JP6697751B2 - Vehicle display system, electronic mirror system and moving body - Google Patents

Description

The present disclosure relates generally to a vehicle display system, an electronic mirror system, and a moving body, and more particularly to a vehicle display system, an electronic mirror system, and a moving body that display an image based on a captured image.

  BACKGROUND ART Conventionally, there is known an electronic mirror system including an image pickup device that picks up an image of the rear or side of a vehicle, and a display device that displays a video signal output from the image pickup device as an image (Patent Document 1). Here, the display device is installed inside the vehicle at a position where the driver can easily see the image on the display device. The display device is composed of a liquid crystal display or the like.

JP, 2009-83618, A

  With the electronic mirror system described in Patent Document 1, it is difficult for a person who sees an image displayed on a liquid crystal display to obtain a stereoscopic effect.

An object of the present disclosure is to provide a vehicle display system, an electronic mirror system, and a moving body that can give a viewer a stereoscopic effect on a displayed image.

A vehicle display system according to an aspect of the present disclosure includes a display surface and a concave mirror. On the display surface, an image based on a captured image from an imaging device mounted on the vehicle is displayed. The concave mirror reflects only a partial area of the image displayed on the display surface as a reflection image. In the vehicular display system , the size of the concave mirror is determined such that the size of the virtual image corresponding to the entire display surface is larger than the size of the virtual image corresponding to the visual field of the subject who views the concave mirror. It is .

An electronic mirror system according to an aspect of the present disclosure includes the vehicle display system described above, and an imaging device that outputs the captured image to the vehicle display system.

A mobile body according to an aspect of the present disclosure includes the electronic mirror system described above and a vehicle on which the electronic mirror system is mounted.

  The present disclosure has an advantage that a viewer of a displayed image can be given a stereoscopic effect.

FIG. 1 is a conceptual diagram of an automobile including the display system according to the first embodiment. FIG. 2 is a conceptual diagram illustrating the focus of the eyes of the user when the display system described above is used. FIG. 3 is a conceptual diagram illustrating the position of a display mirror in an automobile to which the above display system is applied. FIG. 4 is a conceptual diagram showing the relationship between the visual field of the user of the display system and the virtual image of the image displayed on the display surface. FIG. 5A is a conceptual diagram showing the relationship between the visual field of the user of the display system and the virtual image of the image displayed on the display surface. FIG. 5B is a conceptual diagram of a relative positional relationship between an image and an image reflected by a display mirror in the display system of the above. FIG. 6A is a conceptual diagram showing the relationship between the visual field of the user of the display system and the virtual image of the image displayed on the display surface. FIG. 6B is a conceptual diagram of a relative positional relationship between the image in the display system and the image reflected by the display mirror. FIG. 7 is a conceptual diagram showing the relationship between the visual field of the user of the display system according to the comparative example and the virtual image of the image displayed on the display surface. FIG. 8 is a conceptual diagram showing the relationship between the visual field of the user of the display system and the virtual image of the image displayed on the display surface. FIG. 9 is a conceptual diagram illustrating the position of the display mirror in the automobile to which the display system according to the first modified example of the first embodiment is applied. FIG. 10: is a conceptual diagram which shows the relationship of a user's visual field of the display system same as the above, and the virtual image of the image displayed on a display surface. FIG. 11 is a conceptual diagram showing the relationship between the visual field of the user of the above display system and the virtual image of the image displayed on the display surface. FIG. 12A is a conceptual diagram showing a relative positional relationship between an image displayed on the display surface of the display system according to the first modification of the first embodiment and a reflection image. FIG. 12B is a conceptual diagram showing a relative positional relationship between the image displayed on the display surface of the display system according to the first modification of the first embodiment and the reflection image. FIG. 12C is a conceptual diagram showing a relative positional relationship between an image displayed on the display surface of the display system according to the first modified example of the first embodiment and a guide pattern image. FIG. 12D is a conceptual diagram showing a relative positional relationship between an image displayed on the display surface of the display system according to the first modified example of the first embodiment and the guide pattern. FIG. 13 is a conceptual diagram showing the configuration of the display system according to the second embodiment.

  1 to 13 described in the following embodiments and the like are conceptual diagrams, and the ratio of the size and thickness of each constituent element in the drawings does not necessarily reflect the actual dimensional ratio. ..

(Embodiment 1)
(1) Outline As shown in FIG. 1, the display system 10 according to the present embodiment is, for example, a system used for a vehicle 100 as a moving body.

  The display system 10 is mounted on a main body (moving body main body) 110 of an automobile 100. In the display system 10, when the image P1 (see FIG. 5B) based on the captured image is displayed on the display surface 21, an image (hereinafter, also referred to as a reflection image) P2 reflected by the display mirror 3 (see FIG. 5B) is displayed. The user 200 (driver of the automobile 100) who is the target person who looks at the display mirror 3 sees it. The display mirror 3 is a front portion of the ceiling portion 101 of the main body 110, which is close to the windshield 102 (the windshield), and the user 200 seated on the front seat 103 comes into the field of view of the user 200 with the user facing forward. It is located in the position (see FIG. 1). The captured image is output from a camera (imaging device) 90 that captures the rear of the automobile 100. The camera 90 is mounted on the main body 110 of the automobile 100. Since the user 200 sees the reflected image P2 on the display mirror 3, the user 200 needs to view the display surface 21 in a space farther than the display mirror 3 with respect to his/her own eye (eyeball) 201 (see FIG. 2). It looks as if a part of the image P1 is displayed. That is, the virtual image 301 (see FIGS. 2 and 5A) of the image P1 on the display surface 21 is displayed to the user 200 at a position in front of the automobile 100 in the direction in which the display mirror 3 is viewed from the user 200. looks like.

  By the way, in the electronic mirror system described in Patent Document 1, a driver of an automobile views a real image of an image displayed on a display device including a liquid crystal display. Therefore, for the driver, for example, the distance between the distance to the position where the eyes are focused when viewing the road conditions in front of the vehicle and the distance to the position where the eyes are focused when viewing the image on the display device. Since the difference is large, the amount of focus adjustment is large, and the time for focusing (focusing) is long.

  On the other hand, in the display system 10, as shown in FIG. 2, the distance L1 to the position where the eye 201 is focused when the road condition in front of the automobile 100 is viewed and the eye 201 is focused when the virtual image 301 is viewed. The distance difference ΔL from the distance L2 to the matching position becomes small. Therefore, in the display system 10, the focus adjustment amount of the user 200 can be reduced, and the focusing time of the user 200 can be shortened. Further, in the display system 10, even when the user 200 has difficulty in focusing on a relatively short distance due to old age, hyperopia, etc., the focus adjustment becomes easy.

  The display system 10 is configured such that the position of the reflection image P2 displayed as the virtual image 301 is changed in the distance as the viewpoint of the user 200 (eye 201 of the user 200) looking at the display mirror 3 moves. As a result, in the display system 10, compared to the case where the driver directly views the display device that displays the video signal output from the imaging device as an image, the stereoscopic image of the other vehicle behind the user 200 who sees the image to be displayed. There is an advantage that it is possible to give a feeling.

(2) Configuration (2.1) Overall Configuration of Display System As shown in FIGS. 1 to 6B, the display system 10 according to the present embodiment includes a display unit (image forming unit) 2 having a display surface 21, and a display unit. And a mirror 3. Further, the display system 10 further includes a control unit (not shown) that controls the display unit 2.

  The image P1 based on the captured image output from the camera 90 is displayed on the display surface 21. The camera 90 is not a component of the display system 10. The image sensor in the camera 90 is a CMOS (Complementary MOS) image sensor. The image pickup device is not limited to the CMOS image sensor, and may be, for example, a CCD (Charge Coupled Device) image sensor.

  The display unit 2 outputs light that forms an image. As shown in FIG. 2, the display unit 2 includes a liquid crystal panel 22 (LCD: Liquid Crystal Display) and a light source device 23. The liquid crystal panel 22 is arranged in front of the light source device 23. The light source device 23 is used as a backlight of the liquid crystal panel 22. The light source device 23 is a so-called surface light source. The light source device 23 is a side light type light source device using a solid-state light emitting element such as a light emitting diode or a laser diode. The light from the light source device 23 passes through the liquid crystal panel 22 and is output from the display surface 21 of the display unit 2. The light output from the display surface 21 is light that reflects the image displayed on the liquid crystal panel 22. In FIG. 2, a traveling path (optical path OP) of light (output light) output from one point (a certain pixel point) of the image P1 displayed on the display surface 21 of the display unit 2 is schematically illustrated.

  In the display system 10, the vertical direction of the liquid crystal panel 22 is the vertical direction of the reflection image P2, and the horizontal direction of the liquid crystal panel 22 is the horizontal direction of the reflection image P2. The vertical direction of the reflection image P2 (see FIGS. 5B and 6B) is the vertical direction of the virtual image 300 (see FIGS. 5A and 6A) (the direction orthogonal to the paper surface of each of FIGS. 5A and 6A), that is, the vertical direction within the visual field of the user 200. It is a direction along the direction. The horizontal direction of the reflection image P2 is the horizontal direction of the virtual image 300 of the image P1, that is, the direction along the horizontal direction within the visual field of the user 200.

  The control unit controls the display unit 2 (the liquid crystal panel 22 and the light source device 23). Here, the control unit acquires the captured image output from the camera 90 and causes the display unit 2 to display the image P1 based on the captured image. The captured image is an image generated by the camera 90 mounted on the rear portion of the automobile 100 capturing the rear of the automobile 100. As an example, the control unit causes the display unit 2 to display the acquired captured image as it is as the image P1. Here, the camera 90 is arranged at the center of the rear part of the automobile 100 in the left-right direction. As a result, the camera 90 can image a range behind the camera 90 (in the field of view FV9 of the camera 90 in FIG. 1 ). The display system 10 can be applied to the electronic mirror system 80. The electronic mirror system 80 includes the display system 10 and a camera 90 that outputs a captured image to the display system 10. The electronic mirror system 80 can be used as an inside mirror of the automobile 100.

  The control unit is composed of, for example, a microcomputer having CPU (Central Processing Unit) and memory as main components. In other words, the control unit is realized by a computer having a CPU and a memory, and the computer functions as the control unit when the CPU executes the program stored in the memory. Although the program is recorded in advance in the memory of the control unit here, it may be provided through an electric communication line such as the Internet or in a recording medium such as a memory card.

  The display mirror 3 is a concave mirror. The display mirror 3 includes, for example, a glass base material and a reflective film formed on the concave surface of the base material. The reflective film is, for example, a metal film.

  The display mirror 3 reflects the image P1 displayed on the display surface 21. The display mirror 3 in the display system 10 reflects only a partial area of the image P1 displayed on the display surface 21 as a reflection image P2.

  In the display system 10, as shown in FIG. 4, the size of the virtual image 300 with respect to the entire image P1 on the virtual plane in the space away from the user 200 is determined by the display mirror 3 and the visual field VF2 of the eye 201 of the user 200. The size of the display mirror 3 is determined so as to be larger than (see FIG. 4). Here, in the display system 10, the size of the display mirror 3 is determined so that the outer peripheral line of the visual field VF2 is located inside the outer peripheral line of the virtual image 300 on the virtual plane. Thereby, the display system 10 is configured so that the position of the reflection image P2 changes with the movement of the eye 201 of the user 200 (target person) who views the display mirror 3 (FIGS. 5A, 5B, 6A, and 6B). reference). Here, the reflection image P2 has a smaller number of pixels than the image P1 in both the vertical direction and the horizontal direction of the image P1.

  Hereinafter, for convenience of description, the two eyes 201 of the user 200 may be referred to as a right eye 201R and a left eye 201L in order to distinguish them from each other. Further, in the following description of FIGS. 5A and 6A, “right side” means the right side when viewed from the user 200, and “left side” means the left side when viewed from the user 200.

  FIG. 5A is a conceptual diagram when the midpoint of the straight line connecting the right eye 201R and the left eye 201L of the user 200 and the center of the display surface 21 are located within the plane of one vertical plane VP. FIG. 6A is a conceptual diagram when the midpoint of the straight line connecting the right eye 201R and the left eye 201L of the user 200 moves to the right from the position in FIG. 5A and the right eye 201R moves to the right end of the eye box 203. .. The “eye box 203” here is a range in which the user 200 can visually recognize the image without missing. More specifically, the “eye box 203” is a viewpoint range in which a part of the virtual image 300 is reflected in the entire visual field of the eye 201. In the display system 10, if the eye 201 of the user 200 is within the range of the eye box 203, the reflection image P2 falls within the image P1 as shown in FIGS. 5B and 6B.

  Further, as shown in FIGS. 5A and 6A, a virtual image 301 formed by reflecting a part of the image P1 by the display mirror 3 is a comparative example of the entire image P1 displayed on the display surface 21 (described later). It becomes a part of the virtual image 300 formed when reflected by the concave mirror 30 of FIGS. 7 and 8. Here, in FIG. 5A, the central portion of the entire virtual image 300 becomes a virtual image 301 seen by the user 200 in each of the vertical direction and the horizontal direction.

  In FIG. 5A, the range of the virtual image 301 that can be seen by the right eye 201R of the user 200 in the virtual image 300 is shown. The range of the virtual image 301 seen by the left eye 201L of the user 200 is plane-symmetric with the range of the virtual image 301 seen by the right eye 201R with reference to the vertical plane VP.

  As shown in FIG. 6A, when the midpoint of the straight line connecting the right eye 201R and the left eye 201L of the user 200 moves to the right as compared to the position shown in FIG. 5A, the range of the virtual image 301 seen by the right eye 201R of the user 200. Moves to the left. In FIG. 6A, the right eye 201R of the user 200 is located at the right end 203R of the eye box 203, and the left end 301L of the virtual image 301 seen by the right eye 201R of the user 200 matches the left end 300L of the virtual image 300.

  Contrary to FIG. 6A, when the midpoint of the straight line connecting the right eye 201R and the left eye 201L of the user 200 moves to the left side compared to the position shown in FIG. 5A, the range of the virtual image 301 seen by the left eye 201L of the user 200. Moves to the right. When the left eye 201L of the user 200 moves to the left end 203L of the eye box 203, the right end 301R of the virtual image 301 seen by the left eye 201L of the user 200 matches the right end 300R of the virtual image 300.

  Therefore, in the display system 10, when the user 200 moves his/her face in the left/right direction, as with the case where the user 200 looks at the inside mirror, the right eye 201R and the left eye 201L respectively see the user 200 as the face moves. The range of the virtual image 301 changes. Here, if the right eye 201R and the left eye 201L of the user 200 are inside the eye box 203, the image is not seen as missing.

  Further, in the display system 10, even when the user 200 moves his/her face up and down, as with the case where the user 200 looks at the inside mirror, the right eye 201R and the left eye 201L respectively move with the movement of the face of the user 200. The range of the visible virtual image 301 changes. That is, if the face of the user 200 moves to the upper side, the range of the virtual image 301 viewed by the right eye 201R and the left eye 201L moves to the lower side, and if the face of the user 200 moves to the upper side, the right eye 201R and the left eye 201R. The range of the virtual image 301 that can be seen by each of the eyes 201L moves to the upper side. Here, if the right eye 201R and the left eye 201L of the user 200 are inside the eye box 203, the image is not seen as missing.

  Here, the display system 11 according to the comparative example will be described with reference to FIGS. 7 and 8.

  The display system 11 of the comparative example is a head-up display (HUD). The display system 11 includes a display unit 20 and a concave mirror 30 instead of the display unit 2 and the display mirror 3 of the first embodiment. In the display system 11, as shown in FIGS. 7 and 8, if the viewpoint of the user 200 is within the eye box 203, even if the eye 201 of the user 200 moves, the display is displayed on the display surface 211 of the display unit 20. The virtual image 300 of the entire image and the virtual image 311 formed by reflecting the image by the concave mirror 30 are the same.

  On the other hand, in the display system 10 according to the present embodiment, the display mirror 3 reflects only a partial area of the image P1 displayed on the display surface 21 as the reflection image P2. Here, the display system 10 is configured such that the position of the reflection image P2 changes as the viewpoint of the user 200 who views the display mirror 3 moves. As a result, the display system 10 has an advantage that it is possible to give the user 200 a stereoscopic effect, as compared with the case where the driver directly views the display device that displays the video signal output from the imaging device as an image. is there.

  In the display system 10, the resolution of the image P1 displayed on the display surface 21 is preferably higher than the limit resolution of the virtual image 300 at the display position of the virtual image 300. Here, the “limit resolution of the virtual image 300 at the display position of the virtual image 300” (hereinafter, simply referred to as “limit resolution”) is a value determined by the visual distance from the eye 201 of the user 200 to the virtual image 300 and the visual acuity of the user 200. The limit resolution is a limit value of the resolution with which the human eye can identify, and can be obtained based on, for example, the gap of the Landolt ring used for a visual acuity test. The longer the viewing distance, the lower the limit resolution, and the better the visual acuity of the user 200, the higher the limit resolution. The limit resolution can be obtained from a predetermined calculation formula using the value of the visual distance from the eye 201 of the user 200 to the virtual image 300 and the value of the visual acuity of the user 200. In the display system 10 of the present embodiment, since the display mirror 3 magnifies and displays a part of the image on the display surface 21, if the limit resolution is determined, the resolution of the image P1 on the display surface 21 is determined according to the limit resolution. Is determined, and the resolution of the image P1 is set to a value higher than the limit resolution. If the resolution of the image P1 on the display surface 21 is determined in this way, the virtual image 300 having a resolution higher than the limit resolution is displayed at the display position of the virtual image 300, and the user 200 looking at the virtual image 300 looks at the mirror. You can feel the depth and stereoscopic effect of the virtual image 300 as you see. In particular, since the high-definition image moves as the vehicle 100 moves while the vehicle 100 is traveling, the user 200 can feel a more stereoscopic effect.

  The display system 10 is not limited to the case where the display mirror 3 is arranged in the front direction of the user 200 as shown in FIGS. 3, 5A, 5B, 6A, and 6B, and for example, the first shown in FIGS. As in the modified example, the display mirror 3 may be disposed diagonally to the left and slightly forward to the left with respect to the front direction of the user 200. 10 and 11, both the left eye 201L and the right eye 201R of the user 200 are looking diagonally forward left.

  FIG. 10 shows the range of the virtual image 301 that can be seen by the right eye 201R of the user 200 in the virtual image 300. FIG. 11 shows the range of the virtual image 301 that can be seen by the left eye 201L of the user 200 in the virtual image 300. In any case, the virtual image 301 is smaller than the virtual image 300.

  In the display system 10, the housing 28 in which the display unit 2 and the control unit are housed and the housing 38 in which the display mirror 3 is housed are separate bodies, but the present invention is not limited to this. The unit 2, the control unit, and the display mirror 3 may be housed in one housing.

  In the display system 10, the reflectance and the transmittance of the display mirror 3 may be 80% and 20%, respectively, and a display device that displays a warning icon may be arranged on the back surface of the display mirror 3. This ensures that the warning icon can be visually recognized even if the viewpoint of the user 200 moves.

(2.2) Operation of Electronic Mirror System The operation of the electronic mirror system 80 will be described.

  For example, when electric power is supplied from the battery of the automobile 100 to the electronic mirror system 80 and a control signal for starting operation of the electronic mirror system 80 is input from an ECU (Electronic Control Unit), the electronic mirror system 80 starts operating. ..

  For example, when a control signal is input to the control unit from the ECU of the automobile 100, the control unit causes the camera 90 to image the rear of the automobile 100 at a predetermined frame rate and acquires image data of a captured image from the camera 90.

  When the image data of the captured image is input from the camera 90, the control unit displays the image P1 based on the captured image on the display surface 21 of the display unit 2.

(3) Guide pattern used when adjusting the position of the display mirror FIG. 12A shows an image P1 and a reflection image P2 displayed on the display surface 21 based on the captured image in the display system 10 according to the first modification. Shows the relative positional relationship of. As shown in FIG. 12A, the reflection image P2 is smaller than the image P1 and corresponds to a part of the image P1 (hereinafter, also referred to as a partial image). In the display system 10 according to the first modification, it is preferable that the reflection image P2 corresponds to the partial image in the substantially central region of the image P1 as shown in FIG. 12A.

  However, for example, when the position of the display mirror 3 is adjusted by the user 200 (see FIG. 1), the reflection image P2 has a large deviation from the central area of the image P1 as shown in FIG. 12B. It can be an image. Therefore, in the display system 10 according to the first modification, for example, as shown in FIG. 12C, when the position of the display mirror 3 is adjusted by the user 200 on the image P1 (in other words, the relative position of the reflection image P2 with respect to the image P1). A guide pattern P3, which serves as a guide for adjusting the appropriate position), may be displayed. In this case, for example, the control unit may have a function of superimposing the image of the guide pattern P3 on the image P1. In the example of FIG. 12C, the guide pattern P3 is a pattern of a triple frame (rectangular frame), and the size of the innermost frame is determined so that the reflection image P2 fits inside the innermost frame. Is preferred. The guide pattern P3 may be a single frame or a double frame as long as it is a pattern that can be distinguished from the image P1, and a plurality of frames having different colors (for example, three frames are formed) so that the user 200 can easily recognize them. It may be a red frame, a yellow frame, or a green frame). Further, the guide pattern P3 is not limited to a pattern that surrounds the partial image over the entire circumference like a rectangular frame, and for example, as shown in FIG. 12D, the triple frame is shown so as to indicate a position that becomes a vertical and horizontal limit. The pattern may be a part of each of the four sides of the (rectangular frame).

  In the display system 10 according to the first modified example, by displaying the guide pattern P3, the user 200 prevents the region corresponding to the reflection image P2 in the image P1 from being too biased from the central region of the image P1. The position of can be adjusted.

  The display system 10 according to the first modification may be configured to switch whether or not to display the guide pattern P3 for adjusting the position of the reflection image P2 in the image P1 on the display surface 21. In this case, in the display system 10 of the first modified example, for example, the control unit switches whether to display the guide pattern P3 for adjusting the position of the reflection image P2 in the image P1 on the display surface 21. Here, in the display system 10 of the first modified example, for example, a touch sensor is provided in the housing 28 that houses the display mirror 3, and the control unit displays the guide pattern P3 based on the output of the touch sensor. It may be configured to switch whether or not. In the display system 10 according to the first modification, for example, the control unit may be configured to switch whether or not to display the guide pattern P3 based on the voice of the user 200.

(4) Other Modifications The first embodiment is just one of various embodiments of the present disclosure. The first embodiment can be variously modified according to the design and the like as long as the object of the present disclosure can be achieved.

  For example, the display unit 2 is not limited to the configuration including the liquid crystal panel 22 and the light source device 23. The display unit 2 may be configured to draw an image on the screen by scanning the diffuse transmission screen with laser light from behind the screen, for example. Further, the display unit 2 may be configured to project an image on a diffuse transmission screen from behind the screen by a projector. Further, the display unit 2 may be a self-luminous display panel including an OLED (Organic Light Emitting Diode) or the like.

  The image based on the captured image is not limited to the captured image itself, and may be, for example, an image obtained by performing image processing on the captured image or a CG (Computer Graphics) image created based on the captured image. For example, since the image captured by the camera 90 becomes dark at night, the image based on the captured image may be an image obtained by performing brightness correction on the image captured by the camera 90. The image based on the captured image may be an image in which an obstacle is extracted from the image captured by the camera 90 and a CG (Computer Graphics) image indicating the obstacle is superimposed on the captured image.

  In the display system 10, the number of pixels in the vertical direction of the reflected image P2 is smaller than the number of pixels in the vertical direction of the image P1, and the number of pixels in the horizontal direction of the reflected image P2 is smaller than the number of pixels in the horizontal direction of the image P1. However, it is not limited to this. For example, in the display system 10, the number of pixels in one of the vertical direction and the horizontal direction of the reflected image P2 may be smaller than the number of pixels in the corresponding direction (vertical direction or horizontal direction) in the image P1.

  Further, in the automobile 100, the camera 90 may be arranged on the rear side of the automobile 100 so as to capture an image in a range visible by a conventional door mirror or fender mirror. In this case, the electronic mirror system 80 may be used as a rear confirmation mirror instead of the conventional door mirror or fender mirror.

  Further, the moving body to which the electronic mirror system 80 is applied is not limited to the automobile 100. For example, the electronic mirror system 80 can be applied to a moving body other than the automobile 100 such as a motorcycle, a train, an aircraft, a construction machine, and a ship. In short, the main body of the moving body is not limited to an automobile vehicle, but may be a main body of a moving body other than the automobile 100 such as a motorcycle, a train, an aircraft, a construction machine, and a ship. Furthermore, the electronic mirror system 80 is not limited to a mobile body, and may be used, for example, in an amusement facility, medical facility, or the like.

(Embodiment 2)
As shown in FIG. 13, the display system 10g according to the present embodiment is different from that of the first embodiment in that the display system 10g includes the mirror 7 arranged on the optical path OP between the display surface 21 and the display mirror 3. The display system 10 is different. Hereinafter, the same components as those in the first embodiment will be designated by the common reference numerals and the description thereof will be appropriately omitted.

  The mirror 7 is configured to reflect the image P1 from the display surface 21 side to the display mirror 3 side. The mirror 7 and the display mirror 3 are arranged in the order of the mirror 7 and the display mirror 3 on the optical path OP (the optical path of the light output from the display surface 21) between the display surface 21 and the display mirror 3. ing.

  That is, the mirror 7 is arranged on the side opposite to the light source device 23 as viewed from the liquid crystal panel 22, that is, in front of the liquid crystal panel 22, so that the output light from the display surface 21 enters. The mirror 7 reflects the output light from the display surface 21 side toward the display mirror 3. The display mirror 3 is arranged at a position where the output light of the display surface 21 reflected by the mirror 7 enters. The display mirror 3 reflects the output light of the display surface 21 reflected by the mirror 7 toward the eye 201 of the user 200.

  The mirror 7 is a plane mirror. The mirror 7 includes, for example, a glass base material and a reflective film formed on the surface of the base material and made of a metal film or the like. Therefore, in the mirror 7, the output light from the display surface 21 is reflected by the surface of the reflective film.

  In the display system 10g of the present embodiment, the display unit 2, the mirror 7, and the display mirror 3 are arranged at the vertex positions of the triangle formed in the vertical plane. The “vertical plane” here is a plane including the vertical direction (vertical direction) of the image displayed by the display unit 2 and the traveling direction (optical axis) of the output light. In the display system 10g, the output light from the display surface 21 is first reflected by the mirror 7 and then by the display mirror 3.

  Therefore, in the display system 10g of the present embodiment, the output light from the display surface 21 is reflected twice. In a modified example of the display system 10g, the number of mirrors 7 may be increased so that the output light from the display surface 21 is reflected three times or more. In short, the display system 10g may be configured to reflect the output light from the display surface 21 multiple times. Here, the optical path length between the display surface 21 and the eye 201 of the user 200 is related to the distance between the projection position of the virtual image 300 seen by the eye 201 of the user 200 and the eye 201 of the user 200. Therefore, in the display system 10g, the distance from the eye 201 of the user 200 to the projection position of the virtual image 300 can be increased by reflecting the output light from the display surface 21 multiple times. Further, in the display system 10g, the display unit 2, the control unit, the display mirror 3 and the mirror 7 are housed in one housing 35. In the display system 10g, for example, if the distance from the eye 201 of the user 200 to the virtual image 300 is the same as that of the display system 10 of the first embodiment, it is possible to reduce the size of the display system 10g.

  The display system 10g may have an optical component (for example, a lens) other than the mirror 7 on the optical path OP between the display surface 21 and the display mirror 3.

  The configuration of the display system 10g according to the second embodiment can be appropriately combined with the configuration of the modified example of the first embodiment.

(Summary)
As described above, the display system (10; 10g) according to the first aspect includes the display surface (21) and the display mirror (3). The image (P1) based on the captured image is displayed on the display surface (21). The display mirror (3) reflects only a partial area of the image (P1) displayed on the display surface (21) as a reflection image (P2). The display system (10; 10g) is configured such that the position of the reflection image (P2) changes as the target person (for example, the user 200) who views the display mirror (3) moves.

  According to this configuration, the display mirror (3) is different from the mirror that reflects the entire area of the image displayed on the liquid crystal display, and a part of the image (P1) displayed on the display surface (21). Only the area of is reflected as a reflection image (P2). Here, the display system (10; 10g) is a reflection image (P1) of the image (P1) along with the movement of the viewpoint (eye 201 of the user 200) of the target person (for example, the user 200) who views the display mirror (3). The position of P2) is changed. As a result, the display system (10; 10g) has an advantage that it is possible to give a stereoscopic effect to the person (target person) who views the image to be displayed.

  In the display system (10; 10g) according to the second aspect, in the first aspect, if the viewpoint of the target person (for example, the user 200) is within the range of the eye box (203), the reflection image (P2) is It fits within the image (P1).

  According to this configuration, the image does not appear missing.

  In the display system (10; 10g) according to the third aspect, in the first or second aspect, the display mirror (3) is a concave mirror.

  According to this configuration, a person who looks at the display mirror (3) of the display system (10; 10g) has a more stereoscopic reflection image (P2) than when the display mirror (3) is a plane mirror. It becomes easier to see.

  The display system (10; 10g) which concerns on a 4th aspect is an optical path (OP) between a display surface (21) and a display mirror (3) in any one of the 1st thru|or 3rd aspect. It further comprises a mirror (7) arranged to reflect the image (P1) from the display surface (21) side to the display mirror (3) side.

  With this configuration, the optical path length between the display surface (21) and the viewpoint of the target person (for example, the user 200) can be increased.

  In the display system (10; 10g) according to the fifth aspect, in any one of the first to fourth aspects, the reflection image (P2) has a vertical direction or a horizontal direction of the image (P1). Also, the number of pixels is smaller than that of the image (P1).

  With this configuration, it is possible to prevent the image from being lost even when the position of the reflection image (P2) is changed in either the vertical direction or the horizontal direction of the image (P1).

  The display system (10; 10g) according to the sixth aspect is for adjusting the position of the reflection image (P2) in the image (P1) on the display surface (21) in any one of the first to fifth aspects. It is configured to switch whether or not to display the guide pattern (P3).

  According to this configuration, for example, when the target person (for example, the user 200) who looks at the display mirror (3) adjusts the position of the display mirror (3), the guide pattern (P3) is displayed, so that the reflection image is displayed. It is possible to prevent (P2) from becoming an image corresponding to a region in the image (P1) that is too biased from the central region.

  An electronic mirror system (80) according to a seventh aspect outputs the captured image to the display system (10; 10g) according to any one of the first to sixth aspects and the display system (10; 10g). A camera (90).

  According to this configuration, there is an advantage that it is possible to give a stereoscopic effect to the person who views the displayed image (target person).

  The moving body (for example, the automobile 100) according to the eighth aspect includes an electronic mirror system (80) of the seventh aspect and a moving body main body (for example, the main body 110 of the automobile 100) on which the electronic mirror system (80) is mounted. ), and.

  According to this configuration, there is an advantage that it is possible to give a stereoscopic effect to the person who views the displayed image (target person).

  A display system (10; 10g) according to a ninth aspect reflects a display surface (21) on which an image (P1) based on a captured image is displayed and an image (P1) displayed on the display surface (21). And a display mirror (3). The resolution of the display surface (21) is higher than the limit resolution of the image displayed at a predetermined display position by the display mirror (3). Note that the ninth aspect is an aspect that can be implemented by itself, and it is not essential to assume any one of the first to sixth aspects.

21 display surface 3 display mirror 7 mirror 10, 10g display system 80 electronic mirror system 90 camera 100 automobile (moving body)
110 main body (moving body main body)
200 users (target people)
201 eyes (viewpoint)
203 eye box P1 image P2 reflection image P3 guide pattern OP optical path

Claims (7)

A display surface on which an image based on a captured image from an imaging device mounted on the vehicle is displayed;
A concave mirror that reflects only a partial region of the image displayed on the display surface as a reflection image,
The size of the concave mirror is determined such that the size of the virtual image corresponding to the entire display surface is larger than the size of the virtual image corresponding to the visual field of the subject who views the concave mirror .
Vehicle display system. If the subject's viewpoint is within the range of the eye box, the reflection image fits within the image,
The vehicle display system according to claim 1.   Further comprising a mirror arranged on the optical path between the display surface and the concave mirror to reflect the image from the display surface side to the concave mirror side.
  The vehicle display system according to claim 1.   The reflection image has a smaller number of pixels than the image in any of the vertical and horizontal directions of the image,
  The vehicle display system according to any one of claims 1 to 3.   It is configured to switch whether to display a guide pattern for adjusting the position of the reflection image in the image on the display surface,
  The vehicle display system according to any one of claims 1 to 4.   A vehicle display system according to any one of claims 1 to 5,
  An image pickup device for outputting the picked-up image to the display system,
  Electronic mirror system.   An electronic mirror system according to claim 6,
  A vehicle equipped with the electronic mirror system,
  Moving body.

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