) is determined to change the traveling direction (right turn or left turn). ) May be changed.

FIG. 7 is a schematic view illustrating the operation of the display device according to the first embodiment.
That is, FIGS. 9A, 9B, and 9C illustrate an example of a method for detecting the traveling direction of the vehicle 730 in the display device 10. FIG. That is, in this example, a case where the traveling direction of the vehicle 730 is detected by a change in the posture of the viewer 100 is illustrated. (A), (b), and (c) illustrate the change in the posture of the viewer 100 when the vehicle 730 goes straight, turns right, and turns left, respectively.

  As shown in FIG. 7A, when the vehicle 730 is traveling straight, the viewer 100 is seated straight on the seat.

  As illustrated in FIG. 7B, when the vehicle 730 turns right, the head 105 of the human viewer 100 moves to the right side, which is the inner side of the turning direction. That is, the posture of the viewer 100 is tilted to the right.

  As shown in FIG. 7C, when the vehicle 730 turns left, the head 105 of the viewer 100 moves to the left, which is the inner side in the turning direction. That is, the posture of the viewer 100 is tilted leftward.

  Such a change in the posture of the viewer 100 can be obtained based on, for example, an image of the viewer 100 taken by a camera or the like. At this time, detecting the change in the posture of the viewer 100 can be performed relatively easily because the accuracy may be lower than detecting the position of the one eye 101 of the viewer 100. Further, the posture of the viewer 100 can be detected from the result of detecting the position of the body of the viewer 100 by a sensor or the like provided on the seat. Thereby, the traveling direction of the vehicle 730 can be estimated and detected from the change in the posture of the human viewer 100.

  At this time, if the change in the posture of the viewer 100 is smaller than a certain value, the vehicle 730 is set to be regarded as traveling straight. As described above, a threshold value for determining that the traveling direction is changed (right turn or left turn) with respect to the change in the posture of the viewer 100 can be provided. Further, based on not only the change in the posture of the viewer 100 but also the travel speed of the vehicle 730, a threshold value related to the change in the posture of the viewer 100 determined to change the traveling direction (right turn or left turn) is determined. It may be changed.

FIG. 8 is a schematic view illustrating the operation of the display device according to the first embodiment.
That is, FIGS. 9A, 9B, and 9C illustrate an example of a method for detecting the traveling direction of the vehicle 730 in the display device 10. FIG. That is, in this example, a case where the traveling direction of the vehicle 730 is detected by a change in the position of the center of gravity of the viewer 100 is illustrated. (A), (b), and (c) illustrate the change in the position of the center of gravity of the viewer 100 when the vehicle 730 goes straight, turns right, and turns left, respectively.

  As shown in FIG. 8A, when the vehicle 730 is traveling straight, the viewer 100 is seated straight on the seat. The position of the center of gravity Cg of the viewer 100 at this time is set as a reference position. That is, for example, the load Fg corresponding to the position of the center of gravity Cg of the viewer 100 is applied to the center position of the seat where the viewer 100 is seated.

  As shown in FIG. 8B, when the vehicle 730 turns right, the body of the viewer 100 tilts to the right, which is the inner side of the turning direction, and the center of gravity Cg of the viewer 100 moves to the right. . Then, a load Fg corresponding to the position of the center of gravity Cg of the viewer 100 is applied to the right side of the reference position.

  As shown in FIG. 8C, when the vehicle 730 turns to the left, the body of the viewer 100 tilts to the left, which is the inner side of the turning direction, and the center of gravity Cg of the viewer 100 moves to the left. . Then, a load Fg corresponding to the position of the center of gravity Cg of the viewer 100 is applied to the left side of the reference position.

  Such a change in the position of the center of gravity Cg of the viewer 100 can be detected by, for example, a sensor provided in a seat on which the viewer 100 is seated. Accordingly, the traveling direction of the vehicle 730 can be estimated and detected from the change in the position of the center of gravity Cg of the human viewer 100.

  At this time, when the change in the position of the center of gravity Cg of the human viewer 100 is smaller than a certain value, the vehicle 730 is set to be regarded as traveling straight. As described above, a threshold value for determining that the traveling direction is changed (right turn or left turn) with respect to the change in the position of the center of gravity Cg of the human viewer 100 can be provided. Further, based on not only the change in the position of the center of gravity Cg of the viewer 100 but also the travel speed of the vehicle 730, the position of the center of gravity Cg of the viewer 100 determined to change the traveling direction (right turn or left turn). The threshold for change may be changed.

  Further, the traveling direction of the vehicle 730 in the display device 10 includes the steering angle θs of the handle 731, the lateral force Fh (lateral acceleration) applied to the vehicle 730, the change in the posture of the viewer 100, and the viewing direction. You may detect based on what combined arbitrary 2 or more selected from the change of the position of the gravity center of the viewer 100. FIG.

  As described with reference to FIG. 3, the control unit 250 can include a detection unit 252 that detects the traveling direction of the vehicle 730. The detection unit 252 includes a steering angle θs of the handle 731 of the vehicle 730, a lateral acceleration (lateral force Fh) applied to the vehicle 730, a change in posture of the viewer 100, and a center of gravity Cg of the viewer 100. The traveling direction of the vehicle 730 can be detected based on the detection result of at least one of the position changes.

  Based on the traveling direction of the vehicle 730 thus detected, the projection position 114a of the light beam 112 is controlled as described above and moved in correspondence with the right or left turn of the vehicle 730.

  In the above description, the detection unit 252 is included in the control unit 250. However, a detection unit having the same function as that of the detection unit 252 may be provided separately from the control unit 250. Further, the constituent elements included in the video projection unit 115, such as the video data generation unit 130, may include a detection unit having the same function as the detection unit 252. In addition to the display device 10, a detection unit having the same function as that of the detection unit 252 is provided, and the control unit 250 obtains the detection result of the change in the traveling direction of the vehicle 730 by the detection unit. May be performed.

Below, the example of control of the projection position 114a of the light beam 112 is demonstrated.
Hereinafter, as an example, a case where the traveling direction of the vehicle 730 in the display device 10 is detected by the steering angle θs of the handle 731 will be described. For the sake of simplicity, when the traveling direction of the vehicle 730 changes to the right, there is a right-turned right corner on the currently traveling road, and the vehicle 730 proceeds to the right on the right corner. If you want to. Similarly, when the traveling direction of the vehicle 730 changes from straight to left, it is assumed that there is a left-turned left corner on the currently traveling road and the vehicle 730 travels to the left in the left corner.

FIG. 9 is a graph illustrating the operation of the display device according to the first embodiment.
That is, FIGS. 7A and 7B illustrate the projection position 114a of the light beam 112 when the vehicle 730 turns right. That is, FIG. 4A shows a change in the projection position 114a when starting a right turn from when going straight (that is, when entering the right corner), and FIG. This represents a change in the projection position 114a when returning to (ie, when exiting from the right corner). In these drawings, the horizontal axis represents the steering angle θs, and the vertical axis represents the movement distance Lx of the projection position 114a of the light beam 112 from the straight traveling time. In this specific example, the light flux 112 is projected onto the left eye 101L of the viewer 100.

  As shown in FIG. 9A, when the vehicle enters the right corner from straight ahead, the first steering angle threshold value θ1 related to the steering angle θs is provided. In this specific example, the first steering angle threshold value θ1 is 45 degrees. When the steering angle θs is smaller than the first steering angle threshold value θ1, the vehicle 730 is regarded as traveling straight. When entering the right corner, the steering angle θs is positive and the absolute value increases.

When the steering angle θs becomes equal to or greater than the first steering angle threshold value θ1, the vehicle 730 is determined to turn right (change the course in the right direction), and the projection position 114a of the light beam 112 is moved. In this specific example, when the steering angle θs reaches 90 degrees that is the angle θ1a, the movement distance Lx of the projection position 114a of the light beam 112 is set to the third movement distance LxLR. The angle θ1a is arbitrary as long as it is equal to or greater than the first steering angle threshold value θ1, and the change rate of the movement distance Lx with respect to the change of the steering angle θs can be arbitrarily set by setting the angle θ1a.
In this way, a right turn is entered and a right turn is started.

  As shown in FIG. 9B, the absolute value of the steering angle θs decreases when exiting from the right corner. That is, the handle 731 is returned to the original straight angle. At this time, a second steering angle threshold value θ2 relating to the steering angle θs is provided. In this specific example, the first steering angle threshold value θ2 is 180 degrees.

  That is, when the steering angle θs decreases, if the steering angle θs is larger than the second steering angle threshold value θ2, the movement distance Lx of the projection position 114a of the light beam 112 maintains the third movement distance LxLR. . When the steering angle θs decreases, if the steering angle θs becomes equal to or smaller than the second steering angle threshold value θ2, the movement distance Lx of the projection position 114a of the light beam 112 is decreased from the third movement distance LxLR. The

  In this specific example, when the steering angle θs reaches 135 degrees which is the angle θ2a, the movement distance Lx of the projection position 114a of the light beam 112 is set to zero. The angle θ2a is arbitrary as long as it is equal to or smaller than the second steering angle threshold value θ2, and the change rate of the movement distance Lx with respect to the change of the steering angle θs can be arbitrarily set by setting the angle θ2a.

  That is, according to the inventor's experiment, when entering the corner, when the steering angle θs is small (for example, 45 degrees), the one eye 101 of the viewer 100 starts moving from the straight traveling direction and exits from the corner, that is, When returning the rudder angle θs to the original state, it has been found that when the rudder angle θs is large (for example, 180 degrees), the one eye 101 of the viewer 100 starts to move to the original straight position. In accordance with this characteristic, the movement of the projection position 114a of the light beam 112 is controlled.

Based on this characteristic found by the inventor, the projection position 114a of the light beam 112 is controlled. That is, the threshold value (first steering angle threshold value θ1) of the steering angle θs at which the projection position 114a of the light beam 112 starts to move when entering the corner is based on the projection position 114a of the light beam 112 when exiting the corner. It is smaller than the threshold value (second steering angle threshold value θ2) of the steering angle θs to be returned.
Thereby, the operation | movement adapted to the characteristic of a person can be implemented, and even if the position of eyes moves, it can make it easier to see.

FIGS. 9C and 9D show another example of the projection position 114a of the light beam 112 when the vehicle 730 turns right.
As shown in FIG. 9C, the first steering angle threshold value θ1 and the angle θ1a may be the same value. In this case, the projection position 140a of the light beam 112 is moved at a time by the third movement distance LxLR.
Further, as shown in FIG. 9D, the second steering angle threshold angle θ2 and the angle θ2a may be the same value. In this case, the projection position 140a of the light beam 112 is moved at a time by the third movement distance LxLR.

FIG. 10 is a graph illustrating another operation of the display device according to the first embodiment.
That is, these drawings illustrate the projection position 114a of the light beam 112 when the vehicle 730 makes a left turn. That is, FIG. 9A shows a change in the projection position 114a when entering the left corner, and FIG. 10B shows a change in the projection position 114a when exiting from the left corner. In these drawings, the horizontal axis represents the steering angle θs, and the vertical axis represents the movement distance Lx of the light beam 112 from the straight projection position 114a. In this specific example, the light flux 112 is projected onto the right eye 101R of the viewer 100.

  As shown in FIG. 10 (a), when entering the left corner from straight ahead, a third steering angle threshold value θ3 relating to the steering angle θs is provided. In this specific example, the third steering angle threshold value θ3 is −45 degrees. The absolute value of the third steering angle threshold value θ3 may be different from the absolute value of the first steering angle threshold value θ1. When the absolute value of the steering angle θs is smaller than the absolute value of the third steering angle threshold value θ3, the vehicle 730 is regarded as traveling straight. When entering the left corner, the steering angle θs is negative and the absolute value increases.

When the steering angle θs is negative and the absolute value of the steering angle θs becomes equal to or larger than the absolute value of the third steering angle threshold value θ3, it is determined that the vehicle 730 turns left, and the projection position 114a of the light beam 112 is moved. In this specific example, when the absolute value of the steering angle θs becomes −90 degrees that is the angle θ3a, the movement distance Lx of the projection position 114a of the light beam 112 is set to the second movement distance LxRL. The absolute value of the angle θ3a is arbitrary as long as it is equal to or larger than the absolute value of the third steering angle threshold value θ3, and the change rate of the moving distance Lx with respect to the change of the absolute value of the steering angle θs is set by the setting of the angle θ3a. Can be set arbitrarily.
In this way, the left corner is entered and a left turn is started.

  As shown in FIG. 10B, when leaving the left corner, the steering angle θs is negative, and the absolute value of the steering angle θs decreases. That is, the handle 731 is returned to the original straight angle. At this time, a fourth steering angle threshold value θ4 related to the steering angle θs is provided. In this specific example, the fourth steering angle threshold value θ4 is −180 degrees. The absolute value of the fourth steering angle threshold value θ4 may be different from the absolute value of the second steering angle threshold value θ2.

  That is, when the rudder angle θs is negative and the absolute value of the rudder angle θs decreases, if the absolute value of the rudder angle θs is larger than the fourth rudder angle threshold value θ4, the projection position 114a of the light beam 112 moves. The distance Lx maintains the second movement distance LxRL. When the steering angle θs is negative and the absolute value of the steering angle θs decreases, the projection position 114a of the light beam 112 moves when the absolute value of the steering angle θs becomes equal to or smaller than the fourth steering angle threshold value θ4. The distance Lx is reduced from the second movement distance LxRL.

  In this specific example, when the steering angle θs reaches −135 degrees, which is the angle θ4a, the movement distance Lx of the projection position 114a of the light beam 112 is set to zero. The absolute value of the angle θ4a is arbitrary as long as it is equal to or smaller than the fourth steering angle threshold value θ4, and the change rate of the movement distance Lx with respect to the change of the steering angle θs can be arbitrarily set by setting the angle θ4a.

  Thus, even in the case of a left turn, the projection position 114a of the light beam 112 is controlled based on the above-described characteristics found by the inventor. That is, the absolute value of the steering angle θs threshold value (third steering angle threshold value θ3) at which the projection position 114a of the light beam 112 starts to move when entering the corner is the projection position 114a of the light beam 112 when exiting the corner. Is smaller than the absolute value of the threshold value of the steering angle θs (fourth steering angle threshold value θ4).

FIGS. 10C and 10D show another example of the projection position 114a of the light beam 112 when the vehicle 730 turns left.
As shown in FIG. 10C, the third steering angle threshold value θ3 and the angle θ3a may be the same value. In this case, the projection position 140a of the light beam 112 is moved at a time by the second movement distance LxRL.

  As shown in FIG. 10D, the fourth steering angle threshold value θ4 and the angle θ4a may be the same value. In this case, the projection position 140a of the light beam 112 is moved at a time by the second movement distance LxRL.

Thus, in the display device 10, the traveling direction of the vehicle 730 can be detected based on the steering angle θs of the handle 731 of the vehicle 730.
And when entering a corner, the following is carried out. That is, the control unit 250 determines that the absolute value of the steering angle θs of the handle 731 of the vehicle 730 on the basis of when the vehicle 730 travels straight is a predetermined first value (first steering angle threshold θ1 or third When the steering angle threshold value θ3) is equal to or greater than the absolute value, the projection position 114a of the light beam 112 is moved from the projection position of the light beam 112 when the vehicle 730 travels straight (projection position 114o during straight travel). The steering angle θs is an angle with respect to a reference angle (for example, the reference angle 731ao illustrated in FIG. 5) of the handle 731 of the vehicle 730 when the vehicle travels straight.

  And when exiting a corner, the following is performed. That is, the control unit 250 determines that the absolute value of the steering angle θs is the absolute value of the first value when the traveling direction of the vehicle 730 returns to the straight traveling direction after the traveling direction of the vehicle 730 changes to the right direction or the left direction. The projection position 114a of the light beam 112 is moved when the value becomes equal to or smaller than a predetermined second value (second steering angle threshold value θ2 or fourth steering angle threshold value θ4) having an absolute value greater than From this position, it returns toward the projection position of the light beam 112 when the vehicle 730 travels straight (projection position 114o during straight travel).

  Thereby, the operation | movement adapted to the characteristic of a person can be implemented, and even if the position of eyes moves, it can make it easier to see.

  For example, when the absolute value of the steering angle θs is not less than the first steering angle threshold value θ1 and not more than the second steering angle threshold value θ2, or the fourth steering angle is not less than the third steering angle threshold value θ3. When the threshold value θ4 is equal to or smaller than the threshold value θ4, there is a possibility that an “oscillation” state in which the operation of moving the projection position 140a and the operation of returning the projection position 140a are repeated within a short time may occur. Various devices can be implemented to prevent this “oscillation” from occurring. For example, instead of performing the above-described control using the instantaneous value of the steering angle θs, the tendency of the steering angle θs to increase or decrease within a certain time is detected, and the tendency and the above-described threshold value are combined. The projection position 140a can be controlled. For example, when the absolute value of the steering angle θs is maintained for an increase or when the decrease is maintained for a certain time or longer, an operation of moving or returning the projection position 140a is performed. Further, when the rate of change of the absolute value of the steering angle θs per time or the rate of change per time of the decrease is equal to or greater than a certain value, an operation of moving or returning the projection position 140a is performed. Such control can be performed by any one of analog circuit technology, digital circuit technology, and computer software technology, or a combination thereof.

FIG. 11 is a schematic view illustrating the configuration of another display device according to the first embodiment.
That is, this figure illustrates the configuration of another display device 10a according to the present embodiment. The figure illustrates the configuration of the image forming unit 110 and the projection unit 120. That is, in the figure, the control unit 250 and the video data generation unit 130 are omitted, and the configuration of the control unit 250 and the video data generation unit 130 in the display device 10a can be the same as that of the display device 10.

  As shown in FIG. 11, the projection unit 120 includes a light source 121, a tapered light guide 122, a light source side lens 123, a first mirror 124a, an exit side lens 125, a second mirror 125a, and an exit side mirror. 126.

  A taper light guide 122 is disposed between the light source 121 and the exit side mirror 126 along the traveling direction of the light that becomes the light beam 112, and a light source side lens 123 is disposed between the taper light guide 122 and the exit side mirror 126. The first mirror 124a is disposed between the light source side lens 123 and the exit side mirror 126, the exit side lens 125 is disposed between the first mirror 124a and the exit side mirror 126, and the exit side lens 125 and the exit side mirror 126 are exited. A second mirror 125 a is disposed between the side mirror 126.

  An image forming unit 110 (for example, an LCD) is disposed between the taper light guide 122 and the light source side lens 123.

Thus, in the display device 10a, the optical path of the light beam 112 is folded.
For the light source side lens 123, for example, a plano-concave lens is used. For example, a concave mirror is used as the first mirror 124a. The first mirror 124a has the function of the aperture 124 in the display device 10 illustrated in FIG.

  For the exit side lens 125, for example, a biconcave lens is used. For example, a plane mirror is used as the second mirror 125a. For the exit side lens 125, for example, a concave mirror is used.

  In this specific example, the emission side mirror 126 has a function of changing the emission direction of the light beam 112 in the vertical direction. The second mirror 125a has a function of changing the emission direction of the light beam 112 in the left-right direction.

  That is, in the specific example, the control unit 250 moves the projection position 114a of the light beam 112 at the position of the viewer 100 by changing the angle of the second mirror 125a, for example. However, also in the display device 10a, the control unit 250 may control not only the second mirror 125a but also other optical elements, and for example, the angle of the projection unit 120 or the video projection unit 115 itself. Or the position may be changed.

  The display device 10a performs the same operation as the display device 10 so that it can be easily viewed even if the position of the eye of the viewer 100 moves corresponding to, for example, a right turn or a left turn. A display device can be provided.

  In the display devices 10 and 10a according to the embodiments of the present invention, as the image forming unit 110, in addition to the LCD, various kinds of light such as DMD (Digital Micromirror Device) and MEMS (Micro-electro-mechanical System) are used. A switch can be used. The image forming unit 110 may be a laser projector, an LED projector, or the like. In that case, an image is formed by a laser beam or light from the LED.

  As the light source 121, various types such as an LED, a high-pressure mercury lamp, a halogen lamp, and a laser can be used.

  In the above-described embodiment, the display devices 10 and 10a have been described as an example of projecting the light beam 112 on the one eye 101 of the human viewer 100. However, the present embodiment is not limited thereto. In this embodiment, the position of the eye of the viewer 100 who steers the vehicle 730 moves straight when the vehicle 730 makes a right turn (advancing direction changes to the right) or a left turn (advancing direction changes to the left). The control of the projection position 140a according to the present embodiment is performed with both eyes, based on the experimental results regarding the human characteristics shown in FIGS. 4 (a) and 4 (b). It can also be provided for viewing display devices and exhibits the same effect. However, when the control of the projection area 140a according to the present embodiment is applied to a display device that is viewed with one eye in which the projection control 140 of the light beam 112 is narrowly controlled, a particularly large effect is exhibited.

  The vehicle 730 (moving body) on which the display device according to this embodiment is mounted may be a two-wheeled vehicle as well as a four-wheeled vehicle. In addition, the display device according to the present embodiment may be mounted on a railway vehicle, a bus, or the like. Even in such a case, it is possible to provide a HUD type display device that is easy to view by moving the projection position 114a of the light beam 112 in accordance with the change in the traveling direction of the vehicle 730 (moving body). Furthermore, the display device according to the present embodiment is mounted not only on a vehicle but also on an arbitrary moving body including an aircraft and a ship, and the same effect can be obtained by performing the same operation.

  In addition, the display device according to the present embodiment can be used in various simulators simulating vehicles and aircraft. Also in this case, when the traveling direction of the simulator vehicle changes to the right, the control unit 250 causes the right eye to move from the left eye 101L of the viewer 100 to the projection position 114a of the light beam 112 when the simulator vehicle travels straight. When the projection position 114a of the light beam 112 is moved in the direction toward 101R and the traveling direction of the vehicle of the simulator changes to the left direction, the right eye 101R of the viewer 100 moves from the right eye 101R to the left eye 101L rather than the projection position 114a when traveling straight. The projection position 114a of the light beam 112 is moved in the direction. Thereby, a HUD type display device for a simulator that is easy to view can be provided.

  Furthermore, the display device according to the present embodiment can also be applied to a display device for entertainment such as a game that presents the depth perception by viewing with one eye.

(Second Embodiment)
The second embodiment of the present invention is a display method. In other words, the display method according to the present embodiment is a display method in which the light beam 112 including an image is reflected on the windshield 710 of the vehicle 730 (moving body) and projected toward the viewer 100 riding on the vehicle 730. .
FIG. 12 is a flowchart showing a display method according to the second embodiment of the present invention.
As shown in FIG. 12, in the display method according to the present embodiment, when the traveling direction of the vehicle 730 changes to the right, the viewer 100 is more than the projection position 114a of the light beam 112 when the vehicle 730 travels straight. The projection position 114a of the light beam 112 is moved in the direction from the left eye 101L to the right eye 101R (positive direction in the X direction) (step S10).

When the traveling direction of the vehicle 730 changes to the left direction, the direction from the right eye 101R to the left eye 101L of the viewer 100 rather than the projection position 114a of the light beam 112 when the vehicle 730 travels straight (negative in the X direction). The projection position 114a of the light beam 112 is moved in the direction (step S20).
In addition, the order of said step S10 and step S20 is arbitrary, and it can replace each other.

  That is, when the vehicle 730 makes a right turn or a left turn, the projection position 114a of the light beam 112 is set so that the position of the eye of the viewer 100 moves from when the vehicle is traveling straight. Move from the projection position 114a. Thereby, when the vehicle 730 makes a left turn or a right turn, even if the position of the one eye 101 of the viewer 100 moves, it can be easily viewed.

In particular, step S10 is desirably performed when the light beam 112 is projected onto the left eye 101L of the viewer 100 when the vehicle 730 travels straight.
Step S20 is preferably performed when the light beam 112 is projected onto the right eye 101R of the viewer 100 when the vehicle 730 travels straight.

  That is, when the traveling direction of the vehicle 730 changes to the right, when the light beam 112 is projected on the left eye 101L when the vehicle 730 travels straight, the projection position 140a of the light beam 112 when the vehicle 730 travels straight Also, the projection position 140a of the light beam 112 is moved in the direction from the left eye 101L to the right eye 101R of the viewer 100.

  Then, when the traveling direction of the vehicle 730 changes to the left, when the light beam 112 is projected onto the right eye 101R when the vehicle 730 travels straight, from the projection position 140a of the light beam 112 when the vehicle 730 travels straight. Also, the projection position 140a of the light beam 112 is moved in the direction from the right eye 101R to the left eye 101L of the viewer 100.

(Third embodiment)
The mobile body (vehicle) according to the third embodiment of the present invention is mounted with any display device according to the embodiment of the present invention.
That is, for example, as illustrated in FIG. 3, the vehicle 730 (moving body) according to the present embodiment uses the display device 10 according to the embodiment of the present invention and the light flux 112 emitted from the display device 10 to the viewer 100. A windshield portion 710 that reflects toward the screen. The windshield portion 710 may be provided with a reflective portion 711 (for example, a combiner), and the windshield portion 710 includes the reflective portion 711.

  According to the vehicle according to the present embodiment, when the vehicle 730 makes a right turn or a left turn, the light beam 112 of the luminous flux 112 is matched with the human characteristic that the position of the eye of the viewer 100 moves from when the vehicle 730 goes straight. The projection position 114a is moved from the projection position 114a when traveling straight. Thereby, when the vehicle 730 makes a left turn or a right turn, even if the position of the one eye 101 of the viewer 100 moves, it can be easily viewed.

The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. For example, regarding the specific configuration of each element constituting the display device and the moving body (vehicle), those skilled in the art can implement the present invention in the same manner by appropriately selecting from the well-known ranges and obtain the same effects. To the extent possible, they are included within the scope of the present invention.
Moreover, what combined any two or more elements of each specific example in the technically possible range is also included in the scope of the present invention as long as the gist of the present invention is included.

  In addition, all display devices, display methods, and movable bodies that can be implemented by those skilled in the art based on the display devices, display methods, and movable bodies described above as embodiments of the present invention are also included in the present invention. As long as the gist is included, it belongs to the scope of the invention.

  In addition, in the category of the idea of the present invention, those skilled in the art can conceive of various changes and modifications, and it is understood that these changes and modifications also belong to the scope of the present invention. .

  DESCRIPTION OF SYMBOLS 10, 10a ... Display apparatus, 100 ... Viewer, 101 ... One eye, 101L ... Left eye, 101R ... Right eye, 105 ... Head, 110 ... Image formation part, 112 ... Light flux, 114 ... Projection area, 114a ... Projection position, 114o: Projection position during straight travel, 115 ... Video projection unit, 120 ... Projection unit, 121 ... Light source, 122 ... Tapered light guide, 123 ... Light source side lens, 124 ... Aperture, 124a ... First mirror, 125 ... Emission side lens, 125a ... second mirror, 126 ... exit-side mirror, 126a ... drive unit, 130 ... video data generation unit, 180 ... display object, 181 ... image, 181a ... image forming position, 250 ... control unit, 251 ... control signal unit, 252: Detection unit, 710: Windshield unit, 711: Reflection unit (combiner), 720 Dashboard, 730 ... Vehicle (moving body), 731 ... Steering wheel (steering, steering device), 731a ... Shaft, 731ao ... Reference angle, Cg ... Center of gravity, Dex ... Eye movement distance, Fg ... Load, Fh ... Force, Lx ... Travel distance, LxLL ... Fourth travel distance, LxLR ... Third travel distance, LxRL ... Second travel distance, LxRR ... First travel distance, θ1 ... First rudder angle threshold, θ1a ... Angle, θ2 ... Second rudder Angular threshold value, θ2a ... angle, θ3 ... third steering angle threshold value, θ3a ... angle, θ4 ... fourth steering angle threshold value, θ4a ... angle, θs ... steering angle

Claims (6)

A display device mounted on a moving body and reflecting a light beam including an image on a windshield portion of the moving body and projecting it toward a viewer who is on the moving body,
A video projection unit for projecting the luminous flux toward the viewer;
A control unit for controlling the image projection unit to control the projection position of the light beam at the position of the viewer;
With
The controller is
When the traveling direction of the moving body changes to the right, the projection position of the light beam is moved in a direction from the left eye of the viewer to the right eye rather than the projection position of the light beam when the moving body travels straight. ,
When the traveling direction of the moving body changes to the left, the projection of the light beam in a direction from the right eye to the left eye of the viewer rather than the projection position of the light beam when the moving body moves straight A display device characterized by moving a position. The controller is
When the traveling direction of the moving body changes to the right, when the light beam is projected to the left eye when the moving body travels straight, the projected position of the light beam when the moving body travels straight And moving the projection position of the luminous flux in the direction from the left eye to the right eye of the viewer,
When the moving direction of the moving body changes to the left, the projection position of the light beam when the moving body goes straight when the light beam is projected to the right eye when the moving body goes straight The display device according to claim 1, wherein the projection position of the light beam is moved in the direction from the right eye to the left eye of the viewer.   The control unit is at least one of a steering angle of the moving body steering device, a lateral acceleration applied to the moving body, a change in the posture of the viewer, and a change in the position of the center of gravity of the viewer. The display device according to claim 1, further comprising: a detection unit configured to detect the traveling direction of the moving body based on the detection result. The controller is
When the absolute value of the steering angle of the steering device of the moving body based on the time when the moving body goes straight is equal to or larger than the absolute value of a predetermined first value, the projection position of the luminous flux is Moving from the projection position of the luminous flux when the moving body goes straight;
When the traveling direction of the moving body returns to the straight traveling direction after the traveling direction of the moving body changes to the right or left direction, the absolute value of the rudder angle is an absolute value greater than the first value. When the projection position of the luminous flux is moved from the moved position to the projection position of the luminous flux when the moving body goes straight when the absolute value of the predetermined second value or less is reached. The display device according to claim 1, wherein the display device is returned. A display method for reflecting a light beam including an image on a windshield portion of a moving body and projecting the reflected light toward a viewer riding on the moving body,
When the traveling direction of the moving body changes to the right, the projection position of the light beam is moved in a direction from the left eye of the viewer to the right eye rather than the projection position of the light beam when the moving body travels straight. ,
When the traveling direction of the moving body changes to the left, the projection of the light beam in a direction from the right eye to the left eye of the viewer rather than the projection position of the light beam when the moving body moves straight A display method characterized by moving a position. A display device according to any one of claims 1 to 4,
A windshield portion that reflects the luminous flux emitted from the display device toward the viewer;
A moving object comprising:

Images