JP2020104662A - Dead angle auxiliary device - Google Patents

Abstract

To improve visibility by reducing a burden resulting from a difference in the arrangement of light-shielding plates seen from left and right eyes of a viewer.SOLUTION: A dead angle auxiliary device 20 includes a tabular transflective mirror 21 which is positioned on a viewer Mn side, and on which light representing an image is incident, and which reflects a part of the light and transmits the remaining light; a tabular mirror 22 facing a reflection plane of the transflective mirror 21 at an interval, and reflects the reflected light toward the transflective mirror 21; and a plurality of light-shielding plates 31, 32, 33 and 34 arranged to shield a part of the light incident on the transflective mirror 21 from the viewer Mn side. The light-shielding plates 31, 32, 33 and 34 respectively are arranged at equal intervals y. The arrangement interval y is an interval of a value obtained by dividing an interval D of both eyes of the viewer Mn by a natural number N.SELECTED DRAWING: Figure 5

Description

The present invention relates to a blind spot auxiliary device for visually recognizing an image in a region shielded by a shield.

In a typical vehicle, pillars (shields) that form the vehicle body are provided on the left and right sides of the windshield and the rear glass. The driver (viewer) cannot directly visually recognize the area on the extension line of the line segment that connects the driver's eyes and the pillar. The area that the driver cannot see because the pillars block the view is called a blind spot. That is, the driver cannot directly visually recognize the image located in the blind spot. A blind spot auxiliary device may be attached to a vehicle or the like so that a driver can visually recognize an image located in the blind spot. As a conventional technique related to such a blind spot assisting device, there is a technique disclosed in Patent Document 1.

The blind spot assist device of Patent Document 1 has a mirror unit that is supported by a shield and is configured by a pair of mirrors that are provided so as to face each other.

The mirror unit has a semi-transmissive mirror that reflects an image on the end and transmits a part of the light and reflects the rest of the light to the outside of the vehicle, and a semi-transmissive mirror provided along the surface of the semi-transparent mirror on the outside of the vehicle. A mirror (a plane mirror) that reflects the light reflected by the semi-transmissive mirror. The semi-transmissive mirror is provided so that light that displays an image located outside the vehicle is transmitted toward the driver. The driver can visually recognize the image in the blind spot area by visually observing the image transmitted through the semi-transmissive mirror.

JP, 2015-120477, A

The mirror unit includes a plurality of light shielding plates that are provided on the driver side of the semi-transmissive mirror and that block light that enters the semi-transmissive mirror from the driver side at a predetermined angle. Each of the light shields is arranged so that the distance between adjacent light shields is changed, and these light shields block the light incident on the semi-transparent mirror from the driver side, and the image in the blind spot area is semi-transparent. It becomes possible to reflect on a mirror.

By the way, when the driver sees the image of the blind spot through the blind spot assist device, the light shielding plate is located between the driver's eyes and the image of the blind spot. Multiple light shields are in view. At this time, since the position of the light shielding plate is closer to the eyes than the image, the driver sees the plurality of light shielding plates for each of the left and right eyes of the driver due to the parallax of the left and right eyes. For this reason, the driver may see the number of light-shielding plates more than the actual number and the arrangement intervals may be different, and the display may be annoying.

An object of the present invention is to provide a blind spot auxiliary device that can reduce the annoyance due to the difference in the arrangement of the light shielding plates that can be seen by the left and right eyes of the viewer and improve the visibility.

In the invention according to claim 1, there is provided a blind spot auxiliary device for displaying an image of an object in a blind spot area which is blocked by a shield and cannot be seen by a viewer.
A plate-shaped semi-transmissive mirror that is located on the viewer side and that receives the light representing the image, reflects a part of the light, and transmits the rest.
A plate-like mirror that faces the reflective surface of the semi-transmissive mirror with a space, and reflects the reflected light toward the semi-transmissive mirror,
A plurality of units that are arranged on the viewer side of the semi-transmissive mirror, are long in the vertical direction and extend to the viewer side, and are provided to block a part of light entering the semi-transmissive mirror from the viewer side. And a light shield of
A blind spot assisting device is provided, wherein each of the light shielding plates is arranged at equal intervals.

In the invention according to claim 2, preferably, the arrangement interval y of the light shielding plate is an interval of a value obtained by dividing the interval D between the eyes of the viewer by a natural number N.

In the invention according to claim 3, preferably, when the angle formed by the line of sight of the viewer with respect to the viewing surface of the semi-transmissive mirror is θ,
The arrangement interval y of the light shielding plates is (D×cos θ)/N.

In the invention according to claim 1, the blind spot auxiliary device includes a semi-transmissive mirror, a mirror facing the reflective surface of the semi-transmissive mirror with a gap, and a plurality of mirrors arranged on the viewer side of the semi-transmissive mirror. And the light-shielding plates of, and each of the light-shielding plates is arranged at equal intervals. Since the light-shielding plates are arranged at equal intervals, the distance between the light-shielding plate viewed by the viewer's left eye and the light-shielding plate viewed by the right eye of the viewer can be made constant. Therefore, it is possible to reduce the annoyance due to the difference in the arrangement interval of the light shielding plates that can be seen by the left and right eyes of the viewer and improve the visibility.

In the invention according to claim 2, the light-shielding plate arrangement interval y is an interval of a value obtained by dividing the distance D between the eyes of the viewer by a natural number N. When the viewer is looking at the distant view through the blind spot auxiliary device, the light shielding plates located closer to the distant view appear to be displaced from each other by the distance D between the left and right eyes. At this time, since the light-shielding plate arrangement interval y is set to a value obtained by dividing the distance D between the eyes of the viewer by the natural number N, the light-shielding plates that appear to be displaced from each other between the left eye and the right eye are located at the same position. It seems to overlap. For this reason, it is possible to reduce the number of light-shielding plates that can be seen by the left and right eyes together, reduce the inconvenience of visual recognition, and improve the visibility.

In the invention according to claim 3, when the angle formed by the line of sight of the viewer with respect to the viewing surface of the semi-transmissive mirror is θ, the arrangement interval y of the light shielding plates is (D×cos θ)/N, so Even if the line of sight of the viewer is tilted with respect to the visible surface of the mirror, the number of light-shielding plates that can be seen by the left and right eyes can be reduced, the complexity of visual recognition can be reduced, and the visibility can be improved.

FIG. 3 is a schematic view of the vicinity of a driver's seat of a vehicle equipped with the blind spot assist device according to the present invention. It is explanatory drawing explaining the principle of the blind spot auxiliary device shown by FIG. It is a figure explaining a blind spot auxiliary device of a comparative example and its operation. It is a figure explaining how a blind spot auxiliary device of a comparative example looks to a viewer. It is a figure explaining the operation of the blind spot auxiliary device of an example. It is a figure explaining how a blind spot auxiliary device of an example looks to a viewer.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the description, left and right refer to left and right with respect to an occupant (viewer) in the vehicle, and front and rear refer to front and rear with respect to the traveling direction of the vehicle. Further, in the figure, Le indicates left, Ri indicates right, Fr indicates front, Rr indicates rear, Up indicates upper, and Dn indicates lower.

As shown in FIG. 1, a vehicle 10 such as an automobile includes a left and right front pillars 11 and 11 at a front portion of a vehicle body, a windshield 12 provided between the left and right front pillars 11 and 11, and a left and right front pillars. The pillars 11 and 11 have left and right side glasses 13 and 13 provided at the rear ends thereof.

A steering wheel 15 and a seat (not shown) are arranged in a front portion of a vehicle compartment 14 located behind the windshield 12. Although a right-hand drive vehicle is illustrated below as an example of the vehicle 10, the present invention is not limited to this, and a left-hand drive vehicle may be used.

As shown in FIGS. 1 and 2, the viewer Mn (mainly the driver) in the vehicle compartment 14 directly sees the scenery outside the vehicle through the windshield 12 and the left and right side glasses 13, 13. You can However, in the region of the vehicle 10 where the left and right front pillars 11, 11 are arranged, the visual field of the viewer Mn is blocked, and the external scenery cannot be directly viewed. That is, the blind spot area Ad is generated. The left and right front pillars 11, 11 correspond to shields.

The blind spot assist device 20 according to the present invention is mounted on, for example, the vehicle 10. More specifically, the blind spot assist device 20 is fixed to, for example, the front pillar 11 that constitutes a part of the vehicle body. Here, the front pillar 11 can be referred to as a shield 11 that blocks a part of the visual field of the viewer Mn. The blind spot assisting device 20 projects an image of the object Oj in the blind spot area Ad that is blocked by the shield (front pillar) 11 and cannot be seen by the viewer Mn. Here, the object Oj includes living things such as humans, animals, and plants in addition to fixed objects.

The viewer Mn can visually recognize the image of the object Oj that has passed through the blind spot auxiliary device 20 by visually observing the blind spot auxiliary device 20, whereby the image of the object Oj in the area shielded by the front pillar 11 can be visually recognized. can do.

The blind spot assist device 20 may be fixed to a so-called front pillar (A pillar) 11 located in front of the occupant, or may be fixed to another pillar such as a B pillar or a C pillar. Further, as long as it blocks the visual field of the viewer Mn, it is possible to provide not only these objects. In addition, although the shield 11 is a pillar in the embodiment, the present invention is not limited to this, and it is commonly referred to as a black ceramic portion, and a band-shaped black color having a predetermined width that blocks light transmission provided on the entire periphery of the back surface of the windshield 12. A ceramic layer may be included in the shield 11.

The blind spot assist device 20 is arranged so as to face the front pillar 11 when viewed from the viewer Mn. That is, the blind spot assist device 20 is located near at least one of the left and right front pillars 11, 11 near the surface 11a on the vehicle interior 14 side (see FIG. 2).

Hereinafter, the blind spot assist device 20 will be described in detail. The blind spot assisting device 20 includes a semi-transmissive mirror 21, a mirror 22, and light shielding plates 31, 32, 33, 34. Hereinafter, both the semi-transmissive mirror 21 and the mirror 22 are collectively referred to as "a pair of mirrors 21 and 22" as appropriate.

The semi-transmissive mirror 21 is a so-called magic mirror that is located on the viewer Mn side and receives the light La representing the image of the object Oj, reflects part of the light La, and transmits the rest. The semi-transmissive mirror 21 has a plate shape and is formed as follows, for example. In the first example, a semi-transmissive reflective layer having a desired reflectance is formed by evaporating a metal such as aluminum on the surface of a base material made of a translucent resin material. In the second example, the surface of the base material is coated with a dielectric multilayer film to form a semi-transmissive reflective layer having a desired reflectance.

The mirror 22 faces the reflecting surface 21 a of the semi-transmissive mirror 21 with a space, and reflects the reflected light toward the semi-transmissive mirror 21. The mirror 22 is formed in a plate shape, and is an aluminum vapor deposition mirror in which a metal such as aluminum is vapor-deposited on the surface of a base material made of the above-mentioned translucent resin material.

The pair of mirrors 21 and 22 are positioned so that the reflecting surfaces 21a and 22a face each other. As shown in FIG. 2, when the vehicle 10 is viewed from above, one end surface 21b of the semitransparent mirror 21 and one end surface 22b of the mirror 22 are close to the glass surface 12a of the windshield 12 on the vehicle interior 14 side. .. The end 21c on the opposite side of the one end face 21b in the semi-transmissive mirror 21 is referred to as "the other end face 21c".

The semi-transmissive mirror 21 is displaced from the mirror 22 along the reflecting surface 22a of the mirror 22. That is, when the semi-transmissive mirror 21 is viewed from the in-plane direction Fa (direction Fa toward the plate surface of the semi-transmissive mirror 21. direction Fa perpendicular to the plate surface), the one end surface 21b of the semi-transmissive mirror 21 is reflected by the mirror 22. It is displaced from the surface 22a toward the glass surface 12a of the windshield 12. In other words, the semi-transmissive mirror 21 and the mirror 22 are positioned in a stepwise manner in the horizontal direction. Hereinafter, a portion 21d of the semi-transmissive mirror 21 that faces the reflection surface 22a of the mirror 22 is referred to as an "opposing portion 21d", and a portion 21e that does not face the reflection surface 22a of the mirror 22, that is, the semi-transmission mirror 21. The portion on the one end face 21b side is referred to as "non-opposing portion 21e".

Next, the arrangement structure of the light shielding plates 31, 32, 33, 34 will be described with reference to FIGS. 1, 2 and 5. The blind spot assist device 20 has upper and lower light shielding plate support portions 30. The light blocking plate support portion 30 is provided on the front pillar 11. The light shielding plate support portion 30 is provided with a plurality of light shielding plates 31, 32, 33, 34. The light shielding plates 31, 32, 33, 34 are arranged on the viewer Mn side of the semi-transmissive mirror 21, are long in the vertical direction and extend to the viewer Mn side, and are incident on the semi-transmissive mirror 21 from the viewer Mn side. The light blocking plate support portion 30 is provided so as to block a part of the light Lb that is blocked. The extending directions of the light shielding plates 31, 32, 33, and 34 are substantially the same as the line-of-sight direction when the viewer Mn looks at the blind spot assist device 20.

When the viewer Mn looks at the vicinity of the center of the blind spot assist device 20, the light shielding plates 31, 32, 33, 34 are arranged at equal intervals. Specifically, the direction connecting the middle point (viewpoint Pi) of the left eye EL and the right eye ER to the central part of the blind spot auxiliary device 20 is set as the line-of-sight direction, and a perpendicular line PL to the line-of-sight direction is drawn at the central part of the blind spot auxiliary device 20, The distance between the intersections with the lines toward the light shielding plates 31, 32, 33, 34 is y. At this time, the arrangement interval y of the light blocking plates 31, 32, 33, 34 is an interval of a value obtained by dividing the interval D between the eyes of the viewer (see FIG. 5) by the natural number N.

Specifically, when a straight line connecting the midpoints of the left eye EL and the right eye ER and the intersections of the lines toward the light shielding plates 31, 32, 33, 34 is drawn, the angles β formed by the adjacent straight lines are equal. In this way, it is approximately related that the angles β formed by the respective light shielding plates 31, 32, 33, and 34 are equal to each other.

When the angle formed by the line of sight of the viewer Mn with respect to the viewing surface 21f of the semi-transmissive mirror 21 is θ, the arrangement interval y of the light shielding plates 31, 32, 33, 34 is (D×cos θ)/N. ..

Further, the light blocking plates 31, 32, 33, 34 have a function of blocking the external light Lb incident on the pair of mirrors 21, 22 from the viewer Mn side at a predetermined approach angle.

Next, the basic principle of the blind spot assist device 20 will be described with reference to FIG. 2 shows a state in which the viewer Mn is seated in the driver's seat, and the viewpoint Pi shows the viewpoint (eyepoint) of the viewer Mn.

In the front view of the viewer Mn (viewpoint Pi), a blind spot area Ad blocked by the front pillar 11 is generated. Therefore, the object Oj existing in the blind spot area Ad cannot be directly visually recognized from the viewpoint Pi.

On the other hand, the light La (light La representing an image) traveling from the object Oj to the pair of mirrors 21 and 22 is incident on the non-opposing portion 21e of the reflecting surface 21a of the semi-transmissive mirror 21. Therefore, the light La from the object Oj is repeatedly reflected between the pair of mirrors 21 and 22, and a part of the light La is emitted from the pair of mirrors 21 and 22 (that is, a part of the light La is half). (Transmits through the transmission mirror 21). A part of the light La emitted from the pair of mirrors 21 and 22 reaches the viewpoint Pi. Therefore, from the viewpoint Pi, the image of the object Oj reflected on the mirror 22 can be visually recognized through the semi-transmissive mirror 21 continuously with the scenery directly visible.

It should be noted that, in the blind spot region Ad, a slight region on the back side of the front pillar 11 (a portion indicated by hatching in FIG. 2) cannot allow light from this region to enter the pair of mirrors 21 and 22, and thus the object Oj of the object Oj. This is a so-called invisible area where an image cannot be projected by the pair of mirrors 21 and 22.

Further, the reflecting surface 21a of the semi-transmissive mirror 21 is not parallel to the reflecting surface 22a of the mirror 22, but is inclined by a predetermined tilt angle α in the direction of opening to the viewer Mn side. This inclination angle α is hereinafter referred to as “opening angle α”. The inclination direction of the reflecting surface 21a of the semi-transmissive mirror 21 is a direction in which the distance between the reflecting surfaces 21a and 22a increases as one end surface 21b of the semi-transmissive mirror 21 moves toward the other end surface 21c.

The incident angle at which the light La representing the image is incident on the non-opposing portion 21e in the reflecting surface 21a of the semi-transmissive mirror 21 is referred to as "first incident angle". The emission angle at which the light La representing the image is emitted from the pair of mirrors 21 and 22 toward the viewpoint Pi after being repeatedly reflected between the reflection surfaces 21a and 22a is referred to as a "final emission angle". The final exit angle is greater than the initial incident angle. Therefore, by appropriately setting an arbitrary opening angle α in advance, the light La (light ray La) that is incident from the object Oj onto the reflecting surface 21a of the semi-transmissive mirror 21 at the first incident angle is equal to the viewpoint Pi and the object. It intersects a straight line Lp connecting Oj. Therefore, when the viewer Mn visually recognizes the image of the object Oj, there is no deviation between the image reflected on the mirror 22 and the front scene directly visually recognized.

Although the opening angle α is provided in the embodiment, the invention is not limited to this, and the opening angle α=0 and the reflecting surface 21a of the semi-transmissive mirror 21 may be arranged in parallel with the reflecting surface 22a of the mirror 22. Good.

Next, the configuration of the blind spot assisting device 100 of the comparative example and the operation of the light shielding plates 101, 102, 103, 104, 105 will be described with reference to FIGS. 3 and 4. As shown in FIG. 3, the blind spot auxiliary device 100 of the comparative example includes a semi-transmissive mirror 121, a mirror 122, and a plurality of light shielding plates 101, 102, 103, 104, 105. The configurations of the semi-transmissive mirror 121 and the mirror 122 of the comparative example are the same as the configurations of the semi-transmissive mirror 21 and the mirror 22 (see FIG. 2) of the example.

The plurality of light shielding plates 101, 102, 103, 104, 105 of the comparative example are arranged at different intervals. The distance between the light shielding plate 101 and the light shielding plate 102 is x1, the distance between the light shielding plate 102 and the light shielding plate 103 is x2, the distance between the light shielding plate 103 and the light shielding plate 104 is x3, and the distance between the light shielding plate 104 and the light shielding plate 105 is x4, which are arranged at different intervals such that x1>x2>x3>x4.

The arrangement intervals x1, x2, x3, and x4 of the light shielding plates 101, 102, 103, 104, and 105 of the comparative example are all different from the value obtained by dividing the distance D on both sides of the viewer Mn by a natural number. Further, when the angle formed by the line of sight of the viewer Mn with respect to the viewing surface 121f of the semi-transmissive mirror 121 is θ, the arrangement intervals x1, x2, x3, x4 of the light shielding plates 101, 102, 103, 104, 105 are all Also differs from the value obtained by the formula of (D×cos θ)/N.

When the viewer Mn sees the image of the blind spot area Ad through the blind spot auxiliary device 100 of the comparative example, the light blocking plates 101, 102, 103, 104 are provided between the images of the left eye EL and right eye ER of the viewer Mn and the blind spot Ad. Is located, the viewer Mn sees the plurality of light shielding plates 101, 102, 103, 104 when viewing the image of the blind spot area Ad.

At this time, as shown in FIG. 4, since the positions of the light shielding plates 101, 102, 103, 104 are closer to the eyes than the image, the viewer Mn is left eye due to the parallax between the left eye EL and the right eye ER. Light-shielding plates 101L, 102L, 103L, 104L (L is a symbol representing left) are visually recognized in EL, and light-shielding plates 101R, 102R, 103R, 104R (R is a symbol representing right) are visually recognized in right eye ER. The viewer Mn visually recognizes the plurality of light blocking plates 101L, 102L, 103L, 104L, 101R, 102R, 103R, 104R by the left eye EL and the right eye ER, and the number of light blocking plates 101, 102, 103, 104 is larger than the actual number. The field of view becomes annoying because many are visible.

On the other hand, the operation of the light shielding plates 31, 32, 33, 34 of the blind spot assist device 20 of the embodiment will be described with reference to FIGS. 5 and 6. As shown in FIG. 5, each of the plurality of light shielding plates 31, 32, 33, 34 of the embodiment is arranged at equal intervals y. The distance between the light shielding plate 31 and the light shielding plate 32, the distance between the light shielding plate 32 and the light shielding plate 33, and the distance between the light shielding plate 33 and the light shielding plate 34 are all equal in y.

When the viewer Mn views the image of the blind spot area Ad via the blind spot assisting device 20 of the embodiment, the light shield plates 31, 32, 33, 34 are provided between the images of the left eye EL and the right eye ER of the viewer Mn and the blind spot area Ad. Is located, the viewer Mn sees the plurality of light shielding plates 31, 32, 33, 34 when viewing the image of the blind spot area Ad.

At this time, as shown in FIG. 6, since the positions of the light shielding plates 31, 32, 33, and 34 are closer to the eyes than the images, the viewer Mn is affected by the parallax between the left eye EL and the right eye ER. Light-shielding plates 31L, 32L, 33L, 34L (L is a symbol representing left) are visually recognized in EL, and light-shielding plates 31R, 32R, 33R, 34R (R is a symbol representing right) are visually recognized in right eye ER.

However, the arrangement interval y of the light shielding plates 31, 32, 33, and 34 of the embodiment is an interval of a value obtained by dividing the interval D between both surfaces of the viewer Mn by the natural number N.

Therefore, the light blocking plates 31, 32, 33, and 34 appear to be displaced from each other by the distance D between the eyes of the left eye EL and the right eye ER. Since the intervals are divided by N, the positions 31L, 32L, 33L, 34L seen by the left eye EL and 31R, 32R, 33R, 34R seen by the right eye RL are exactly the same position. Therefore, it is possible to reduce the number of light-shielding plates 31, 32, 33, and 34 that can be seen together by the left eye EL and the right eye ER, reduce the inconvenience of visual recognition, and improve the visibility.

Specifically, for example, the distance between both surfaces is set to D, and the light shielding plates 31, 32, 33, 34 are arranged in accordance with the distance of 1/2 with respect to this D. When the left eye EL and the right eye ER of the viewer are looking at the distant view in such a setting, the light shielding plates 31, 32, 33, and 34 existing nearer to them are seen to be shifted by two from each other. Furthermore, since the two sheets appear to overlap at exactly the same position in a state where they are offset, the number of light-shielding plates 31, 32, 33, 34 seen by both eyes does not double to the left and right, and the visibility is bothered. Can be reduced.

Note that, in the above-described specific examples, for the sake of convenience of description, the viewer is facing forward, but when the blind spot auxiliary device 20 is actually viewed, the blind spot is often tilted (semi-transparent mirror). The angle formed by the viewer's line of sight with respect to the viewing surface 21f of 21 is θ). In this case, the arrangement interval y of the light shielding plates 31, 32, 33, 34 is calculated by the formula (D×cos θ)/N. It may be set to a value that can be set.

In addition, although the distance between the eyes is D in the embodiment, the distance D between the eyes is generally 60 cm to 70 cm. Further, the distance from the viewer to the blind spot auxiliary device 20 and the angle θ formed by the position of the seat in the passenger compartment and the posture of the viewer Mn are different, but the distance D between the eyes is in the range of 60 cm to 70 cm, which is common. The preferred application range of the present invention is the range of movement of the seat of the vehicle and the posture of the viewer.

Further, in the embodiment, the number of the light shielding plates 31, 32, 33, 34 is set to four, but the number is not limited to this, and any number such as three, five, or six may be used. Further, in the embodiment, the amount of extension of each of the light shielding plates 31, 32, 33, 34 from the visible surface 21f of the semi-transmissive mirror 21 to the end on the viewer Mn side is made smaller from the back to the front. For example, the protrusion amount may be different for each of the light shielding plates 31, 32, 33, 34, and the protrusion amount may be the same as long as it has a function of shielding the external light Lb.

INDUSTRIAL APPLICABILITY The present invention is suitable for a blind spot auxiliary device for visually recognizing an image in an area shielded by a shield.

11... Shield (front pillar), 20... Blind spot auxiliary device, 21... Semi-transmissive mirror, 21f... View surface, 22... Mirror, 31, 32, 33, 34... Shading plate, Mn... Viewer, Oj... Object, Ad... Blind spot area, La... Light, D... Distance between eyes, y... Arrangement of light-shielding plate, N... Natural number, θ... Angle formed by viewer's line of sight with respect to viewing surface of semi-transmissive mirror, PL... Blind spot auxiliary device Perpendicular to the line of sight at the center of the.

Claims (3)

A blind spot auxiliary device for projecting an image of an object in a blind spot area which is blocked by a shield and cannot be seen by a viewer.
A plate-shaped semi-transmissive mirror that is located on the viewer side and that receives the light representing the image, reflects a part of the light, and transmits the rest.
A plate-like mirror that faces the reflective surface of the semi-transmissive mirror with a space, and reflects the reflected light toward the semi-transmissive mirror,
A plurality of units that are arranged on the viewer side of the semi-transmissive mirror, are long in the vertical direction and extend to the viewer side, and are provided to block a part of light entering the semi-transmissive mirror from the viewer side. And a light shield of
The blind spot auxiliary device, wherein each of the light shielding plates is arranged at equal intervals. The blind spot auxiliary device according to claim 1, wherein the arrangement interval of the light shielding plates is an interval of a value obtained by dividing an interval D between the eyes of the viewer by a natural number N. When the angle formed by the line of sight of the viewer with respect to the viewing surface of the semi-transparent mirror is θ,
The blind spot assist device according to claim 2, wherein the arrangement interval of the light shielding plates is (D×cos θ)/N.

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