JP2011133508A - Scanned type display-device optical system, three-dimensional display device and head-up display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display a three-dimensional image at an intended display distance, at an optimum condition, and with a simple and inexpensive configuration. <P>SOLUTION: The scanned type display-device optical system 10 includes a two-dimensional image forming element 11, a first condenser lens 12, a diaphragm 13, a second condenser lens 14, a one-dimensional scanner 15, a third condenser lens 16 and a diffuser 17. For the two-dimensional image forming element 11, a display device using a liquid crystal display, an organic EL display, or a digital micromirror device or the like can be used. An input parallactic image is switched at a high speed and displayed at time division. The one-dimensional scanner 15, by performing scan linked to the operation of the two-dimensional image forming element 11, projects the image of the two-dimensional image forming element 11 on the diffuser 17, and displays the parallactic image on the eyeballs 21L and 21R of an observer 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a scanning display device optical system, a stereoscopic display device, and a head-up display device, and more particularly to a scanning display device optical system capable of stereoscopic display with a simple configuration, a stereoscopic display device using the optical system, and the stereoscopic display device. The present invention relates to a head-up display (HUD) device using a display device.

  Conventionally, as a stereoscopic display device, a stereoscopic display that obtains a stereoscopic effect by presenting an image having disparity (imbalance, unbalance) between the left and right eyes has been realized by various display methods (see, for example, Patent Document 1). Most simply, two aerial photographs have been observed with the naked eye or with a simple device to create a map.

  In recent years, in order to obtain a more realistic stereoscopic image, there is an image using an integral display or a multi-view image instead of a left-and-right two-view image (see Patent Document 2). A stereoscopic display with 128 images called an eye system has also been proposed (see Patent Document 3). In this super multi-view stereoscopic image display, a large number of ray groups obtained by sampling light emitted from an actual object in an angular unit are reproduced in space, and two or more parallax images are displayed in each pupil of the left and right eyes. A multi-viewpoint image is displayed at a fine pitch so as to be incident. As a result, it is possible to realize a three-dimensional color moving image display in which horizontal motion parallax and eye strain do not occur.

  Also, a stereoscopic display device using a DMD device, a plurality of cylinder lenses, and a vertical diffusion plate when displaying a stereoscopic image with a hologram is disclosed (Non-patent Document 1).

  On the other hand, for example, a night driving vision support device (night vision) that displays with a head-up display (hereinafter abbreviated as HUD) device in a vehicle interior via an infrared camera as a forward vision support device is also known (see Patent Document 4). ).

Japanese Patent No. 3851887 JP 2001-42257 A JP 2007-309975 A Japanese Patent No. 3855439

Applied Optics 10 June 2009 /Vol.48,No.17/3255-3260

  However, in the conventional stereoscopic display device using the super multi-view system, one two-dimensional display device is required for each image (for example, 128), so that the stereoscopic display device becomes large and the cost increases. was there. In addition, the super multi-view or integral display has a problem that the angle at which the parallax is given is determined, that is, the distance of the object to be presented is limited.

  For this reason, for example, when a HUD display device is mounted on a moving body such as a vehicle and an image of an obstacle is superimposed on a real scene and displayed on a driver, the distance of the obstacle is displayed with a deviation from the actual distance. There was also a problem that the driver could not accurately grasp the distance to the obstacle. Further, when using a hologram, there is a problem that it takes time to create image data.

  Therefore, in the present invention, there is provided a scanning display device optical system, a stereoscopic display device, and a head-up display device capable of easily creating image data and capable of optimally displaying a stereoscopic image with a simple configuration at an intended presentation distance. The purpose is to provide it at low cost.

  The invention according to claim 1 is a two-dimensional image forming element that displays a plurality of sets of parallax images divided in time, a first condenser lens disposed downstream of the two-dimensional image forming element, and the two-dimensional A diaphragm arranged at a focal position of the first condenser lens of the image forming element, a second condenser lens arranged downstream of the diaphragm, and arranged downstream of the second condenser lens, the time division A one-dimensional scanner for scanning the parallax image with a predetermined amplitude and timing, a third condenser lens arranged downstream of the one-dimensional scanner, and a position optically conjugate with the third condenser lens And a diffusing plate that diffuses light only in a substantially vertical direction.

  According to a second aspect of the present invention, there is provided a scanning display device optical system according to the first aspect, a parallax image generating means for generating a plurality of parallax images to be displayed on the two-dimensional image forming element at a predetermined timing, and the parallax image The image forming element driving means for driving the two-dimensional image forming element based on the above, the scanner driving means for driving the one-dimensional scanner, and the driving of the scanner driving means based on the parallax image generation timing of the parallax image generating means And a scanner driving control means for performing control.

  A third aspect of the present invention is the stereoscopic display device according to the third aspect, further comprising eyeball information acquisition means for acquiring eyeball information including at least one of position information and line-of-sight information of an observer's eyeball, and the scanner drive control The means drives the scanner driving means based on the eyeball information.

  According to a fourth aspect of the present invention, there is provided a head-up display device comprising the stereoscopic display device according to the second or third aspect.

  According to a fifth aspect of the present invention, in the head-up display device according to the fourth aspect, a stereoscopic image is displayed on the operator of the moving body by reflecting the image of the diffusion plate on the front window screen of the moving body. .

  According to the scanning display device optical system and the stereoscopic display device according to the present invention, it is possible to perform stereoscopic display only by using one two-dimensional display and a standard one-dimensional scanner, so that image data can be easily created. And it can be made low-cost by a simple structure.

  Further, according to the stereoscopic display device according to the present invention, since the stereoscopic image can be displayed as appropriate for the state of the eyeball by controlling the driving of the one-dimensional scanner based on the acquired eyeball information, it is possible to display the stereoscopic image at the intended distance and position. A highly realistic stereoscopic image can be displayed.

  Furthermore, according to the head-up display according to the present invention, the operator can superimpose and display a stereoscopic image indicating an obstacle or the like on the night scene with a correct sense of distance on the actual landscape. A sense of distance to the obstacle can be accurately grasped.

It is a schematic diagram which shows the scanning display apparatus optical system which concerns on an Example. It is a schematic diagram which shows the principle of the stereoscopic vision in a scanning display apparatus optical system. It is a schematic diagram which shows the principle of the stereoscopic vision in a scanning display apparatus optical system. It is a schematic diagram which shows the head-up display apparatus which concerns on an Example. It is a block diagram which shows the control system of the head up display apparatus which concerns on an Example. It is a schematic diagram which shows. It is a schematic diagram which shows the modification of the head-up display apparatus which concerns on an Example. It is a schematic diagram which shows the image in the use condition of a head-up display apparatus. It is a schematic diagram which shows the survey point marker displayed with a head-up display apparatus.

  The scanning display device optical system according to the present invention includes a two-dimensional image forming element that displays a plurality of sets of parallax images divided in time, and a first condenser lens disposed downstream of the two-dimensional image forming element. A diaphragm disposed at a focal position of the first condenser lens of the two-dimensional image forming element, a second condenser lens disposed downstream of the diaphragm, and disposed downstream of the second condenser lens. A one-dimensional scanner that scans the time-divided parallax image with a predetermined swing width and timing, a third condenser lens disposed downstream of the one-dimensional scanner, the third condenser lens, and the optical system. And a diffusion plate that is disposed at a conjugate position and diffuses light only in a substantially vertical direction.

  In this example, a display device using an organic EL display, a liquid crystal display, a digital micromirror device, or the like can be adopted as the two-dimensional display device, and the light from these two-dimensional display devices is a first condensing light. The light is guided to a one-dimensional scanner through a lens, a diaphragm, and a second condenser lens, and is projected through a third condenser lens onto a diffusion plate that diffuses light only in the vertical direction.

  In this example, a stereoscopic image can be displayed by displaying a parallax image of a stereoscopic image to be displayed on the two-dimensional display device in a time-sharing manner, and the stereoscopic image data can be easily created compared to the hologram data. Can do.

  The stereoscopic display device according to the present invention is based on the scanning display device optical system, parallax image generation means for generating a plurality of parallax images to be displayed on the two-dimensional image forming element at a predetermined timing, and the parallax image. Drive control of the scanner driving means is performed based on the parallax image generation timing of the image forming element driving means for driving the two-dimensional image forming element, the scanner driving means for driving the one-dimensional scanner, and the parallax image generating means. Scanner drive control means.

  According to this example, the parallax image from the parallax image generating unit is displayed by the two-dimensional image forming element driven by the image forming element driving unit, and scanned by the one-dimensional scanner driven by the scanner driving unit. At this time, the scanner drive unit is controlled by the scanner drive control unit based on the generation timing of the parallax image, and the scanned image is projected onto the diffusion plate at a predetermined timing to allow the observer to visually recognize an appropriate parallax image. be able to.

  The stereoscopic display device according to the present invention further includes eyeball information acquisition means for acquiring eyeball information including at least one of position information and line-of-sight information of the eyeball of the observer, and the scanner drive control means is based on the eyeball information. To drive the scanner driving means.

  According to this example, since the driving of the one-dimensional scanner is controlled based on the acquired eyeball information, it is possible to display an optimal stereoscopic image in accordance with the observer's posture and line-of-sight state of the stereoscopic display device.

  The head-up display device according to the present invention includes a stereoscopic display device. According to this example, a 3D display device is mounted on a moving body such as a vehicle to form a head-up display device, and instrument information and an image of an obstacle at night can be displayed to the operator of the moving body. A stereoscopic image of an object such as an object can be displayed with an accurate sense of distance that matches the actual distance, and the operator can accurately grasp an obstacle.

  In the head-up display device according to the present invention, the image of the diffusion plate is reflected on the front window screen of the moving body and displayed to the operator of the moving body. According to this example, the display of instruments and images of obstacles at night can be displayed on the front shield screen of a moving object such as a vehicle superimposed on the actual scenery viewed from the front shield screen, and the operator can move his / her line of sight It is possible to view the image of the instrument and the obstacle at night in three dimensions.

  The image forming apparatus according to the embodiment will be described below. 1A and 1B show a scanning display device optical system used in a head-up display device according to an embodiment. FIG. 1A is a schematic plan view, and FIG. 1B is a schematic view from a B direction in FIG. 2 and 3 are schematic views showing the principle of stereoscopic vision in the scanning display device optical system.

  As shown in FIG. 1, the scanning display device optical system 10 according to the present example includes a two-dimensional image forming element 11, a first condenser lens 12, a diaphragm 13, a second condenser lens 14, and a one-dimensional element. The scanner 15, the third condenser lens 16, and the diffusion plate 17 are provided. As the two-dimensional image forming element 11, a display device using a liquid crystal display, an organic EL display, a digital micromirror device, or the like can be used, and an input parallax image is switched at high speed and displayed in a time-sharing manner.

  The first condenser lens 12 is a positive lens and is disposed on the downstream side of the two-dimensional image forming element 11. The diaphragm 13 is disposed at the focal position of the first condenser lens 12. Further, the second condenser lens 14 is a positive lens and is disposed downstream of the diaphragm 13. The one-dimensional scanner 15 is configured as a galvano mirror that swings a scanning mirror 15a that scans the time-divided parallax image with a predetermined swing width and timing at a predetermined timing by electromagnetic force.

The third condenser lens 16 is a positive lens, has a focal position at the image formation position by the second condenser lens 14 of the diaphragm 13, and projects the image of the two-dimensional image forming element 11 onto the diffusion plate 17. The diffusion plate 17 is disposed at a position optically conjugate with the third condenser lens, and the optical system according to this example forms a telecentric optical system.

The diffusing plate 17 is an element having a characteristic of diffusing light only in the vertical direction (perpendicular to the paper surface of FIG. 1A) and transmitting light in the horizontal direction without diffusing, and is formed by, for example, microfabrication. The diffractive optical element can be employed.

  In such a scanning display device optical system 10, an image displayed on the two-dimensional image forming element 11 enters the one-dimensional scanner 15 through the first condenser lens 12, the diaphragm 13, and the second condenser lens 14. . Incident light is scanned by the one-dimensional scanner 15 and irradiated on the third condenser lens 16 to form an image on the diffusion plate 97. Accordingly, in the scanning display device optical system 10 according to this example, scanning by the one-dimensional scanner 15 is performed in the left-right direction from the observer 20, and the pixels of the two-dimensional image forming element 11 are pixels that the observer 20 recognizes as they are. The angle of the light beam incident on the diffusion plate 17 is determined by the angle of the scanning mirror 15a of the one-dimensional scanner 15.

  Then, as shown in FIG. 2, in order for the observer 20 to display the point A at a predetermined position, a light beam from the one-dimensional scanner 15 is connected to the straight line LL connecting the left eyeball 21L and the point A and the right eyeball 21R. The corresponding pixels of the two-dimensional image forming element 91 are displayed so as to coincide with the straight line LR connecting the points A. Thereby, an image with parallax is incident on the left eyeball 21L and the right eyeball 21R of the observer 20, and the observer 20 can recognize the stereoscopic image of the point A. Here, the observer 20 may actually move, and in order to cope with this, in this example, the two-dimensional image forming element 11 displays a one-dimensional image corresponding to the point A observed from each direction. The scanner 15 is scanned in synchronization with this display, and light is incident from all the positions of the diffuser plate 17 in the direction toward the point A. Specifically, the light is displayed on the two-dimensional image forming element 11 in accordance with the luminance, color, position, and angle of the one-dimensional scanner so that a light beam from the point A to the diffusion plate 17 exists.

  The above description is for the case where only one point (point A) is displayed for the sake of simplicity. However, by displaying a plurality of points, a stereoscopic image is displayed, or a plurality of points that change over time are displayed. It is possible to display a stereoscopic video. Further, by adjusting the light emission amount of the pixel, a bright and dark image can be displayed, and if the two-dimensional image forming element 11 has a color display, a color stereoscopic display can be performed. Accordingly, symbols such as arrows and other patterns and three-dimensional objects can be obtained. In these cases, the angle of the one-dimensional scanner 15 is set so that images corresponding to the patterns and objects enter the left and right eyeballs 21L and 21R. Accordingly, the two-dimensional image forming element 11 is displayed.

  Here, when it comes to a certain moment, the angle of the horizontal direction of the light emitted from the diffuser plate 17 is only one direction. The spatial pattern of these light diffusion plates is the same as that of the image panel.

  In this embodiment, the one-dimensional scanner 15 scans from one outermost angle to the opposite angle, displays one stereoscopic image, and then repeats it to display the stereoscopic image, so that human visual characteristics are considered. The scanning speed for scanning one image needs to be at least about 30 Hz (note that the speed in the return direction is ignored as a high speed). In this example, if the super multi-eye display (for example, 128 eyes) shown in Patent Document 3 is performed in 1/30 seconds, the two-dimensional image forming element 91 displays images from each direction a predetermined number of times (for example, 128). Times) rewritten. The direction in which the stereoscopic image is displayed is determined by the direction of the scanning mirror 15a of the one-dimensional scanner 15.

  As shown in FIG. 3, when the scanning display device optical system 10 according to this example is used, the light beam is between the line segment LA and the line segment LB from the position of the image to be displayed and the observer 20. It can be seen that a good three-dimensional image can be displayed. Therefore, the swing angle of the scanning mirror 15a of the one-dimensional scanner 15 is a line required for observing the image in consideration of the light rays from the one-dimensional scanner 15 to the center O of the diffuser plate 17, respectively. It can be seen that it suffices to swing to the same angle as the segment LA and the line segment LB. That is, it is sufficient that the swing angle of the scanning mirror 15a is half the angle of La and Lb.

  Using the scanning display device optical system 10 according to this embodiment, it is mounted on a moving body such as an automobile, a bulldozer, etc., agricultural equipment, a ship, an airplane, a vehicle, etc. It can be used for a head-up display device (HUD) device that superimposes and displays an image photographed by a camera or data such as a fuel gauge and travel distance. FIG. 4 is a schematic diagram illustrating the head-up display device according to the embodiment, and FIG. 5 is a block diagram illustrating a control system of the head-up display device according to the embodiment.

  As shown in FIG. 4, the head-up display device 50 according to this example includes a two-dimensional image forming element 11, a first condenser lens 12, a diaphragm 13, and a second condenser lens 14 of the scanning display device optical system 10. The scanning optical system 30 provided, the 3rd condensing lens 31, and the diffusion plate 32 are provided. Then, the image projected on the diffusion plate 32 is reflected by the front shield screen 33 of the vehicle and visually recognized by the observer 20. The front shield screen 33 has a semi-reflector or an antireflection film laminated on the vehicle interior side so as to reflect only a certain wavelength. In this example, the front shield screen 33 transmits near-infrared rays for acquiring eyeball information described later. Further, in the head-up display device 50 according to this example, an eyeball information acquisition unit 40 that detects the position and the line-of-sight direction of the eyeball 21 of the driver who is the observer 20 is disposed. The eyeball information acquisition unit 40 includes an irradiation unit 41 that irradiates near infrared rays near the eyeball of the observer 20, a dichroic mirror 42 that selectively reflects near infrared light, and a near infrared camera 43. The Here, the dichroic mirror 42 is disposed on the extension of the line of sight of the observer 20 so as to reflect near infrared light toward the near infrared camera 44. Moreover, the irradiation means 41 is provided with LED, for example, irradiates near infrared rays of about 940 nm.

  Next, control of the head-up display device 50 will be described. As shown in FIG. 5, the control system 60 that controls the head-up display device 50 includes an image forming element driving unit 61 that drives the two-dimensional image forming element 11, and a parallax image that outputs a parallax image to the image forming element driving unit 61. Eye information such as the posture and position of the eyeball of the observer 20 based on the timing signal from the parallax image generating means 62 and the image from the near-infrared camera 43 based on the generating means 62, the scanner driving means 63 for driving the one-dimensional scanner 15, and the parallax image generating means 62. Is provided with a scanner control means 65 for controlling the scanner driving means 63 based on the timing signal from the parallax image generation means 62 and the eyeball information from the eyeball information output means 64.

  The control system 60 drives and controls the one-dimensional scanner 15, controls the reflection direction by the one-dimensional scanner 15 in accordance with the detected eye position and line-of-sight direction, and stereoscopic images in the direction of the line of sight of the observer 20. Is displayed. In FIG. 4, in the scanning optical system 30, the one-dimensional scanner 15 reflects the light beam perpendicular to the paper surface from the two-dimensional image forming element 11 toward the upper surface of the paper surface, and the reflected light beam is scanned in the direction perpendicular to the paper surface. .

  According to the present embodiment, a 3D display device is mounted on a moving body such as a vehicle to form a head-up display device, and instrument information and an image of an obstacle at night can be displayed to the operator of the moving body. 3D images of objects such as objects can be displayed with an accurate sense of distance that matches the actual distance, allowing the operator to accurately grasp obstacles, and displaying the instrument on the front shield screen of moving objects such as vehicles In addition, an image of an obstacle at night can be displayed superimposed on an actual scene viewed from the front shield screen, and the operator can view the image of the instrument and the obstacle at night in three dimensions without moving the line of sight.

  Next, a modified example of the head-up display device will be described. FIG. 6 is a schematic diagram illustrating a modification of the head-up display device according to the embodiment. The head-up display device 70 according to the present example has the same configuration as the head-up display device 50 according to the above embodiment, in addition to the eyeball information acquisition means 80 on the moving body room side. The eyeball information acquisition unit 80 includes a near-infrared camera 81 and a dichroic mirror 82. In this example, the near-infrared camera 81 has a built-in light source that emits near-infrared light, and the irradiated near-infrared light is reflected by the dichroic mirror 82 to illuminate the vicinity of the eyeball 21 of the observer 20. According to the head-up display device 70 according to the present example, it is possible to display a stereoscopic image to the observer 20 as in the above-described embodiment without arranging a member outside the moving body.

  A case where the scanning display device optical system 10 is applied to a surveying system will be described. This surveying system is mounted on a vehicle and displays a limited image such as an arrow or a cursor superimposed on a predetermined position of a scene visually recognized by an observer. Such a system is suitable for applying the scanning display device optical system 10 according to this example. Here, the position of the cursor or the like is held on the system side. The position of the observer's eyes can be recognized by the above-described recognition device using near infrared rays.

  Next, an actual usage example of the head-up display device will be described. FIG. 7 is a schematic diagram showing a display image when the head-up display device is in use, and FIG. 8 is a schematic diagram showing various point markers displayed on the head-up display device. This example shows a case where the head-up display device is used for a mobile surveying device.

  In the mobile surveying device, a surveyor who also serves as a driver determines a survey point while moving a vehicle equipped with the mobile surveying device or in a stopped state when setting a survey point. When the surveyor sets a survey point, a point marker that takes into account the direction and distance is displayed from the relative position to the diffuser plate, corresponding to the detected position of the head and eyes of the surveyor. . For example, the displayed point marker is adjusted in parallax and size in a state in which an arrow presented on a three-dimensional display appears to be attached to the surveying object.

  In the example shown in FIG. 7, the first point marker 113 is displayed at 112 on the tree on the left side of the road 111, and the second point marker 115 is displayed at the building 114 on the right side. These point markers are displayed by, for example, red arrows and survey point numbers (circled numbers). In addition, the surveyor displays the cursor 116 during the work to determine the survey point. In this example, the cursor 116 is displayed as “×”. In the figure, reference numeral 117 denotes a window frame, and 118 denotes a handle.

  Here, the cursor and the point marker are displayed by changing the parallax and the size depending on the direction and the distance. In addition, when the camera is viewed from the vehicle side, the brightness and color of external objects may be recognized. In such a case, the cursor and pointer are easily observable by the surveyor. , It shall be displayed in color. For example, as point markers, as shown in FIG. 8, a numbered down arrow 121 (FIG. 8A), a signed left arrow 122 (FIG. 8B), a lettered up arrow 123 (FIG. )) Etc. can be set as required.

  Further, in such surveying, the vehicle, that is, the mobile surveying device often moves after the surveyor sets the survey point. In this case, the GPS or optical surveying means attached to the mobile surveying device is used. Alternatively, the display of the surveying point marker can be automatically changed by recalculating the relative positional relationship between the mobile body surveying device itself and the surveying point based on the vehicle running record.

For example, when the upper left corner of the building 114 is set as a survey point, the following procedure is used.
First step:
The surveyor sets the rough position of the survey point by moving the cursor by operating the joystick. When the joystick is moved left and right, the survey point moves left and right together with the cursor, and when the joystick is tilted back and forth, the survey point moves back and forth together with the cursor. This back-and-forth movement operation can be omitted. When there is no manual setting for forward / backward movement, the depth direction is automatically set by two-dimensional information already input and mechanical measurement in the depth direction, which will be described later. This processing is performed in a state where the setting is normally stopped. As used in the ophthalmologic apparatus, the vertical holding portion of the joystick is rotated, and the vertical direction can be designated by the rotation.

Second step:
As described above, when the surveying point is roughly determined by the surveyor, it may be necessary to accurately determine the surveying point by the apparatus. For this purpose, first, the periphery of the survey point is photographed with a camera, and feature points are extracted from the two-dimensional image obtained thereby, and the left and right, upper and lower points are determined or set automatically. Regarding the depth direction, the depth (distance) can be determined by a three-dimensional surveying means using a three-dimensional surveying means, for example, two or a plurality of cameras, in the mobile body surveying apparatus. Further, distance information can be obtained by an optical surveying method.

Third step:
Next, it is confirmed whether the survey point determined by the manual or the machine is really the point intended by the surveyor, and if necessary, correction processing is executed. In this process, a point marker is displayed as a temporary survey point, and the surveyor confirms that the display is correct. At this time, a point marker from a three-dimensional display as a head-up display device (HUD) can be superimposed and displayed while viewing the scenery. Furthermore, when the magnification and depth resolution cannot be obtained with the naked eye, the survey point and its surrounding information obtained in the process so far are displayed on the 3D display in 2D or 3D. The point can be confirmed with. In addition, using such a display, the survey point can be corrected and set with high accuracy.

  In the head-up display device according to the embodiment, the parallax in the horizontal direction is completely displayed by an object to be displayed, but the vertical direction is physically fixed at a position on the diffusion plate. In this case, since the display height changes when an observer with different eye heights comes, the display in the height direction is corrected by observing the eye height. This correction is performed by moving an image such as a cursor or point marker to be displayed in the vertical direction on the two-dimensional image forming element. In addition, the height of the eye may change during mobile surveying. In this case, too, the height of the eye is observed and the display is changed so that the height direction is appropriate in real time. It can respond.

DESCRIPTION OF SYMBOLS 10 Scanning-type display device optical system 11 Two-dimensional image forming element 12 First condensing lens 13 Aperture 14 Second condensing lens 15 One-dimensional scanner 15a Scanning mirror 16 Third condensing lens 17 Diffuser 20 Observer 21 Eyeball 21L Eyeball (left)
21R Eyeball (right)
30 Scanning optical system 31 Third condensing lens 32 Diffuser plate 33 Front shield screen 40 Eyeball information acquisition means 41 Irradiation means 42 Dichroic mirror 43 Near-infrared camera 50 Head-up display device 60 Control system 61 Image forming element driving means 62 Parallax image generation Means 63 Scanner driving means 64 Eyeball information output means 65 Scanner control means 70 Head-up display device 80 Eyeball information acquisition means 81 Near infrared camera 82 Dichroic mirror 91 Two-dimensional image forming element 97 Diffuser 111 Road 113 Point marker 114 Building 115 Point marker 116 Cursor 121 Arrow 122 Arrow 123 Arrow 42 Dichroic mirror 82 Dichroic mirror 43 Near-infrared camera 81 Near-infrared camera 113 Point marker 115 Poi Tomaka 121 arrow 122 arrow 123 arrow

Claims (5)

A two-dimensional image forming element that displays a plurality of sets of parallax images divided in time;
A first condenser lens disposed downstream of the two-dimensional image forming element;
A stop disposed at a focal position of the first condenser lens of the two-dimensional image forming element;
A second condenser lens disposed downstream of the diaphragm;
A one-dimensional scanner which is arranged downstream of the second condenser lens and scans the time-divided parallax image with a predetermined swing width and timing;
A third condenser lens disposed downstream of the one-dimensional scanner;
A diffusion plate disposed at a position optically conjugate with the third condenser lens and diffusing light only in a substantially vertical direction;
A scanning-type display device optical system. A scanning display device optical system according to claim 1;
Parallax image generating means for generating a plurality of parallax images to be displayed on the two-dimensional image forming element at a predetermined timing;
Image forming element driving means for driving the two-dimensional image forming element based on the parallax image;
Scanner driving means for driving the one-dimensional scanner;
A scanner drive control means for performing drive control of the scanner drive means based on the parallax image generation timing of the parallax image generation means;
A stereoscopic display device comprising: Eyeball information acquisition means for acquiring eyeball information including at least one of position information and line-of-sight information of an observer's eyeball;
The stereoscopic display device according to claim 2, wherein the scanner drive control unit drives the scanner drive unit based on the eyeball information.
  A head-up display device comprising the stereoscopic display device according to claim 3. 5. The head-up display device according to claim 4, wherein the image of the diffusion plate is reflected on a front window screen of a moving body to display a stereoscopic image to an operator of the moving body.