Display device, vehicle, display system, mobile body, and image display unit accommodation device

Abstract

A display device according to the present disclosure comprises: an image display unit that displays an image; and an optical system that forms a formed image of said image, wherein the display position of the formed image is movable.

Description

Display device, vehicle, display system, moving body, and image display unit housing device

[0001] The present invention relates to a display device for showing an image of an image to a user, a vehicle, a display system, and a moving body including the same. The present invention also relates to an image display unit housing device.

[0002] A virtual image display device that forms a virtual image of an image and shows the virtual image to a user is known (for example, Patent Document 1).

[0003] Japanese Patent No. 7528348

[0004] The display device of the present disclosure includes an image display unit that displays an image and an optical system that forms an imaging image of the image, and the display position of the imaging image is movable. The vehicle, display system, and moving body of the present disclosure include the above display device. The image display unit housing device of the present disclosure is a device on which the display unit can be installed.

[0005] The above and other objects, features, and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

[0006] This is a block diagram illustrating the configuration of a display device in the first embodiment. This is a diagram illustrating a display device mounted on a vehicle. This is a schematic diagram illustrating the image display unit and optical system in the first embodiment used in a display device. This is a schematic diagram illustrating the image display unit and optical system in the second embodiment used in a display device. This is a schematic diagram illustrating the image display unit and optical system in the third embodiment used in a display device. This is a diagram illustrating the setting of a second display position (first display position) using an input position detection unit in a display device. This is a diagram illustrating the direction of movement of the image formed when the position of the viewer's eyes is shifted left or right from the direct facing position in the display device of the first embodiment. This is a diagram illustrating the direction of movement of the image formed when the position of the viewer's eyes is shifted up or down from the direct facing position in the display device of the first embodiment. This is a block diagram illustrating the configuration of a display device in the second embodiment. This is a diagram illustrating the direction of movement of the optical system when the position of the viewer's eyes is shifted upward in the vertical direction from the direct facing position in the display device of the second embodiment. This is a diagram illustrating the direction of movement of the optical system when the position of the viewer's eyes is shifted downward in the vertical direction from the direct facing position in the display device of the second embodiment. This is a block diagram showing the configuration of the display device in the third embodiment. This is a diagram illustrating the image formed by the display device in the third embodiment. This is a block diagram showing the configuration of the display device in the fourth embodiment. This is a diagram illustrating distortion correction in the first modified form of the display device. This is a diagram illustrating the detachable part in the second modified form of the display device. This is a diagram illustrating the fourth modified form of the display device.

[0007] Hereinafter, one or more embodiments of the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the disclosed embodiments. In each figure, components denoted by the same reference numerals are identified as identical components, and their descriptions are omitted where appropriate. In this specification, general reference numerals are used without subscripts, while individual components are indicated by subscripts.

[0008] Conventionally, there has been a demand for improved image visibility even when the user views the display device from an oblique angle. Therefore, the display device in this embodiment comprises an image display unit and an optical system. The image display unit displays an image. The optical system forms an image of the image. In this display device, the display position of the image is movable. The user (viewer) is the person who views the image displayed (formed) by the display device. The user may view the display device from an oblique angle. Display devices are usually configured on the premise that the user is facing the display device directly in front of it, so when the user views the display device from an oblique angle, the image (image) may be difficult to see. In this embodiment, when the user views the display device from an oblique angle, the visibility of the image can be improved by moving the display position of the image, thereby satisfying the above demand. Hereinafter, such a display device will be described in more detail with respect to several embodiments.

[0009] (First Embodiment) Figure 1 is a block diagram showing the configuration of the display device in the first embodiment. Figure 2 is a diagram illustrating the display device mounted on a vehicle. The upper part of Figure 2 is an overall schematic diagram of the vehicle, and the lower part of Figure 2 is a schematic diagram of the front part of the vehicle interior. Figure 3 is a schematic diagram illustrating the image display unit and optical system in the first embodiment used in the display device. Figure 4 is a schematic diagram illustrating the image display unit and optical system in the second embodiment used in the display device. Figure 5 is a schematic diagram illustrating the image display unit and optical system in the third embodiment used in the display device. In Figures 3 to 5, each upper part is a cross-sectional view. Each lower part is a diagram illustrating the optical path and polarization state of the optical system. Figure 6 is a diagram illustrating the setting of the second display position (first display position) using the input position detection unit in the display device. The upper part of Figure 6 is a diagram showing the input. The lower part of Figure 6 is a diagram illustrating the difference between the input position detected by the input position detection unit and the center position of the input position detection unit. Figure 7 is a diagram illustrating the direction of image movement in the display device when the viewer's eye position is shifted left or right from the direct facing position. The upper part of Figure 7 shows the case when the viewer's eye position is shifted to the right from the direct facing position. The lower part of Figure 7 shows the case when the viewer's eye position is shifted to the left from the direct facing position. Figure 8 is a diagram illustrating the direction of image movement in the display device when the viewer's eye position is shifted up or down from the direct facing position. Figure 8 shows the case when the viewer's eye position is shifted down from the direct facing position.

[0010] A display device in one embodiment of this disclosure may be a non-wearable device for the viewer. That is, the display device may not be worn by the viewer but may be fixed to the environment. For example, the display device may be fixed to a wall, column or ceiling, etc. Alternatively, the display device may be fixed to the interior of a vehicle. This disclosure may also be worn by the viewer. If worn by the viewer, the display device may be provided with a mounting part (not shown) so that the viewing window is fixed at the position of the viewer's eyes.

[0011] The display device 1000a in the first embodiment includes, for example, an image display unit 11 and an optical system 12, as shown in Figure 1. In the example shown in Figure 1, the display device 1000a further includes an input unit 61, a control processing unit 62, a storage unit 63, a detection unit 64, an input position detection unit 65, and a search unit 66.

[0012] The display device 1000a may be used independently or incorporated into any other device. Here, as an example, the display device 1000a may be mounted on a mobile device, as shown in Figure 2. The mobile device may be a vehicle VC, an aircraft, or a ship. The vehicle VC is not limited to a passenger car, but may be a truck, bus, trolleybus or other large vehicle, or a motorcycle. The vehicle VC may generally consist of wheels, a power source for driving the wheels, and a cabin (passenger compartment) where the occupants are seated. When mounted on a vehicle VC, the display device 1000a may be mounted on the vehicle VC as a cluster 41 on the vehicle VC's dashboard (instrument panel), for example. Alternatively, the display device 1000a may be mounted on the vehicle VC as a HUD (Head Up Display) 42. Alternatively, for example, the display device 1000a may be mounted on the vehicle VC as the CID (Center Information Display) 43 of the vehicle VC. Alternatively, for example, the display device 1000a may be mounted on the vehicle VC as the PID (Passenger Information Display) 44 of the vehicle VC. Alternatively, for example, the display device 1000a may be mounted on the vehicle as the rearview mirror 45 of the vehicle VC. As an example of this disclosure, a display system may be configured comprising the display device 1000a and a camera CAB that captures the scenery around a moving object. Here, the scenery around the moving object may be at least one of the front, rear, side, above, and below the moving object. The display device 1000a may be able to communicate with the camera CAB and may display images captured by the camera CAB on the image display unit. The vehicle VC is equipped with a camera CAB that captures images of the area behind the vehicle VC, and the display device 1000a, which functions as a rearview mirror 45, displays the image captured by the camera CAB. Alternatively, for example, the display device 1000a may be mounted on the vehicle VC as digital side mirrors 46R and 46L. The digital side mirror 46R is positioned on the right A-pillar of the vehicle VC, and the digital side mirror 46L is positioned on the left A-pillar of the vehicle VC.The vehicle VC is equipped with a camera CAR that captures the right rear of the vehicle VC, and the display device 1000a, which functions as a digital side mirror 46R, displays the image captured by the camera CAR. The vehicle VC is also equipped with a camera CAL that captures the left rear of the vehicle VC, and the display device 1000a, which functions as a digital side mirror 46L, displays the image captured by the camera CAL. Alternatively, for example, the display device 1000a may be mounted on the vehicle VC as a Rear Seat Entertainment (RSE) 47 of the vehicle VC. The upper part of Figure 5 shows an RSE 47 located at the rear of the headrest area of ​​the driver's seat FS, but the display device 1000a as an RSE 47 may be located at the rear of the headrest area of ​​the passenger seat. Alternatively, for example, the display device 1000a may be mounted on the vehicle VC as a door mirror (not shown) of the vehicle VC.

[0013] When the display device 1000a is used as one of the clusters 41, HUD 42, CID 42, and PID 43, a viewing window (not shown) is formed and provided on the dashboard. The viewing window is a window (opening) for viewing the image (image) displayed (formed) by the display device 1000a. In the case of the HUD 42, the windshield (front glass) WS of the vehicle VC is used as a so-called combiner for the HUD 42. Alternatively, for example, a semi-transparent mirror 51 that reflects image light is provided on the windshield WS near the dashboard, and the semi-transparent mirror 51 functions as a combiner for the HUD 42. The image light that becomes the image emitted from the viewing window enters the combiner and is viewed by the viewer CR. In the case of the HUD 42, the combiner is included in the optical system 12.

[0014] When the display device 1000a is used as one of the rearview mirror 45, digital side mirrors 46R, 46L, RSE 47, or door mirrors, the display device 1000a further comprises a hollow housing (not shown). The housing may house at least an image display unit 11 and an optical system 12. The housing is provided with a viewing window (not shown) for viewing the image (image formed) displayed (formed) by the image display unit 11 and the optical system 12.

[0015] A window member may be fitted and fixed into the viewing window. The window member is made of a material that transmits visible light. Such materials include, for example, polycarbonate resin and acrylic resin. In this case, the image display unit 11, the optical system 12, and the window member (viewing window) are arranged in the order of image display unit 11, optical system 12, and window member (viewing window) such that the central positions of the image display unit 11, the optical system 12, and the window member (viewing window) lie on a straight line. In the first embodiment, the straight line is the normal to the display surface 111 of the image display unit 11. Note that the window member is not required. In other words, the viewing window may or may not have a window member. The viewing window may function as a viewing unit.

[0016] The image display unit 11 is connected to the control processing unit 62 and displays an image according to the control of the control processing unit 62. More specifically, the image display unit 11 is a device that has a display surface 111, as shown in Figure 3, and displays an image of visible light on this display surface 111. The image may be a still image or a moving image. The image display unit 11 displays an image of first linear polarization. For example, a polarizing plate may be placed in front of the display surface 111. The first linear polarization may be S polarization or P polarization orthogonal to S polarization. In this embodiment, the first linear polarization is S polarization as an example, and the second linear polarization is P polarization as an example, but is not limited to this. For example, S-wave polarization in the following description may be read as P-wave polarization, and P-wave polarization may be read as S-wave polarization. The image display unit 11 may be, for example, a liquid crystal display device (LCD). Alternatively, for example, the image display unit 11 may be an organic photoluminescence display device.

[0017] The image display unit 11 may include an illuminator that illuminates the display surface 111 in a planar manner. The illuminator is also called a backlight. The illuminator may be an edge-lit backlight or a direct-lit backlight. The light source of the illuminator may be a cold cathode fluorescent lamp, a halogen lamp, or a xenon lamp, or it may be a light-emitting diode (LED), an organic light-emitting diode (OLED), a semiconductor laser (LD), etc. The image display unit 11 is not limited to a liquid crystal display device (LCD) including a liquid crystal panel (transmissive display panel). The image display unit 11 may be a self-emissive image display unit 11 including, for example, a light-emitting diode (LED), an organic light-emitting diode (OLED), a semiconductor laser (LD), etc.

[0018] In the first embodiment, the image display unit 11 includes an image display area that is larger than the size of the image to be displayed. For example, if the size of the image to be displayed is a × b, the size of the image display area will be A × B if a < A and b < B. The values ​​of A and B are set appropriately based on the values ​​of a and b, according to the second movement amount described later.

[0019] The optical system 12 forms an image (image-formed image) of the image displayed on the image display unit 11. The image can be a real image or a virtual image. In the example shown in Figure 3, the optical system 12 comprises a first phase difference plate 13, a semi-transparent mirror 14, a second phase difference plate 15, and a reflective polarizer 16. These optical elements 13 to 16 are arranged sequentially in this order with respect to the display surface 111 of the image display unit 11, moving away from the display surface 111.

[0020] The first phase difference plate 13 is an optical element that emits light with a phase difference between mutually orthogonal polarization components in incident visible light. The first phase difference plate 13 is positioned opposite the display surface 111 of the image display unit 11. In this embodiment, the first phase difference plate 13 is a quarter-wave plate that provides a 90° phase difference, emits linearly polarized incident light as circularly polarized light, and emits circularly polarized light as linearly polarized light.

[0021] Here, "facing" in this context means that they are opposite each other. When A faces B, other members may or may not be interposed between member A and member B. In other words, when member A faces member B, in this context, member A is interpreted as being located on one side of member B.

[0022] The semi-transparent mirror 14 is an optical element that reflects a portion of the incident visible light and transmits the remainder. The transmittance of the semi-transparent mirror 14 may be about 50%, and the reflectance of the semi-transparent mirror 14 may be about 50%, but is not limited to these values. The semi-transparent mirror 14 is positioned opposite the first phase difference plate 13 and is spaced at a predetermined distance (11th interval) from the first phase difference plate 13. The semi-transparent mirror 14 may have a function to collect or focus light. Specifically, the semi-transparent mirror 14 may have a function to collect or focus light that has been incident on and reflected by the semi-transparent mirror 14. The semi-transparent mirror 14 may have a concave surface facing the second phase difference plate 15. That is, the semi-transparent mirror 14 may have a convex surface facing the first phase difference plate 13.

[0023] The second phase difference plate 15, like the first phase difference plate 13, is an optical element that emits light with a phase difference between mutually orthogonal polarization components in incident visible light. The second phase difference plate 15 is positioned opposite the semi-transparent mirror 14 and is spaced at a predetermined distance (12th interval) from the semi-transparent mirror 14. In this embodiment, the second phase difference plate 15, like the first phase difference plate 13, is a quarter-wave plate and provides a phase difference of 90°.

[0024] The reflective polarizer 16 is an optical element that reflects a predetermined polarization of incident visible light and transmits a predetermined other polarization. On the surface of the reflective polarizer 16 facing the second phase difference plate 15, it reflects a first linearly polarized light (S-polarized light in the above example) and transmits a second linearly polarized light (P-polarized light in the above example) that is orthogonal to the first linearly polarized light. The reflective polarizer 16 faces the second phase difference plate 15 and is arranged at a predetermined distance (13th interval) from the second phase difference plate 15. The reflective polarizer 16 comprises, for example, a plate-shaped substrate that transmits visible light and a plurality of parallel metal fine wires formed on the substrate. The plurality of metal fine wires are referred to as a so-called wire grid. The substrate is made of, for example, glass, acrylic resin, and polycarbonate resin. The plurality of metal fine wires are made of, for example, aluminum (Al), chromium (Cr), and titanium oxide (TiO). ２ It is formed from a metal (including alloys) such as ). Such a reflective polarizing plate 16 reflects polarization components parallel to the wire grid (the extension direction of the thin metal wires) and transmits polarization components perpendicular to the wire grid.

[0025] The image display unit 11 is positioned between the focal point of the optical system 12 and the position of the first phase difference plate 13 when the optical system 12 forms a virtual image. The virtual image is formed and visible to the viewer's eye. When the optical system 12 forms a real image, the image display unit 11 is positioned further away from the first phase difference plate 13 than the focal point of the optical system 12. The real image may be projected onto a predetermined screen and visible to the viewer, or it may be formed as a floating image in the air and visible to the viewer.

[0026] In this configuration, as shown in the lower part of Figure 3, the light of the image displayed on the image display unit 11 (image light) is incident on the first phase difference plate 13 of the quarter-wave plate as first linearly polarized light (S-polarized light in the above example), and is emitted from the first phase difference plate 13 as circularly polarized light (for example, circularly polarized light that is clockwise in the direction of propagation). The circularly polarized image light emitted from the first phase difference plate 13 is incident on the semi-transparent mirror 14, where a portion is reflected and the remainder is transmitted. The circularly polarized image light that has passed through the semi-transparent mirror 14 is incident on the second phase difference plate 15 of the quarter-wave plate, and is emitted from the second phase difference plate 15 as first linearly polarized light (S-polarized light) from circularly polarized light. The first linearly polarized (S-polarized) image light emitted from the second phase difference plate 15 is incident on the reflective polarizer 16, reflected by the reflective polarizer 16, and its propagation direction is folded back. The first linearly polarized (S-polarized) image light reflected by the reflective polarizer 16 is incident on the second phase difference plate 15 of the quarter-wave plate, where it is converted from the first linearly polarized (S-polarized) light to circularly polarized light (for example, circularly polarized light rotated clockwise in the direction of propagation) and emitted. The circularly polarized image light emitted from the second phase difference plate 15 is incident on the semi-transparent mirror 14, where a portion is reflected and the propagation direction is folded back again, and the remainder is transmitted. The circularly polarized (for example, circularly polarized light rotated counterclockwise in the direction of propagation) image light reflected by the semi-transparent mirror 14 is incident on the second phase difference plate 15 of the quarter-wave plate, where it is converted from circularly polarized light to second linearly polarized (P-polarized) light and emitted. The second linearly polarized (P-polarized) image light emitted from the second phase difference plate 15 is incident on the reflective polarizer 16 and transmitted through the reflective polarizer 16. In this display unit 10, the image light emitted from the optical system 12 is 25% of the light intensity of the image light displayed on the image display unit 11.

[0027] Although the display device 1000a includes the image display unit 11 and optical system 12 described above (the image display unit 11 and optical system 12 in the first embodiment), the image display unit 11 and optical system 12 in the first embodiment may be replaced with the image display unit 21 and optical system 22 in the second embodiment, or with the image display unit 31 and optical system 32 in the third embodiment. Furthermore, the display device 1000a is not limited to these and may include optical systems with other configurations.

[0028] In this second embodiment, the image display unit 21 is the same as the image display unit 11 in the first embodiment, so its description will be omitted.

[0029] The optical system 22 forms the image (imaged image) of the image displayed on the image display unit 21. As shown in Figure 4, for example, the optical system 22 includes a first reflective polarizer 23, a first phase difference plate 24, a semi-transparent mirror 25, a second phase difference plate 26, and a second reflective polarizer 27. These optical elements 23 to 27 are arranged sequentially in this order with respect to the display surface 211 of the image display unit 21, moving away from the display surface 211.

[0030] The first reflective polarizer 23 is an optical element that, like the reflective polarizer 16 of the first embodiment, reflects a predetermined polarization of incident visible light and transmits a predetermined other polarization. The first reflective polarizer 23 is positioned to face the display surface 211 of the image display unit 21. The first reflective polarizer 23 may have a function to collect or focus light. Specifically, the first reflective polarizer 23 may have a function to collect or focus light that is incident on and reflected by the first reflective polarizer 23. The first reflective polarizer 23 has a concave surface (first concave surface) facing the first phase difference plate 24, and the first concave surface may transmit a first linearly polarized light (S-polarized light in the above example) and reflect a second linearly polarized light (P-polarized light) that is orthogonal to the first linearly polarized light. The first reflective polarizing plate 23 comprises, for example, a plate-shaped substrate that transmits visible light and has the concave surface formed thereon, and a plurality of fine metal wires formed on the substrate and parallel to each other on the concave surface.

[0031] The first phase difference plate 24, like the first phase difference plate 13 in the first embodiment, is an optical element that emits light with a phase difference between mutually orthogonal polarization components in incident visible light. The first phase difference plate 24 is positioned opposite the first reflective polarizer 23 and is spaced at a predetermined distance (21st interval) from the first reflective polarizer 23. In this embodiment, the first phase difference plate 24 is a quarter-wave plate and provides a phase difference of 90°.

[0032] The semi-transparent mirror 25, like the semi-transparent mirror 14 in the first embodiment, is an optical element that reflects a portion of the incident visible light and transmits the remainder. The transmittance of the semi-transparent mirror 25 may be about 50%, and the reflectance of the semi-transparent mirror 14 may be about 50%, but is not limited to this. The semi-transparent mirror 25 is positioned opposite the first phase difference plate 24 and is spaced at a predetermined distance (22nd interval) from the first phase difference plate 24.

[0033] The second phase difference plate 26, like the first phase difference plate 13 in the first embodiment, is an optical element that emits light with a phase difference between mutually orthogonal polarization components in incident visible light. The second phase difference plate 26 is positioned opposite the semi-transparent mirror 25 and is spaced at a predetermined distance (23rd interval) from the semi-transparent mirror 25. In this embodiment, the second phase difference plate 26, like the first phase difference plate 24, is a quarter-wave plate and provides a 90° phase difference.

[0034] The second reflective polarizer 27, like the reflective polarizer 16 of the first embodiment, is an optical element that reflects a predetermined polarization of incident visible light and transmits a predetermined other polarization. The second reflective polarizer 27 is positioned opposite the second phase difference plate 26 and is spaced at a predetermined interval (24th interval) from the second phase difference plate 26. On the surface facing the second phase difference plate 26, the second reflective polarizer 27 reflects a first linearly polarized light (S-polarized light in the above example) and transmits a second linearly polarized light (P-polarized light) that is orthogonal to the first linearly polarized light. The second reflective polarizer 27 comprises, for example, a plate-shaped substrate that transmits visible light and a plurality of parallel metal wires formed on the substrate. An absorptive polarizer may be used instead of the second reflective polarizer 27. An absorptive polarizer is an optical element that absorbs a predetermined polarization of incident visible light and transmits a predetermined other polarization. Absorption polarizers may be, for example, iodine-based polarizers in which an iodine compound is adsorbed and oriented on a polyvinyl alcohol (PVA) film, or dye-based polarizers in which a dichroic organic dye is adsorbed and oriented on a PVA film.

[0035] The image display unit 21 is positioned between the focal point of the optical system 22 and the position of the first reflective polarizer 23 when the optical system 22 forms a virtual image. The virtual image is formed and visible to the viewer's eye. When the optical system 22 forms a real image, the image display unit 21 is positioned further away from the first reflective polarizer 23 than from the focal point of the optical system 22. The real image may be projected onto a predetermined screen and visible to the viewer, or it may be formed as a floating image in the air and visible to the viewer.

[0036] In this configuration, as shown in the lower part of Figure 4, the light of the image displayed on the image display unit 21 (image light) is incident on the first reflective polarizer 23 as first linearly polarized light (S-polarized light in the above example) and passes through the first reflective polarizer 23. The first linearly polarized (S-polarized) image light emitted from the first reflective polarizer 23 is incident on the first phase difference plate 24 of the quarter-wave plate, where it is converted from first linearly polarized light to circularly polarized light (for example, circularly polarized light that is clockwise in the direction of propagation) and emitted. The circularly polarized image light emitted from the first phase difference plate 24 is incident on the semi-transparent mirror 25, where a portion is reflected and the propagation direction is folded back, and the remainder is transmitted. The circularly polarized image light that has passed through the semi-transparent mirror 24 is incident on the second phase difference plate 26 of the quarter-wave plate, where it is converted from circularly polarized light to first linearly polarized light (S-polarized light) and emitted. The first linearly polarized (S-polarized) image light emitted from the second phase difference plate 26 is incident on the second reflective polarizer plate 27 and reflected by the second reflective polarizer plate 27. On the other hand, the circularly polarized (for example, counterclockwise circularly polarized in the direction of propagation) image light reflected by the semi-transparent mirror 25 is incident on the first phase difference plate 24 of the quarter-wave plate, and is emitted from the first phase difference plate 24 as second linearly polarized (P-polarized) light. The second linearly polarized (P-polarized) image light emitted from this first phase difference plate 24 is incident on the first reflective polarizer plate 23, is reflected by the first reflective polarizer plate 23, and the propagation direction is folded back again. The second linearly polarized (P-polarized) image light reflected by the first reflective polarizer 24 is incident on the first phase difference plate 24 of the quarter-wave plate, where it is converted from second linearly polarized (P-polarized) to circularly polarized (for example, counterclockwise circularly polarized) light in the direction of propagation and emitted. The circularly polarized image light emitted from the first phase difference plate 24 is incident on the semi-transparent mirror 25, where a portion is reflected and the remainder is transmitted. The circularly polarized image light that has passed through the semi-transparent mirror 25 is incident on the second phase difference plate 26 of the quarter-wave plate, where it is converted from circularly polarized to second linearly polarized (P-polarized) light and emitted. The second linearly polarized (P-polarized) image light emitted from the second phase difference plate 26 is incident on the second reflective polarizer 27 and transmitted through the second reflective polarizer 27. In this display unit 20, the image light emitted from the optical system 22 is 25% of the light intensity of the image light displayed on the image display unit 21.

[0037] In the third embodiment described above, the image display unit 31 is the same as the image display unit 11 in the first embodiment, so its description will be omitted.

[0038] The optical system 32 forms the image (imaged image) of the image displayed on the image display unit 31. The optical system 22, as shown in Figure 5 for example, includes a first reflective polarizer 33, a first phase difference plate 34, a semi-transparent mirror 35, a second phase difference plate 36, and a second reflective polarizer 37. These optical elements 33 to 37 are arranged sequentially in this order with respect to the display surface 311 of the image display unit 31, in a direction away from the display surface 311. The first reflective polarizer 33, the first phase difference plate 34, the semi-transparent mirror 35, and the second phase difference plate 36 are the same as the first reflective polarizer 23, the first phase difference plate 24, the semi-transparent mirror 25, and the second phase difference plate 26 in the display unit 20 of the second embodiment, so their explanation is omitted.

[0039] The second reflective polarizer 37 is an optical element that, like the reflective polarizer 16 of the first embodiment, reflects a predetermined polarization of incident visible light and transmits a predetermined other polarization. The second reflective polarizer 37 is positioned opposite the second phase difference plate 36. The second reflective polarizer 37 has a concave surface (second concave surface) opposite the second phase difference plate 36, and at the second concave surface, it reflects first linearly polarized light (S-polarized light in the above example) and transmits second linearly polarized light (P-polarized light) that is orthogonal to the first linearly polarized light. The second reflective polarizer 37 comprises, for example, a plate-shaped substrate that transmits visible light and forms the second concave surface, and a plurality of fine metal wires formed on the substrate and parallel to each other at the second concave surface.

[0040] The image display unit 31 is positioned between the focal point of the optical system 32 and the position of the first reflective polarizer 33 when the optical system 32 forms a virtual image. The virtual image is formed and visible to the viewer. When the optical system 32 forms a real image, the image display unit 31 is positioned further away from the first reflective polarizer 33 than from the focal point of the optical system 32. The real image may be projected onto a predetermined screen and visible to the viewer, or it may be formed as a floating image in the air and visible to the viewer.

[0041] In this configuration, as shown in the lower part of Figure 5, the light of the image displayed on the image display unit 31 (image light) is emitted from the second reflective polarizer 37 in the first and second optical paths, because the second reflective polarizer 37 has a second concave surface facing the second phase difference plate 36.

[0042] In the first optical path, as shown in the upper part of the lower section of Figure 5, the first linearly polarized light (S-polarized light in the above example) is incident on the first reflective polarizer 33 and passes through the first reflective polarizer 33. The first linearly polarized (S-polarized) image light emitted from the first reflective polarizer 33 is incident on the first phase difference plate 34 of the quarter-wave plate, where it is converted from first linearly polarized light to circularly polarized light (for example, circularly polarized light that rotates clockwise in the direction of propagation) and emitted. The circularly polarized image light emitted from the first phase difference plate 34 is incident on the semi-transparent mirror 35, where a portion is reflected and the propagation direction is folded back, and the remainder is transmitted. The circularly polarized image light that has passed through the semi-transparent mirror 35 is emitted from the second reflective polarizer 37 in the second optical path, as will be described later. On the other hand, the circularly polarized image light (for example, circularly polarized light rotating counterclockwise in the direction of propagation) reflected by the semi-transparent mirror 35 is incident on the first phase difference plate 34 of the quarter-wave plate, where it is converted from circularly polarized light to second linearly polarized light (P-polarized light) and emitted. This second linearly polarized (P-polarized) image light emitted from the first phase difference plate 34 is incident on the first reflective polarizer 33, where it is reflected and its propagation direction is folded back again. This second linearly polarized (P-polarized) image light reflected from the first reflective polarizer 33 is incident on the first phase difference plate 34 of the quarter-wave plate, where it is converted from second linearly polarized light (P-polarized light) to circularly polarized light (for example, circularly polarized light rotating counterclockwise in the direction of propagation) and emitted. This circularly polarized image light emitted from the first phase difference plate 34 is incident on the semi-transparent mirror 35, where a portion is reflected and the remainder is transmitted. The circularly polarized image light that passes through the semi-transparent mirror 35 is incident on the second phase difference plate 36 of the quarter-wave plate, where it is converted from circularly polarized light to second linearly polarized light (P-polarized light) and emitted. This second linearly polarized (P-polarized) image light emitted from the second phase difference plate 36 is incident on the second reflective polarizer 37 and passes through the second reflective polarizer 37.

[0043] In the second optical path, as shown in the lower part of FIG. 5 on the lower side, the circularly polarized image light transmitted through the semi-transmissive mirror 35 is incident on the second retardation plate 36 of the quarter-wave plate, and becomes the first linearly polarized light (S-polarized light) from the circularly polarized light and is emitted by the second retardation plate 36. The image light of the first linearly polarized light (S-polarized light) emitted from the second retardation plate 36 is incident on the second reflective polarizing plate 37, is reflected by the second reflective polarizing plate 37, and the propagation direction is folded back. The image light of the first linearly polarized light (S-polarized light) reflected by the second reflective polarizing plate 37 is incident on the second retardation plate 36 of the quarter-wave plate, and becomes circularly polarized light (for example, clockwise circularly polarized light in the propagation direction) from the first linearly polarized light (S-polarized light) and is emitted by the second retardation plate 36. The circularly polarized image light emitted from the second retardation plate 36 is incident on the semi-transmissive mirror 35, a part is reflected by the semi-transmissive mirror 35 and the propagation direction is folded back again, and the remaining part is transmitted. The image light of the circularly polarized light (for example, counterclockwise circularly polarized light in the propagation direction) reflected by the semi-transmissive mirror 35 is incident on the second retardation plate 36 of the quarter-wave plate, and becomes the second linearly polarized light (P-polarized light) from the circularly polarized light and is emitted by the second retardation plate 36. The image light of the second linearly polarized light (P-polarized light) emitted from the second retardation plate 36 is incident on the second reflective polarizing plate 37 and passes through the second reflective polarizing plate 37.

[0044] In this display unit 30, with respect to the light amount of the image light displayed on the image display unit 31, in the first optical path, the image light is emitted from the optical system 32 with a light amount of 25 [%], and in the second optical path, the image light is emitted from the optical system ३२ with a light amount of 25 [%]. Therefore, with respect to the light amount of the image light displayed on the image display unit 31, the image light is emitted from the optical system 32 with a light amount of 50 (= 25 + 25) [%].

[0045] Since the optical systems 12, 22, and 32 of the first to third aspects as described above fold back the optical path, when forming an image of the same size, the thickness can be made thinner compared to the case where the optical path is not folded back. <>

[0046] The optical systems 12, 22, and 32 can form a virtual image so that it can be visually recognized through the viewing window. In other words, the virtual image can be visually recognized by looking through the viewing window. Further in other words, it can be said that the virtual image cannot be visually recognized without passing through the viewing window.

[0047] Returning to Figure 1, the input unit (first input unit) 61 is connected to the control processing unit 62 and is a device that receives input for the display position (first display position) of the image. More specifically, the input unit 61 receives input for the first display position by receiving input for the amount of movement (first movement amount) that moves the first display position. As will be described later, the first display position of the image is determined by the display position (second display position) of the image displayed on the image display unit 11, so the first display position can be represented by the second display position, and the first movement amount can be represented by the amount of movement that moves the second display position (second movement amount). In other words, the input unit 61 can also be said to be a device that receives input for the second movement amount. The input unit 61 outputs the received second movement amount (first movement amount) to the control processing unit 62, and the second movement amount (first movement amount) is set in the first position control unit 623, which will be described later, in the control processing unit 62. More specifically, the input unit 61 includes, for example, a first sub-input unit for inputting an increase in the second movement amount, and a second sub-input unit for inputting a decrease in the second movement amount. When the second movement amount (first movement amount) is increased, the second display position (first display position) moves, for example, in a predetermined positive direction along the direction of movement, and when the second movement amount is decreased, the second display position moves, for example, in the opposite direction to the positive direction (negative direction) along the direction of movement. The direction of movement is the direction in which the second display position (first display position) moves. The first sub-input unit may, for example, include a slide switch, where the increase in the second movement amount is input by the slide amount. Alternatively, for example, the first sub-input unit may include a rotary switch, where the increase in the second movement amount is input by the rotation amount. Similarly, the second sub-input unit may, for example, include a slide switch, where the decrease in the second movement amount is input by the slide amount. Alternatively, for example, the second sub-input unit may include a rotary switch, where the decrease in the second movement amount is input by the rotation amount. The increase may be an increase relative to the current position at the second display position (first display position), or an increase relative to a preset default second display position. The decrease may be a decrease relative to the current position at the second display position (first display position), or a decrease relative to a preset default second display position. The default second display position may be, for example, the center position of the image display area on the display surface 111 of the image display unit 11.When the image display area is rectangular, the central position of the image display area may be the intersection of the two diagonals.

[0048] The detection unit 64 is connected to the control processing unit 62 and is a device that detects the position of the eyes of the viewer CR according to the control of the control processing unit 62. The detection unit 64 outputs the detected eye position of the viewer CR to the control processing unit 62. The detection unit 64 includes, for example, an eye tracker that tracks the eye position. The eye position may be defined as, for example, the position of the right eye, or may be defined as, for example, the position of the left eye, or may be defined as, for example, the central position of both eyes (the average position (the average value of each position coordinate) of the right eye position and the left eye position), and is defined appropriately in advance. Since the angle at which the viewer CR views the display device 1000a can be estimated based on the eye position of the viewer CR, the second display position (the first display position) can be determined based on the eye position of the viewer CR. The angle at which the viewer CR views the display device 1000a is the angle formed by the normal direction on the image plane of the imaging image formed by the display device 1000a and the line of sight of the viewer CR. When the display device 1000a is mounted on a vehicle and the vehicle includes an eye tracker for detecting the drowsiness and mental state of the occupant, etc., this eye tracker may be diverted as the detection unit 64 of the display device 1000a.

[0049] The input position detection unit 65 has an operation surface and is a device that detects the input position where an input operation is performed on the operation surface. The input position detection unit 65 is connected to the control processing unit 62, detects the input position according to the control of the control processing unit 62, and outputs the detected input position to the control processing unit 62. The input position detection unit 65 includes, for example, a touch sensor such as a resistive film method and a capacitance method.

[0050] Such an input position detection unit 65 may be combined with the image formed by the image display unit 11 and the optical system 12 to constitute a so-called touch panel (touch panel display). In this case, each position on the operating surface corresponds to each position on the display surface 111 of the image display unit 11 (each position in the image). The input position detection unit 65 is formed to transmit visible light wavelengths because the image formed is viewed through the input position detection unit 65. When a touch panel display is configured, the input position detection unit 65 may be placed in the viewing window (not shown) or on the window member (not shown). For example, the display device 1000a is used as a CID 43, and the input position detection unit 65 is placed on the window member (not shown) in the CID.

[0051] The image formation display may include a first sub-input button for inputting an increase in the second movement amount (first movement amount) and a second sub-input button for inputting a decrease in the second movement amount. By inputting the position of the operating surface corresponding to the display position (third display position) of the first sub-input button, the increase in the second movement amount is input. By inputting the position of the operating surface corresponding to the display position (fourth display position) of the second sub-input button, the decrease in the second movement amount is input. When such first and second sub-input buttons are provided, the input position detection unit 67 can also accept input of the second movement amount (first movement amount), so the display device 1000a may include at least one of the input unit 61 and the input position detection unit 65.

[0052] The investigation unit 66 is connected to the control processing unit 62 and is a device that investigates at least one of the position and orientation of the seat according to the control of the control processing unit 62. The investigation unit 66 outputs at least one of the position and orientation it has investigated to the control processing unit 62. The investigation unit 66 includes, for example, a detection sensor that detects at least one of the position and orientation. Alternatively, for example, the investigation unit 66 includes a second input unit that receives input for the adjustment amount of at least one of the position and orientation. The seat position is represented by the position of the seat surface along the normal to the image plane in the image IM formed by the image display unit 11 and the optical system 12. More specifically, the display device 1000a is mounted on a vehicle, for example, the seat is a seat in the vehicle, and the seat position is represented by the position of the seat surface (front-to-back position) in the vehicle's longitudinal direction. In this case, the line segment along the normal will be projected onto the line segment along the vehicle's longitudinal direction. The seat orientation is represented by the height and inclination angle (first inclination angle) of the seat surface and the inclination angle of the seat back (second inclination angle). The second input unit includes a seat position input unit for inputting a first adjustment amount for the seat position, a seat height input unit for inputting a second adjustment amount for the seat height, a seat tilt angle input unit for inputting a third adjustment amount for the first tilt angle of the seat, and an SB tilt angle input unit for inputting a fourth adjustment amount for the second tilt angle of the seat back. As the seat position is moved forward, the position of the viewer CR's eyes moves forward. As the seat height is increased, the height of the viewer CR's eyes increases. As the rear of the seat is lowered relative to the front, the height of the viewer CR's eyes decreases. As the seat back is made vertical, the viewer's eyes move forward and become higher. Since the position of the viewer CR's eyes can be estimated from at least one of the position and posture, a second display position (first display position) can be determined based on at least one of the position and posture.

[0053] The storage unit 63 is connected to the control processing unit 62 and is a circuit that stores various predetermined programs and various predetermined data in accordance with the control of the control processing unit 62.

[0054] The various predetermined programs mentioned above include, for example, a control processing program, which includes, for example, a control program, a first image control program, a first position control program, a first processing program, a second processing program, and a third processing program. The control program is a program that controls each part 11, 61, 63-66 of the display device 1000a according to the function of each part. The first image control program is a program that controls the image to be displayed on the image display unit 11. The first position control program is a program that controls the image display unit 11 so that the second display position of the image moves within the image display area on the display surface 111 of the image display unit 11. The first processing program is a program that determines a second movement amount (first movement amount) based on the position of the eye detected by the detection unit 64 and sets it in the first position control program. The second processing program may be a program that, when an image is displayed on the image display unit 11, determines the display position of the image based on the difference between the input position detected by the input position detection unit 65 and the center position of the input position detection unit 65 and sets it in the first position control program. The third processing program is a program that determines a second displacement amount (first displacement amount) based on at least one of the position and orientation investigated by the investigation unit 66 and sets it in the first position control program.

[0055] The various predetermined data mentioned above include, for example, the second movement amount (first movement amount) received by the input unit 61, and data necessary for executing each of these programs, such as first to third conversion information. The first conversion information is information that converts the eye position detected by the detection unit 64 into the second movement amount. The second conversion information is information that converts the difference obtained by the second processing program into the second movement amount. The third conversion information is information that converts at least one of the position and orientation investigated by the investigation unit 66 into the second movement amount. Each of these first to third conversion information is appropriately created in advance from, for example, multiple samples and stored in the storage unit 63.

[0056] Such a storage unit 63 may include, for example, a non-volatile memory element such as ROM (Read Only Memory) or a rewritable non-volatile memory element such as EEPROM (Electrically Erasable Programmable Read Only Memory). Furthermore, the storage unit 63 may include RAM (Random Access Memory) or the like, which serves as the working memory of the so-called control processing unit 62 that stores data generated during the execution of the predetermined program. In addition, the storage unit 63 may be configured to include a hard disk drive or solid-state drive (SSD) with a relatively large storage capacity.

[0057] The control processing unit 62 is a circuit for controlling the first display position of the image (the second display position of the image displayed on the image display unit 11) by controlling each part 11, 61, 63-66 of the display device 1000a according to the function of each part. The control processing unit 62 is configured, for example, with a CPU (Central Processing Unit) and its peripheral circuits. When the control processing program is executed, the control processing unit 62 is functionally configured with a control unit 621, a first image control unit 622, a first position control unit 623, a first processing unit 624, a second processing unit 625, and a third processing unit 626.

[0058] The control unit 621 controls each part 10 (20, 30), 61, 63-65 of the display device 1000b according to the function of each part, and is in charge of the overall control of the display device 1000b.

[0059] The first image control unit 622 controls the image to be displayed on the image display unit 11. For example, the first image control unit 622 controls the image display unit 11 to display a still image stored in the storage unit 63. Alternatively, for example, the first image control unit 622 controls the image display unit 11 to display a video stored in the storage unit 63. Alternatively, for example, if the display device 1000a is used as a rearview mirror 45, the first image control unit 622 controls the image display unit 11 to display an image captured by the camera CAB.

[0060] The first processing unit 624 uses the first conversion information to determine a second movement amount (first movement amount) based on the eye position detected by the detection unit 65. The first processing unit 624 notifies the first position control unit 623 of this determined second movement amount and sets the second movement amount in the first position control unit 623. The second display position (first display position) is set by setting the second movement amount.

[0061] When the image is displayed on the image display unit 11, the second processing unit 625 may determine the display position of the image based on the difference between the input position detected by the input position detection unit 65 and the center position of the input position detection unit 65, and set it in the first position control unit 623.

[0062] More specifically, the second processing unit 625 displays the position setting image RIS stored in the storage unit 63 on the image display unit 11, for example, as shown in the upper part of Figure 6. The position setting image RIS is, for example, a monochrome image such as blue or green. This position setting image RIS may have a marker MK at its center to indicate the central position of the image RIS. The central position of the position setting image RIS is the intersection of two diagonals when the image RIS is rectangular. The viewer CR inputs information by, for example, touching the central position in the image of the position setting image RIS to operate the operating surface of the input position detection unit 65. If there is no marker MK, the viewer CR may touch a position that they suspect to be the central position. In this case, the first display position (second display position) may be adjusted by repeated trial and error.

[0063] When an input operation is performed, the input position detection unit 65 detects the input position IP of the operating surface that was operated on and outputs this detected input position IP to the control processing unit 62. When the input position IP is input from the input position detection unit 65, the second processing unit 625 calculates the difference ΔSD between the input position IP detected by the input position detection unit 65 and the central position CP of the input position detection unit 65, for example, as shown in the lower part of Figure 6. The second processing unit 625 uses the second conversion information to calculate the second movement amount (first movement amount) based on this calculated difference ΔSD. The difference ΔSD comprises, for example, a difference component ΔSDx in the horizontal direction (left-right direction, x direction) and a difference component ΔSDy in the vertical direction (up-down direction, y direction). The second transformation information comprises information that transforms the difference component ΔSDx in the x direction into the second movement amount in the x direction of the second movement amount (second x transformation information), and information that transforms the difference component ΔSDy in the y direction into the second movement amount in the y direction of the second movement amount (second y transformation information). The second movement amount may be represented by the second movement amount in the x direction and the second movement amount in the y direction. The second processing unit 625 then notifies the first position control unit 623 of the obtained second movement amount, thereby setting the second movement amount in the first position control unit 623. The second display position (first display position) is set by setting the second movement amount.

[0064] Furthermore, the first and third processing units 624 and 626 may also express the second movement amount as a second movement amount in the x direction and a second movement amount in the y direction.

[0065] In one embodiment, the central position or a position presumed to be the central position in the image of the position setting image RIS is touched, and the difference △SD between the input position IP detected by the input position detection unit 65 and the central position CP of the input position detection unit 65 is calculated. However, it is not limited to the central position, but can be any predetermined position. For example, the predetermined position may be the position of an edge in the image. For example, the predetermined position may be the position of a corner in the image. For example, a marker MK in the position setting image RIS may be displayed at the left edge of the image RIS, the position of the left edge in the image of the image RIS (the position in the image corresponding to the marker MK of the image RIS) is touched, the difference △SD between the input position IP detected by the input position detection unit 65 and the position of the left edge of the input position detection unit 65 is calculated, and the second movement amount (first movement amount) can be calculated based on the difference △SD. For example, a predetermined position in the image when viewed from a predetermined direction (e.g., the front direction) is associated with a predetermined position in the input position detection unit 65. When viewed from a direction other than the predetermined direction (e.g., an oblique direction), the predetermined position in the image or a position presumed to be the predetermined position is touched, and the difference ΔSD between the input position IP detected by the input position detection unit 65 and the predetermined position in the input position detection unit 65 is calculated. Based on this difference ΔSD, a second movement amount (first movement amount) may be determined.

[0066] The third processing unit 626 uses the third conversion information to determine a second movement amount (first movement amount) based on at least one of the position and orientation investigated by the investigation unit 66. The third processing unit 626 notifies the first position control unit 623 of the determined second movement amount and sets the second movement amount in the first position control unit 623. The setting of the second movement amount sets the second display position (first display position). In one example, when the display device 1000a is installed as a CID in a right-hand drive vehicle, if the seat position is shifted forward from the default position, the third conversion information includes a second movement amount that is shifted to the left of the default second display position, and the third processing unit 626 uses this third conversion information to convert the seat position into a second movement amount that is shifted to the left of the default second display position. In another example, in the case described above, if the seat position shifts to the rearward side from the default position, the third conversion information includes a second movement amount that shifts to the right of the default second display position, and the third processing unit 626 uses this third conversion information to convert the seat position into a second movement amount that shifts to the right of the default second display position.

[0067] The first position control unit 623 controls the image display unit 11 to move the second display position of the image within the image display area on the display surface 111 of the image display unit 11. More specifically, when the input unit 61 receives input for a second movement amount and the second movement amount is set, the first position control unit 623 controls the second display position so that it becomes the second movement amount input by the input unit 61. When the second movement amount is set by the first processing unit 624, the first position control unit 623 controls the second display position so that it becomes the second movement amount determined by the first processing unit 624. When the second movement amount is set by the second processing unit 625, the first position control unit 623 controls the second display position so that it becomes the second movement amount determined by the second processing unit 625. When the second movement amount is set by the third processing unit 626, the first position control unit 623 controls the second display position so that it becomes the second movement amount determined by the third processing unit 626.

[0068] For example, if the size of the image to be displayed is a × b, and the size of the image display area on the display surface 111 of the image display unit 11 is A × B = a × 2b (the size of the image display area is twice the size of the image to be displayed only in the left-right direction (horizontal direction, x direction)), as shown in the upper part of Figure 7, if the position of the viewer CR's eyes is shifted to the right in the left-right direction from the facing position FP, the first position control unit 623 shifts the image to be displayed to the left by a second amount from the central position of the display surface 111 (the default second display position) and displays it on the image display unit 11. As a result, the first display position of the image VIL is shifted to the left by a first amount from the first display position of the image image when the image to be displayed is displayed at the central position of the display surface 111. The facing position FP is the position in the display device 1000a that faces the image display unit 11 directly (directly in front), and is any position on the normal of the image plane in the image image. Alternatively, for example, as shown in the lower part of Figure 7, if the position of the viewer's eyes (CR) is shifted to the left in the left-right direction from the facing position (FP), the first position control unit 623 shifts the image to be displayed to the right by a second amount from the center position of the display surface 111 and displays it on the image display unit 11. As a result, the first display position of the image VIR is shifted to the right by a first amount from the first display position of the image when the image to be displayed is displayed at the center position of the display surface 111. In this way, the first position control unit 623 shifts the image to be displayed by a second amount in the opposite direction to the shift direction of the viewer's CR relative to the facing position (FP) and displays it on the image display unit 11. In this case, the adjustment range VWx of the second display position is ±b / 2 around the center position of the image display area (-b / 2 ≤ VWx ≤ +b / 2).

[0069] Alternatively, for example, if the size of the image to be displayed is a × b, and the size of the image display area on the display surface 111 of the image display unit 11 is A × B = 2a × b (i.e., the size of the image display area is twice the size of the image to be displayed only in the vertical direction (vertical direction, y direction)), as shown in Figure 8, if the position of the viewer CR's eyes is shifted upward in the vertical direction from the frontal position, the first position control unit 623 shifts the image to be displayed by a second amount downward from the central position of the display surface 111 (the default second display position) and displays it on the image display unit 11. As a result, the first display position of the image VIL is shifted by a first amount downward from the first display position of the image when the image to be displayed is displayed at the central position of the display surface 111. Alternatively, for example, if the position of the viewer's eyes (CR) is lower in the vertical direction than the direct facing position, the first position control unit 623 shifts the image to be displayed upward by a second amount above the center position of the display surface 111 and displays it on the image display unit 11. As a result, the first display position of the image VIR is shifted upward by a first amount above the first display position of the image when the image to be displayed is displayed at the center position of the display surface 111. In this way, the first position control unit 623 shifts the image to be displayed by a second amount in the opposite direction to the shift direction of the viewer's CR relative to the direct facing position FP and displays it on the image display unit 11. In this case, the adjustment range VWy of the second display position is ±a / 2 around the center position of the image display area (-a / 2 ≤ VWy ≤ +a / 2).

[0070] Alternatively, for example, if the size of the image to be displayed is a × b, and the size of the image display area on the display surface 111 of the image display unit 11 is A × B = 2a × 2b (i.e., the size of the image display area is twice the size of the image to be displayed in both the left-right and up-down directions), the first position control unit 623 displays the image to be displayed on the image display unit 11 by shifting it by a second amount in any direction within the 360° range, in the opposite direction to the direction of the viewer CR's displacement relative to the facing position FP. In this case, the adjustment ranges VWx and VWy of the second display position are -b / 2 ≤ VWx ≤ +b / 2 and -a / 2 ≤ VWy ≤ +a / 2. In this case, the input unit 61 includes a pair of first and second sub-input units that receive input of a second amount of movement along the left-right direction, and another pair of first and second sub-input units that receive input of a second amount of movement along the up-down direction.

[0071] Note that the size of the image display area on the display surface 111 of the image display unit 11 is merely an example and is not limited to the example described above.

[0072] In the first embodiment, the first image control unit 622 displays the image on the image display unit 11 at the second display position controlled by the first position control unit 623.

[0073] In a display device 1000a with this configuration, the viewer CR inputs a second movement amount (first movement amount) from the input unit 61, which changes the second display position of the image in the image display area of ​​the image display unit 11. This allows the display device 1000a to display the image at the first display position desired by the viewer CR. Therefore, the visibility of the image (image) can be improved even when the viewer CR views the display device 1000a from an oblique angle. When the viewer CR is seated, the second display position of the image in the image display area of ​​the image display unit 11 is changed according to the second movement amount corresponding to the position of the viewer CR's eyes detected by the detection unit 64. This allows the display device 1000a to automatically display an appropriate image to the viewer CR, and to display an appropriate image for each viewer CR seated in a seat. Therefore, the visibility of the image (image) can be improved even when the viewer CR views the display device 1000a from an oblique angle. When at least one of the seat position and posture is changed, the second display position of the image in the image display area of ​​the image display unit 11 is changed according to a second amount of movement corresponding to at least one of the seat position and posture investigated by the investigation unit 66. This allows the display device 1000a to display an appropriate image for each viewer CR seated in the seat. Therefore, even when the viewer CR views the display device 1000a from an oblique angle, the visibility of the image (imaged image) can be improved. When an image for position setting is displayed and an input operation is received by the input position detection unit 65, the second display position of the image in the image display area of ​​the image display unit 11 may be changed according to a second amount of movement corresponding to the difference between the input position detected by the input position detection unit 65 and the center position of the input position detection unit 65. This allows the display device 1000a to allow the viewer CR to adjust the first display position of the imaged image while viewing the imaged image, and to display the imaged image at the first display position desired by the viewer CR. Therefore, even when the viewer CR views the display device 1000a from an oblique angle, the visibility of the image (image formation) can be improved. After the second display position is changed according to the detection result of the detection unit 64, the viewer CR may fine-tune the second display position by using the input unit 61. After the second display position is changed according to the detection result of the input position detection unit 65, the viewer CR may fine-tune the second display position by using the input unit 61.After the second display position is changed according to the results of the investigation unit 65, the second display position may be fine-tuned by the viewer CR using the input unit 61.

[0074] As described above, in the first embodiment, when the user (viewer) CR views the display device 1000a from an oblique angle, the visibility of the image can be improved by moving the first display position of the image.

[0075] Next, another embodiment will be described.

[0076] (Second Embodiment) In the first embodiment, the display device 1000a moves the first display position of the image by moving the display area that displays the original image to be viewed by the viewer CR within the image display area of ​​the display surface 111 of the image display unit 11 in software. In the second embodiment, the display device 1000b moves the first display position of the image by moving at least one of the image display unit 11 and the optical system 12 in hardware.

[0077] Figure 9 is a block diagram showing the configuration of the display device in the second embodiment. Figure 10 is a diagram illustrating the direction of movement of the optical system when the position of the viewer's eyes is shifted upward in the vertical direction from the direct facing position in the display device of the second embodiment. Figure 11 is a diagram illustrating the direction of movement of the optical system when the position of the viewer's eyes is shifted downward in the vertical direction from the direct facing position in the display device of the second embodiment. In Figures 10 and 11, the upper section of each diagram is a schematic diagram showing the case where the viewer's eyes are positioned in the direct facing position. The lower section of Figure 10 is a schematic diagram showing the case where the viewer's eyes are shifted upward from the direct facing position. The lower section of Figure 11 is a schematic diagram showing the case where the viewer's eyes are shifted downward from the direct facing position. Note that in Figures 10 and 11, for the sake of drawing convenience, the position of the viewer's eyes is shown shifted away from the image display unit 11 (rearward) from the direct position that anticipates the formed images VIF, VIU, and VID.

[0078] The display device 1000b in the second embodiment includes, for example, an image display unit 11 and an optical system 12, as shown in Figure 9. In the example shown in Figure 9, the display device 1000b further includes a movement unit 70, an input unit 71, a control processing unit 72, a storage unit 73, a detection unit 74, an input position detection unit 75, and an investigation unit 76. The image display unit 11, optical system 12, input unit 71, detection unit 74, input position detection unit 75, and investigation unit 76 in the display device 1000b of the second embodiment are the same as those in the display device 1000a of the first embodiment, except that the input unit 71 sets the second movement amount to the second position control unit 723 (described later) instead of the first position control unit 623 setting the second movement amount, so their explanation will be omitted. The display device 1000b in the second embodiment may, like the display device 1000a in the first embodiment, include an image display unit 21 and optical system 22 in the second embodiment, or an image display unit 31 and optical system 32 in the third embodiment, instead of the image display unit 11 and optical system 12 in the first embodiment, and may also include an optical system with other configurations.

[0079] The moving unit 70 is connected to the control processing unit 72 and is a mechanism that moves at least one of the image display unit 11 and the optical system 12 according to the control of the control processing unit 72. The at least one is moved such that the second display position of the image displayed on the image display unit 11 moves along the display surface 111 of the image display unit 11 in a direction parallel to the display surface 111. If the direction in which the at least one moves is called the direction of movement, then the direction of movement is, for example, the horizontal direction (left-right direction, X direction) when the display device 1000b is installed. Alternatively, for example, the direction of movement is the vertical direction (up-down direction, Y direction) when the display device 1000b is installed. Alternatively, for example, the direction of movement is the diagonal direction (upward right direction or downward right direction) when the display device 1000b is installed. The moving unit 70 includes, for example, an X-stage that moves in one direction. The X-stage is fixedly attached to, for example, a support that supports the image display unit 11 and the optical system 12 such that the one direction is along the direction of movement. When the image display unit 11 moves, the image display unit 11 is fixedly mounted on the stage, and the optical system 12 is fixedly mounted on the support. When the optical system 12 moves, the optical system 12 is fixedly mounted on the stage, and the image display unit 11 is fixedly mounted on the support. When the image display unit 11 and the optical system 12 move, the image display unit 11 and the optical system 12 are fixedly mounted on the stage. When each optical element 13 to 16 constituting the optical system 12 is moved individually, an X-stage is provided for each optical element 13 to 16 to be moved. The same applies to the example of the moving unit 70 described later. Alternatively, for example, the moving unit 61 includes a rack and pinion. The pinion of the rack and pinion is mounted on the output shaft of a motor, such as a stepping motor. The motor is fixedly mounted on the support such that the extension direction of the rack of the rack and pinion is along the direction of movement. When the motor operates and the pinion rotates, the rack moves along its extension direction. When the image display unit 11 is moved, the image display unit 11 is fixedly mounted on the rack, and the optical system 12 is fixedly mounted on the support.When the optical system 12 is moved, the optical system 12 is fixedly mounted on the rack, and the image display unit 11 is fixedly mounted on the support. When the image display unit 11 and the optical system 12 are moved, the image display unit 11 and the optical system 12 are fixedly mounted on the rack.

[0080] The moving unit 70 may move at least one of the image display unit 11 and the optical system 12 in linearly independent first and second directions, respectively. For example, the moving unit 70 moves at least one of the two in the horizontal direction (X direction) and the vertical direction (Y direction), respectively. In this case, the moving unit 70 includes, for example, an XY stage in which the stage moves in the X direction and the Y direction, respectively. Alternatively, for example, the moving unit 70 includes a first rack and pinion that moves its rack in the X direction and a second rack and pinion that moves its rack in the Y direction.

[0081] The storage unit 73 is connected to the control processing unit 72 and is a circuit that stores various predetermined programs and various predetermined data in accordance with the control of the control processing unit 72. The various predetermined programs include, for example, a control processing program, and the control processing program includes, for example, a control program, a second image control program, a second position control program, a first processing program, a second processing program, and a third processing program. The control program, second image control program, first processing program, second processing program, and third processing program in these second embodiments are the same as the control program, first image control program, first processing program, second processing program, and third processing program in the first embodiment, except that the first to third processing programs set the second movement amount in the second position control program instead of setting the second movement amount in the first position control program, so their explanation will be omitted. The second position control program controls the movement unit 70 according to a second movement amount (first movement amount) so that at least one of the image display unit 11 and the optical system 12 moves along the display surface 111 of the image display unit 11 in a direction parallel to the display surface 111. The various predetermined data include data necessary for executing each of these programs.

[0082] The control processing unit 72 is a circuit for controlling the first display position of the image (the second display position of the image displayed on the image display unit 11) by controlling each part 11, 70, 71, 73-76 of the display device 1000b according to the function of each part. When the control processing program is executed, the control processing unit 72 is functionally configured with the control unit 721, the second image control unit 722, the second position control unit 723, the first processing unit 724, the second processing unit 725, and the third processing unit 726. The control unit 721, second image control unit 722, first processing unit 724, second processing unit 725, and third processing unit 726 in these second embodiments are the same as the control unit 621, first image control unit 622, first processing unit 624, second processing unit 625, and third processing unit 626 in the first embodiment, except that the first to third processing units 724 to 726 set the second movement amount in the second position control unit 723 instead of the first position control unit 623 setting the second movement amount. Therefore, their description will be omitted.

[0083] The second position control unit 723 controls the movement unit 70 according to a second movement amount (first movement amount) so that at least one of the image display unit 11 and the optical system 12 moves along the display surface 111 of the image display unit 11 in a direction parallel to the display surface 111. More specifically, when the input unit 71 receives input for the second movement amount and the second movement amount is set, the second position control unit 723 controls the movement unit 70 so that it becomes the second movement amount input by the input unit 71. When the second movement amount is set by the first processing unit 724, the second position control unit 723 controls the movement unit 70 so that it becomes the second movement amount determined by the first processing unit 724. When the second movement amount is set by the second processing unit 725, the second position control unit 723 controls the movement unit 70 so that it becomes the second movement amount determined by the second processing unit 725. When the third processing unit 726 sets the second movement amount, the second position control unit 723 controls the movement unit 70 so that it matches the second movement amount determined by the third processing unit 726. As a result, the first display position of the image is moved.

[0084] For example, when only the image display unit 11 of the image display unit 11 and optical system 12 is moved by the moving unit 70, the second position control unit 723 controls the moving unit 70 according to the second amount of movement so that the image display area on the display surface 111 of the image display unit 11 is located at the second display position of the image in the first embodiment, and moves the image display unit 11 by the moving unit 70. In this case, the diameter of the optical system 12 should be sized to cover the movement range of the image display unit 11.

[0085] Alternatively, for example, in the case where only the optical system 22 of the image display unit 21 and optical system 22 in the second embodiment is moved by the moving unit 70, as shown in Figure 10, if the position of the viewer CR's eyes is shifted upward in the vertical direction from the frontal position, the second position control unit 723 controls the moving unit 70 according to a second amount of movement so that the optical axis of the optical system 22 is shifted upward and diagonally on the viewer CR side, as shown in the lower part of Figure 10, relative to the optical axis AXN when the viewer CR is in the frontal position as shown in the upper part of Figure 10, and moves the optical system 12 by the moving unit 70. As a result, the first display position of the image VIU is shifted downward by a first amount of movement from the first display position of the image VIF when the viewer CR is in the frontal position. As shown in Figure 11, if the position of the viewer CR's eyes is lower in the vertical direction than the frontal position, the second position control unit 723 controls the movement unit 70 according to a second movement amount so that the optical axis of the optical system 22 is shifted downward and obliquely on the viewer CR side, as shown in the lower part of Figure 11, relative to the optical axis AXN when the viewer CR is in the frontal position, as shown in the upper part of Figure 11, and moves the optical system 12 by the movement unit 70. As a result, the first display position of the image VID is shifted upward by a first movement amount compared to the first display position of the image VIF when the viewer CR is in the frontal position.

[0086] Alternatively, for example, when both the image display unit 11 and the optical system 12 are moved by the moving unit 70, the second position control unit 723 controls the moving unit 70 according to the second amount of movement so that the second amount of movement is shared between the image display unit 11 and the optical system 12, and moves the image display unit 11 and the optical system 12 respectively by the moving unit 70.

[0087] In the display device 1000b with this configuration, when the viewer CR inputs a second movement amount (first movement amount) from the input unit 71, at least one of the image display unit 11 and the optical system 12 moves according to the second movement amount, and the second display position of the image displayed in the image display area of ​​the image display unit 11 is changed. As a result, the display device 1000b can display the image at the first display position desired by the viewer CR. Therefore, even when the viewer CR views the display device 1000b from an oblique angle, the visibility of the image (imaged image) can be improved. When the viewer CR sits down, at least one of the image display unit 11 and the optical system 12 moves according to a second movement amount corresponding to the position of the viewer CR's eyes detected by the detection unit 64, and the second display position of the image displayed in the image display area of ​​the image display unit 11 is changed. As a result, the display device 1000b can automatically display an appropriate image to the viewer CR, and can display an appropriate image for each viewer CR seated in the seat. Therefore, even when the viewer CR views the display device 1000b from an oblique angle, the visibility of the image (imaged image) can be improved. When at least one of the seat position and posture is changed, at least one of the image display unit 11 and the optical system 12 is moved according to a second amount of movement corresponding to at least one of the seat position and posture investigated by the investigation unit 76, and the second display position of the image displayed in the image display area of ​​the image display unit 11 is changed. As a result, the display device 1000b can display an appropriate image for each viewer CR seated in the seat. Therefore, even when the viewer CR views the display device 1000b from an oblique angle, the visibility of the image (imaged image) can be improved. When an image for position setting is displayed and an input operation is received by the input position detection unit 75, at least one of the image display unit 11 and the optical system 12 may be moved according to a second amount of movement corresponding to the difference between the input position detected by the input position detection unit 75 and the center position of the input position detection unit 75, and the second display position of the image displayed in the image display area of ​​the image display unit 11 may be changed. As a result, the display device 1000a allows the viewer CR to adjust the first display position of the image while viewing the image, and to display the image at the first display position desired by the viewer CR. Therefore, even when the viewer CR views the display device 1000a from an oblique angle, the visibility of the image (image) can be improved.Furthermore, as in the first embodiment, fine adjustments may be made.

[0088] As described above, in the second embodiment, when the user (viewer) CR views the display device 1000b from an oblique angle, the visibility of the image can be improved by moving the first display position of the image.

[0089] Next, another embodiment will be described.

[0090] (Third Embodiment) In the first embodiment, the display device 1000a displays one image on the image display unit 11, but in the third embodiment, the display device 1000c displays multiple images on the image display unit 11, and at least one of the first display positions of each of the multiple image-formed images formed by the optical system from the multiple images is individually movable.

[0091] Figure 12 is a block diagram showing the configuration of the display device in the third embodiment. Figure 13 is a diagram illustrating the image formed by the display device in the third embodiment.

[0092] The display device 1000c in the third embodiment includes, for example, an image display unit 11 and an optical system 12, as shown in Figure 12. In the example shown in Figure 12, the display device 1000c further includes an input unit 81, a control processing unit 82, a storage unit 83, a detection unit 84, an input position detection unit 85, and a search unit 86.

[0093] The image display unit 11 is the same as the image display unit 11 in the display device 1000a of the first embodiment, except that it displays multiple images, so its description is omitted. The optical system 12 is the same as the optical system 12 in the display device 1000a of the first embodiment, except that it forms multiple image-formed images for each of the multiple images displayed on the image display unit 11, so its description is omitted.

[0094] The display device 1000c in the third embodiment may, like the display device 1000a in the first embodiment, include an image display unit 21 and optical system 22 in the second embodiment, or an image display unit 31 and optical system 32 in the third embodiment, instead of the image display unit 11 and optical system 12 in the first embodiment, and may also include an optical system with other configurations.

[0095] The input unit 81, detection unit 84, input position detection unit 85, and investigation unit 86 in the display device 1000a of the third embodiment are the same as the input unit 61, detection unit 64, input position detection unit 65, and investigation unit 66 in the display device 1000a of the first embodiment, except that each is provided in accordance with at least one image among the plurality of image images and functions for that image image, so their description will be omitted. Of course, since it is at least one image among the plurality of image images, in the case of two or more image images, each of these input unit 81, detection unit 84, input position detection unit 85, and investigation unit 86 is provided individually in accordance with each of the two or more image images and functions for that image image. In this case, each of the input unit 81, detection unit 84, input position detection unit 85, and investigation unit 86 may include devices that are shared by multiple users.

[0096] The storage unit 83 is connected to the control processing unit 82 and is a circuit that stores various predetermined programs and various predetermined data in accordance with the control of the control processing unit 82. The various predetermined programs include, for example, a control processing program, and the control processing program includes, for example, a control program, a third image control program, a third position control program, a first processing program, a second processing program, and a third processing program. The control program in the third embodiment is the same as the control program in the first embodiment, so its description is omitted. The third position control program, first processing program, second processing program, and third processing program in these third embodiments are the same as the first position control program, first processing program, second processing program, and third processing program in the first embodiment, except that they each function for at least one image among the plurality of image-formed images, so their description is omitted. Each of these third position control program, first processing program, second processing program, and third processing program may be provided for at least one of the plurality of image-formed images, corresponding to that image-formed image; however, since they are programs, they are created here to be shareable. The third image control program is a program that controls the image display unit 11 so that a plurality of images are displayed on the display surface 111 of one image display unit 11. The various predetermined data include data necessary for executing each of these programs.

[0097] The control processing unit 82 is a circuit for controlling the image display unit 11 to display multiple images on the image display unit 11 in order to form multiple image-formed images by controlling each part 11, 81, 83-86 of the display device 1000c according to the function of each part. When the control processing program is executed, the control unit 821, the third image control unit 822, the third position control unit 823, the first processing unit 824, the second processing unit 825, and the third processing unit 826 are functionally configured in the control processing unit 822. The control unit 821 in the third embodiment is the same as the control unit 621 in the first embodiment, so its description is omitted. The third position control unit 823, first processing unit 824, second processing unit 825, and third processing unit 826 in these third embodiments are the same as the first position control unit 623, first processing unit 624, second processing unit 625, and third processing unit 626 in the first embodiment, except that each functions for at least one image among the plurality of image-formed images, so their description is omitted. Note that each of the third position control unit 823, first processing unit 824, second processing unit 825, and third processing unit 826 may be provided in accordance with at least one image among the plurality of image-formed images, but since they are functionally provided in the control processing unit 82, they are functionally provided in the control processing unit 82 so that they can be shared.

[0098] The third image control unit 822 controls the image display unit 11 so that multiple images are displayed on the display surface 111 of a single image display unit 11. For example, the third image control unit 822 controls the image display unit 11 so that multiple images are displayed sequentially in a line along one direction on the image display unit 11. The third image control unit 822 may also display the multiple images along one direction by forming a non-image display area between two adjacent images. A non-image display area that does not display a significant image is, for example, an area having a predetermined width in the line along one direction and extending in a direction perpendicular to the line along one direction. The line along one direction is, for example, the horizontal direction (left-right direction, X direction) when the display device 1000c is installed. Alternatively, for example, the line along one direction is the vertical direction (up-down direction, Y direction) when the display device 1000c is installed. Alternatively, for example, the direction of movement is the diagonal direction (up-right direction or down-right direction) when the display device 1000c is installed.

[0099] More specifically, the display device 1000c further includes a window member that forms a viewing window, and the image display unit 11, the optical system 12, and the window member are arranged in the order of image display unit 11, optical system 12, and the window member. The plurality of images are first and second images. In this case, the third image control unit 822 controls the image display unit 11 to display the first image on one side of one direction and the second image on the other side of the one direction. When the first and second images are displayed on the image display unit 11 in this way, for example, as shown in Figure 13, the first viewing position VP1 for viewing the first image VI1 of the first image is located on the opposite side of the window member from the arrangement position of the optical system 12 and on the other side of the one direction. The second viewing position VP2 for viewing the second image VI2 of the second image is located on the opposite side of the window member from the arrangement position of the optical system 12 and on the one side of the one direction. In Figure 13, the line segment CL is a straight line passing through the center position of the display surface 111 in the image display unit 11 and the center position of the viewing window, respectively. For example, consider a display device 1000c mounted as the CID of a vehicle VC. In this case, if the vehicle VC is right-hand drive, the first viewer CR1 who views the first image VI1 at the first viewing position VP1 is the driver seated in the driver's seat. The second viewer CR2 who views the second image VI2 at the second viewing position VP2 is the driver seated in the driver's seat.

[0100] Furthermore, if the display device 1000c further includes a window member that forms a viewing window, the image display unit 11, the optical system 12, and the window member may be arranged such that the first distance from the first central position of the first image to the third central position of the viewing window is different from the second distance from the second central position of the second image to the third central position.

[0101] Furthermore, the input position detection unit 65 may form a touch panel display. In this case, the image formed, which is displayed at a distance from the input position detection unit 65, can be operated by the input position detection unit 65. In this case, the image display unit 11, the optical system 12, and the input position detection unit 65 may be arranged such that the first central position in the image formed of the image displayed on the image display unit 11 lies on a virtual line passing through the second central position on the operating surface of the input position detection unit 65 and the position of the eyes of the viewer who views the image formed. The input position detection unit 65 is arranged at a predetermined distance from the display surface 111 of the image display unit 11. For example, the image display unit 11, the optical system 12, and the input position detection unit 65 are arranged such that the first central position in the first image formed VI1 of the first image displayed on the image display unit 11 lies on a first virtual line passing through the second central position on the operating surface of the input position detection unit 65 and the position of the eyes of the first viewer CR1 who views the first image formed VI1. The image display unit 11, the optical system 12, and the input position detection unit 65 are arranged such that the first central position of the second image VI2 of the second image displayed on the image display unit 11 lies on a second imaginary line passing through the second central position on the operating surface of the input position detection unit 65 and the position of the eyes of the second viewer CR2 who views the second image VI2. This arrangement allows for proper operation even when the viewer CR is not directly facing the device and is viewing the image while operating the input position detection unit 65.

[0102] In a display device 1000c with this configuration, multiple images are displayed on the image display unit 11 so that each of the multiple viewers CRn can view them one-to-one at each of the multiple viewing positions VPn, and multiple imaged images VIN for each of the multiple images displayed on the image display unit 11 are formed by the optical system 12.

[0103] As described above, the display device 1000c in the third embodiment can show the image to multiple users (viewers) CR with just one unit.

[0104] Next, another embodiment will be described.

[0105] (Fourth Embodiment) In the third embodiment, the display device 1000c displays multiple images on an image display unit 11 as a single device, but in the fourth embodiment, the display device 1000d displays multiple images using multiple devices, and at least one of the first display positions of each of the multiple image-formed images formed by the optical system from the multiple images is individually movable.

[0106] Figure 14 is a block diagram showing the configuration of the display device in the fourth embodiment. Figure 14 is a diagram illustrating the adjustment of the first display position of the image in the fourth embodiment.

[0107] The display device 1000d in the fourth embodiment includes, for example, an image display unit 11 and an optical system 12, as shown in Figure 14. In the example shown in Figure 14, the display device 1000d further includes a movement unit 90, an input unit 91, a control processing unit 92, a storage unit 93, a detection unit 94, an input position detection unit 95, and a search unit 96.

[0108] The image display unit 11 in the display device 1000d of the fourth embodiment is the same as the image display unit 11 in the display device 1000a of the first embodiment, except that it comprises a plurality of devices (display units) for displaying each of the plurality of images, so its description is omitted. The optical system 12 is the same as the optical system 12 in the display device 1000a of the first embodiment, except that it forms a plurality of image-formed images for each of the plurality of images displayed on the image display unit 11, so its description is omitted. Such an optical system 12 is acceptable, but if the first display position of at least one of the plurality of image-formed images is to be moved by moving the optical system, this moving optical system is provided separately.

[0109] The display device 1000d in the fourth embodiment may, like the display device 1000a in the first embodiment, include an image display unit 21 and optical system 22 in the second embodiment, or an image display unit 31 and optical system 32 in the third embodiment, instead of the image display unit 11 and optical system 12 in the first embodiment, and may also include an optical system with other configurations.

[0110] The moving unit 90 in the display device 1000d of the fourth embodiment is the same as the moving unit 70 in the display device 1000b of the second embodiment, except that it is provided in accordance with at least one of the plurality of image-formed images and functions for that image-formed image, so its description will be omitted. Of course, since it is at least one of the plurality of image-formed images, in the case of two or more image-formed images, the moving unit 90 is provided individually for each of the two or more image-formed images, in accordance with that image-formed image, and functions for that image-formed image.

[0111] The input unit 91, detection unit 94, input position detection unit 95, and investigation unit 96 in the display device 1000d of the fourth embodiment are the same as the input unit 61, detection unit 64, input position detection unit 65, and investigation unit 66 in the display device 1000a of the first embodiment, except that each is provided in accordance with at least one image among the plurality of image images and functions for that image image, so their description will be omitted. Of course, since it is at least one image among the plurality of image images, in the case of two or more image images, each of these input unit 91, detection unit 94, input position detection unit 95, and investigation unit 96 is provided individually in accordance with each of the two or more image images and functions for that image image. In this case, each of the input unit 91, detection unit 94, input position detection unit 95, and investigation unit 96 may include devices that are shared by multiple users.

[0112] The storage unit 93 is connected to the control processing unit 92 and is a circuit that stores various predetermined programs and various predetermined data in accordance with the control of the control processing unit 92. The various predetermined programs include, for example, a control processing program, and the control processing program includes, for example, a control program, a fourth image control program, a fourth position control program, a first processing program, a second processing program, and a third processing program. The control program in the fourth embodiment is the same as the control program in the first embodiment, so its description is omitted. The fourth position control program in the fourth embodiment is the same as the second position control program in the second embodiment, except that it functions for at least one of the plurality of image-formed images, so its description is omitted. The first processing program, second processing program, and third processing program in these fourth embodiments are the same as the first processing program, second processing program, and third processing program in the first embodiment, except that they each function for at least one of the plurality of image-formed images, so their descriptions are omitted. Each of these fourth position control program, first processing program, second processing program, and third processing program may be provided for at least one of the plurality of image-formed images, corresponding to that image-formed image; however, since they are programs, they are created here to be shareable. The fourth image control program is a program that controls the image display unit 11 so that it displays an image on each of the plurality of devices (display units) in the image display unit 11. The various predetermined data include data necessary for executing each of these programs.

[0113] The control processing unit 92 is a circuit for controlling the image display unit 11 to display images on each of the multiple devices (display units) in the image display unit 11 in order to form multiple image-formed images by controlling each of the parts 11, 90, 91, 93 to 96 of the display device 1000d according to the function of each part. When the control processing program is executed, the control processing unit 92 is functionally configured to include the control unit 921, the fourth image control unit 922, the fourth position control unit 923, the first processing unit 924, the second processing unit 925, and the third processing unit 926. The control unit 921 in the fourth embodiment is the same as the control unit 621 in the first embodiment, so its description is omitted. The fourth position control unit 923 in the fourth embodiment is the same as the second position control unit 723 in the second embodiment, except that it functions for at least one of the multiple image-formed images, so its description is omitted. The first processing unit 924, second processing unit 925, and third processing unit 926 in these fourth embodiments are the same as the first processing unit 624, second processing unit 625, and third processing unit 626 in the first embodiment, except that each functions for at least one image among the plurality of image-formed images, so their description is omitted. Note that each of these fourth position control unit 923, first processing unit 924, second processing unit 925, and third processing unit 926 may be provided in accordance with at least one image among the plurality of image-formed images, but since they are functionally provided in the control processing unit 92, they are functionally provided in the control processing unit 92 so that they can be shared.

[0114] The fourth image control unit 822 controls the image display unit 11 so that it displays an image on each of the plurality of devices (display units) in the image display unit 11.

[0115] In a display device 1000d with this configuration, images are displayed on each of the multiple devices (display units) in the image display unit 11 so that each of the multiple viewers CRn can view the images one-to-one at each of the multiple viewing positions, and these multiple image-formed images are formed by the optical system 12.

[0116] As described above, the display device 1000d in the fourth embodiment can show the image to each of the multiple users (viewers) CR.

[0117] In addition, in the display devices 1000a to 1000d of the first to fourth embodiments described above, distortion correction may be performed to deform the image from a rectangle to a trapezoid according to the second display position of the image (first display position of the image-formed image) (first deformation form).

[0118] Figure 15 is a diagram illustrating distortion correction in the first modified form of the display device. The upper part of Figure 15 is a schematic diagram showing the case where distortion correction is performed. The lower part of Figure 15 is a schematic diagram showing the case where distortion correction is not performed.

[0119] When the viewer CR faces the display devices 1000a to 1000d directly, the rectangular image displayed on the image display unit 11 is viewed by the viewer CR with virtually no distortion. On the other hand, when the viewer CR does not face the display devices 1000a to 1000d directly, that is, when the viewer CR looks at the display devices 1000a to 1000d at an angle, for example, as shown on the left side of the lower part of Figure 15, the rectangular image displayed on the image display unit 11 is distorted into a trapezoid shape according to the position of the viewer CR's eyes, as shown on the right side of the lower part of Figure 15, and the resulting image is viewed by the viewer CR. Figure 15 shows the case when the viewer CR looks at the resulting image at an angle from below the installation position of the display devices 1000a to 1000d.

[0120] To address this, the first to fourth image control units 622 to 922 in the display devices 1000a to 1000d display the image on the image display unit 11 in a trapezoidal shape corresponding to the position of the viewer CR's eyes, using known and conventional means, for example, as shown on the left side of the upper part of Figure 15. For example, if distortion correction is not applied and the image is displayed as an x ​​x y rectangle, as shown on the lower part of Figure 15, and the image is perceived by the viewer CR as a trapezoid of (x + △x) x (y + △y), then the first to fourth image control units 622 to 922 display the image on the image display unit 1 as a trapezoid of (x - △x) x (y - △y). As a result, the image is perceived by the viewer CR as an x ​​x y rectangle, as shown on the right side of the upper part of Figure 15.

[0121] Furthermore, in the display devices 1000a to 1000d of the first to fourth embodiments described above, the terminal device may be used as the image display unit 11 (second modified form).

[0122] Figure 16 is a diagram illustrating the detachable part in the second modified form of the display device.

[0123] In this case, each of the display devices 1000a to 1000d further comprises a detachable part 102 and interface parts (IF parts) 67 to 97, as shown by dashed lines in Figures 1, 9, 12, and 14, respectively.

[0124] The detachable section 102 is a component for attaching and detaching the terminal device 101. The terminal device 101 is a device that inputs and outputs data to and from external devices and displays images. The terminal device 101 is, for example, a smartphone, a tablet computer, or a phablet. The detachable section 102 includes, for example, a left-end detachable member 102a, a right-end detachable member 102b, and a lower-end detachable member 102c, as shown in Figure 16. Each of these left-end detachable member 102a, right-end detachable member 102b, and lower-end detachable member 102c has a groove formed therein to receive the outer edge of the terminal device 101. The lower-end detachable member 102 is fixedly connected to the left-end detachable member 102a so as to intersect at approximately 90° at its left end. The lower-end detachable member 102 is fixedly connected to the right-end detachable member 102b so as to intersect at approximately 90° at its right end. These left-end detachable member 102a, lower-end detachable member 102c, and right-end detachable member 102b have a roughly U-shape when viewed from the front. When attaching the terminal device 101 to the detachable part 102, the observer CR manually inserts the terminal device 101 into the left-end detachable member 102a and right-end detachable member 102b from above the detachable part 102 so that the left and right outer edges of the terminal device 101 fit into the grooves (recesses) of the left-end detachable member 102a and right-end detachable member 102b, and then fits the lower outer edge of the terminal device 101 into the groove of the lower-end detachable member 102c, bringing the terminal device 101 into contact with the lower-end detachable member 102c. This fixes the terminal device 101 to the detachable part 102. The terminal device 101 attached to the detachable part 102 is used as the image display unit 1. When removing the terminal device 101 from the detachment section 102, the observer CR manually removes the terminal device 101 from the detachment section 102.

[0125] Such a detachable part 102 is, for example, located on the back of a seat in a vehicle VC or on the front of a RSE provided on the back.

[0126] IF sections 67 to 97 are circuits that are connected to the terminal device 101 attached to the detachable section 102 via a cable such as a USB cable, and input and output the data to and from the terminal device 101. IF sections 67 to 97 are, for example, interface circuits using the Bluetooth® standard and interface circuits using the USB (Universal Serial Bus) standard.

[0127] The optical system 12 then forms an image of the image displayed on the terminal device 101 attached to the attachment unit 102. The input position detection units 65 to 95 are each used as touch panel displays for the terminal device 101. The control processing units 62 to 92 each output the input position detected by the input position detection units 65 to 95 to the terminal device 101 via the IF units 67 to 97.

[0128] When adjusting the second display position of the image, control processing units 62 to 92 each output a position setting image RIS to the terminal device 101 via IF units 67 to 97 for display on the terminal device 101. When the second movement amount is set, the first to fourth position control units 623 to 923 each output a control signal to the terminal device 101 via IF units 67 to 97 to move the display position of the image in accordance with the second movement amount, thereby moving the image to display.

[0129] According to this second modified form, for example, a terminal device 101 owned by the viewer CR can be used as the image display unit 11 of the display devices 1000a to 1000d.

[0130] Furthermore, in the display devices 1000a to 1000d of the first to fourth embodiments described above, the second display position of the image (second movement amount, first display position of the image-formed image) may be stored in the storage units 63 to 93, respectively (third modified form).

[0131] For example, each of the display devices 1000a to 1000d is mounted on the vehicle VC so that the formed image can be viewed by the occupants. Each of the display devices 1000a to 1000d further includes a setting unit that performs setting processing to set the first display position (second display position of the image) of the formed image to the first to fourth position control units 623 to 923.

[0132] As an example of such a setting unit, in the first embodiment, the input unit 61 corresponds to an example of a setting unit that performs setting processing to set the display position of the image-formed image to the control unit. The detection unit 64 and the first processing unit 624 correspond to another example of a setting unit that performs setting processing to set the display position of the image-formed image to the control unit. The input position detection unit 65 and the second processing unit 625 correspond to another example of a setting unit that performs setting processing to set the display position of the image-formed image to the control unit. The investigation unit 66 and the third processing unit 626 correspond to another example of a setting unit that performs setting processing to set the display position of the image-formed image to the control unit.

[0133] In the second embodiment, the input unit 71 corresponds to an example of a setting unit that performs setting processing to set the display position of the image-formed image to the moving unit. The detection unit 74 and the first processing unit 724 correspond to another example of a setting unit that performs setting processing to set the display position of the image-formed image to the moving unit. The input position detection unit 75 and the second processing unit 725 correspond to another example of a setting unit that performs setting processing to set the display position of the image-formed image to the moving unit. The investigation unit 76 and the third processing unit 726 correspond to another example of a setting unit that performs setting processing to set the display position of the image-formed image to the moving unit.

[0134] In the third embodiment, the input unit 81 corresponds to an example of a setting unit that performs setting processing to set the display position of at least one image among the plurality of image images to the control unit. The detection unit 84 and the first processing unit 824 correspond to another example of a setting unit that performs setting processing to set the display position of at least one image among the plurality of image images to the control unit. The input position detection unit 85 and the second processing unit 825 correspond to another example of a setting unit that performs setting processing to set the display position of at least one image among the plurality of image images to the control unit. The investigation unit 86 and the third processing unit 826 correspond to another example of a setting unit that performs setting processing to set the display position of at least one image among the plurality of image images to the control unit.

[0135] In the fourth embodiment, the input unit 91 corresponds to an example of a setting unit that performs setting processing to set the display position of at least one image among the plurality of image-formed images to the moving unit. The detection unit 94 and the first processing unit 924 correspond to another example of a setting unit that performs setting processing to set the display position of at least one image among the plurality of image-formed images to the moving unit. The input position detection unit 95 and the second processing unit 925 correspond to another example of a setting unit that performs setting processing to set the display position of at least one image among the plurality of image-formed images to the moving unit. The investigation unit 96 and the third processing unit 926 correspond to another example of a setting unit that performs setting processing to set the display position of at least one image among the plurality of image-formed images to the moving unit.

[0136] The setting unit performs the setting process before the occupant drives the vehicle, and the control units 621 to 921 each store display position information representing the second display position (second movement amount) of the image displayed on the image display unit 11 in the storage units 63 to 93. The setting process may be performed automatically, for example, by detecting the boarding of the vehicle and the start of use of the vehicle VC, or it may be performed by instruction from the occupant.

[0137] Each of the control units 621 to 921 may store the display position information in the storage unit 63 in association with an identifier (crew member ID) that identifies and distinguishes the crew member. The crew member ID is, for example, the crew member's name. This allows for the storage of display position information for each individual crew member for multiple crew members.

[0138] If the display position information is stored in the storage units 63 to 93, the setting unit may output the second display position (second movement amount) of the image represented by the display position information stored in the storage units 63 to 93 to the first to fourth position control units 623 to 923 to set it. This allows the image to be displayed at a second display position corresponding to the occupant.

[0139] The display devices 1000a to 1000d may further include recognition units 68 to 98 for recognizing occupants, as shown by dashed lines in Figures 1, 9, 12, and 14, respectively. Each of the recognition units 68 to 98 includes, for example, an input unit for receiving input of an occupant ID. Alternatively, for example, each of the recognition units 68 to 98 includes a facial recognition device for authenticating an occupant by the occupant's face. The facial recognition device includes a facial recognition storage unit that stores characteristic quantities for identifying and distinguishing the occupant's face and the occupant's occupant ID in association with each other, a facial recognition detection unit that detects the occupant's characteristic quantities, and a facial recognition processing unit that searches the facial recognition storage unit for and extracts an identifier for the occupant corresponding to the occupant's characteristic quantities detected by the facial recognition detection unit. Alternatively, for example, the recognition units 68 to 98 each include a recognition storage unit that stores the weight of an occupant and the occupant ID of the occupant in association with each other, a weighing scale that measures the weight of the occupant, and a recognition processing unit that searches the recognition storage unit for and extracts the occupant ID of the occupant corresponding to the weight of the occupant measured by the weighing scale.

[0140] Each of the control units 621 to 921 stores the display position information in the storage units 63 to 93, associating it with the crew ID corresponding to the crew member recognized by the recognition units 68 to 98. Each of the control units 621 to 921 retrieves the display position information associated with the crew ID corresponding to the crew member recognized by the recognition units 68 to 98 from the storage units 63 to 93, and outputs the second display position (second movement amount) of the image represented by the retrieved display position information to the first to fourth position control units 623 to 923 for setting.

[0141] According to this, the system can automatically identify and recognize the occupants, and display the image at a second display position corresponding to the occupants.

[0142] Furthermore, in the display devices 1000c and 1000d of the third and fourth embodiments described above, among the multiple image-formed images, the remaining image-formed images, excluding the image-formed image that is viewed by the viewer CR performing the input operation, may include an image representing the operation status (fourth modified form).

[0143] The images displayed on the image display unit 11 are images in which some or all of the multiple images display the same content. That is, the images are image-formed images in which some or all of the multiple image-formed images formed by each of the multiple images display the same content. The content comprises one or more operable elements. The third and fourth image control units 822 and 922 each include an operation status element, which is an element representing the operation status, in the content of the remaining images among the images displaying the same content, excluding the image in which the element is being operated.

[0144] Figure 17 is a diagram illustrating a fourth modified form of the display device. For example, the image displaying the same content is a position-setting image RIS, and the operable element is a marker MK indicating the central position of the image RIS. For example, as shown in Figure 17, while the marker MK in the position-setting image RIS, which becomes the first image VI1 viewed by the first viewer CR1, is being input, the third and fourth image control units 822 and 922 control the image display unit 11 to display the position-setting image RIS as it is, which becomes the first image VI1 viewed by the first viewer CR1, and control the image display unit 11 to further include an operation status element in the position-setting image RIS, which becomes the second image VI2 viewed by the second viewer CR2. The operation status element is, for example, a message indicating the operation status, such as "Operating". Whether the first viewer CR1 and the second viewer CR2 perform an input operation are, for example, input by the first and second viewer CR1 and CR2 from the input position detection units 85 and 95 before the position setting image RIS is displayed on the image display unit 11. The start and end of the input operation are, for example, input by the first and second viewer CR1 and CR2 from the input position detection units 85 and 95. This allows the presence of a viewer CR performing an input operation to be notified to other viewer CRs.

[0145] Furthermore, if the multiple images display different content, the third and fourth image control units 822 and 922 may each control the image display unit 11 to maintain the content in the remaining images among the multiple images, excluding the image in which the element is being manipulated. For example, when a second viewer CR2 is viewing the car navigation screen, while the marker MK in the position setting image RIS, which becomes the first image VI1 viewed by the first viewer CR1, is being input, the third and fourth image control units 822 and 922 control the image display units 11 and 11-1 to display the position setting image RIS, which becomes the first image VI1 viewed by the first viewer CR1, as is, and control the image display units 11 and 11-2 to display the car navigation image, which becomes the second image VI2 viewed by the second viewer CR2, as is. In this case, the remaining images are viewed as they are.

[0146] Here is a summary of some of the disclosures mentioned above.

[0147] In one embodiment of the display device, the image display unit includes an image display area larger than the size of the image, and further includes a control unit that controls the image display unit to move the display position of the image within the image display area.

[0148] In one embodiment, the system further includes a setting unit that performs a setting process to set the display position of at least one of the plurality of image-formed images to the control unit, the control unit moves the display position of the image-formed image according to the display position of the image-formed image set by the setting unit, and the setting unit includes an input unit that receives input of the display position of the image-formed image and sets it to the control unit.

[0149] In one embodiment, the display device according to the above-described embodiment further comprises a setting unit that performs setting processing to set the display position of at least one of the plurality of image-formed images to the control unit, the control unit moves the display position of the image-formed image according to the display position of the image-formed image set by the setting unit, and the setting unit comprises a detection unit that detects the position of the eyes of a viewer viewing the image-formed image, and a first processing unit that determines the display position of the image-formed image based on the eye position detected by the detection unit and sets it to the control unit.

[0150] In one embodiment, the display device according to the above-described embodiment further comprises a setting unit that performs setting processing to set the display position of at least one of the plurality of image images to the control unit, the control unit moves the display position of the image image according to the display position of the image image set by the setting unit, the setting unit has an operating surface and comprises an input position detection unit that detects an input position on the operating surface, and a second processing unit that, when the image image is displayed on the image display unit, determines the display position of the image image based on the difference between the input position detected by the input position detection unit and the center position of the input position detection unit and sets it to the control unit.

[0151] In one embodiment, the display device according to the above-described embodiment further comprises a setting unit that performs setting processing to set the display position of at least one of the plurality of image-formed images to the control unit, the control unit moves the display position of the image-formed image according to the display position of the image-formed image set by the setting unit, the image display unit, the optical system and the control unit are mounted in the vehicle so that the image-formed image can be seen by the occupant, and the setting unit comprises an investigation unit that investigates at least one of the position and posture of the occupant in the seat of the vehicle where the occupant is seated, and a third processing unit that determines the display position of the image-formed image based on at least one of the position and posture investigated by the investigation unit and sets it to the control unit.

[0152] In another embodiment of the display device, the image display unit comprises a plurality of devices for displaying each of the plurality of images, and for at least one of the plurality of image-formed images, the device for displaying the image that will become the image-formed image further comprises a moving unit that moves at least one of the image display unit and the optical system.

[0153] In one embodiment, the display device according to the other embodiment described above further includes a setting unit that performs setting processing to set the display position of at least one of the plurality of image-formed images to the moving unit, the moving unit moves the display position of the image-formed image according to the display position of the image-formed image set by the setting unit, and the setting unit includes an input unit that receives input of the display position of the image-formed image and sets it to the moving unit.

[0154] In one embodiment, the display device according to the other embodiment described above further comprises a setting unit that performs setting processing to set the display position of at least one of the plurality of image-formed images to the moving unit, the moving unit moves the display position of the image-formed image according to the display position of the image-formed image set by the setting unit, and the setting unit comprises a detection unit that detects the position of the eyes of a viewer viewing the image-formed image, and a first processing unit that determines the display position of the image-formed image based on the eye position detected by the detection unit and sets it to the moving unit.

[0155] In one embodiment, the display device according to the other embodiment described above further comprises a setting unit that performs setting processing to set the display position of at least one of the plurality of image images to the moving unit, the moving unit moves the display position of the image image according to the display position of the image image set by the setting unit, the setting unit has an operating surface and comprises an input position detection unit that detects an input position on the operating surface, and a second processing unit that, when the image image is displayed on the image display unit, determines the display position of the image image based on the difference between the input position detected by the input position detection unit and the center position of the input position detection unit and sets it to the moving unit.

[0156] In one embodiment, the display device of the other embodiment described above further comprises a setting unit that performs setting processing to set the display position of at least one of the plurality of image-formed images on the moving unit, the moving unit moves the display position of the image-formed image according to the display position of the image-formed image set by the setting unit, the image display unit, the optical system and the moving unit are mounted on the vehicle so that the image-formed image can be seen by the occupant, and the setting unit comprises a survey unit that examines at least one of the position and posture of the occupant in the seat of the vehicle on which the occupant is seated, and a third processing unit that determines the display position of the image-formed image based on at least one of the position and posture examined by the survey unit and sets it on the moving unit.

[0157] Although embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the embodiments described above.

[0158] For example, the above description concerns a display device equipped with an image display unit, but is not limited to this. For example, the present disclosure may describe a device without an image display unit that is equipped with an optical system. For example, the housing of a display device may have a mounting section on which an image display unit can be installed. The mounting section may be located on a part of the wall surface of the housing, on the inside of the housing, or inside the housing. In this case, the image display unit may be located on the inside of the housing or inside the housing. The mounting section may also be located on the outside of the housing. That is, the image display unit may be located on the outside of the housing. In this case, the housing may have an opening in which a part of the wall surface is cut out. The mounting section may be positioned relative to the housing so that display light emitted from the image display unit installed in the mounting section is guided to the inside of the housing through the opening. The mounting section may be positioned relative to the housing so that display light emitted from the image display unit installed in the mounting section is guided to the inside of the housing through the opening. The mounting section may be connected to the outer wall of the housing, or it may be connected to the outer wall of the housing so as to close at least a part of the opening. A light-transmitting member may be placed in the opening, and this member may be, for example, glass or resin. For example, Figure 1 shows a display device in which an image display unit is installed in the installation section, but the device may not have an image display unit installed in the installation section. In this case, the device may be an image display unit housing device having a housing that includes a viewing section, an optical system, and an installation section in which an image display unit can be installed. The configuration of the display device of each embodiment described above may also be realized in the image display unit housing device. That is, the position of the installation section of the image display unit housing device may be defined so that when an image display unit is installed in the installation section, it becomes the configuration of each embodiment described above. Furthermore, the housing of the image display unit housing device may have an opening, and the image display unit may be insertable through the opening. In this case, the image display unit housing device may have the same configuration as the display device, except that the housing has an opening and the image display unit can be inserted from the outside.

[0159] This application is based on Japanese Patent Application No. 2024-232920, filed on 27 December 2024, the contents of which are included in this application.

[0160] In order to express the present invention, the embodiments have been adequately and fully described above with reference to the drawings. However, those skilled in the art should recognize that it is easy to modify and / or improve upon the above embodiments. Therefore, unless such modifications or improvements implemented by those skilled in the art fall outside the scope of the claims, such modifications or improvements shall be considered to be included within the scope of the claims.

[0161] 1000a-1000d Display Storage 11 Image Display Unit 12 Optical System 70, 90 Movement Unit 61, 71, 81, 91 Input Unit 62, 72, 82, 92 Control Processing Unit 63, 73, 83, 93 Storage Unit 64, 74, 84, 94 Detection Unit 65, 75, 85, 95 Input Position Detection Unit 66, 76, 86, 96 Investigation Unit 621, 721, 821, 921 Control Unit 622, 722, 822, 922 First to Fourth Image Control Unit 623, 723, 823, 923 First to Fourth Position Control Unit 624, 724, 824, 924 First Processing Unit 625, 725, 825, 925 Second Processing Unit 626, 726, 826, 926 Third Processing Unit

Claims

1. A display device comprising an image display unit for displaying an image, and an optical system for forming an image of the image, wherein the display position of the image is movable.

2. The display device according to claim 1, wherein the image display unit comprises an image display area larger than the size of the image, and further comprises a control unit that controls the image display unit to move the display position of the image within the image display area.

3. The display device according to claim 2, further comprising a setting unit that performs setting processing to set the display position of the image formed image to the control unit, the control unit moves the display position of the image formed image according to the display position of the image formed image set by the setting unit, and the setting unit comprises an input unit that receives input of the display position of the image formed image and sets it to the control unit.

4. The display device according to claim 2, further comprising a setting unit that performs setting processing to set the display position of the image formed image to the control unit, the control unit moves the display position of the image formed image according to the display position of the image formed image set by the setting unit, and the setting unit comprises a detection unit that detects the position of the eyes of a viewer viewing the image, and a first processing unit that determines the display position of the image formed image based on the eye position detected by the detection unit and sets it to the control unit.

5. The display device according to claim 2, further comprising a setting unit that performs setting processing to set the display position of the image formed image to the control unit, the control unit moves the display position of the image formed image according to the display position of the image formed image set by the setting unit, and the setting unit has an operating surface and comprises an input position detection unit that detects an input position on the operating surface, and a second processing unit that, when the image formed image is displayed on the image display unit, determines the display position of the image formed image based on the difference between the input position detected by the input position detection unit and a predetermined position of the input position detection unit and sets it to the control unit.

6. The display device according to claim 2, further comprising a setting unit for setting the display position of the image formed, wherein the control unit moves the display position of the image formed according to the display position of the image formed set by the setting unit, the image display unit, the optical system and the control unit are mounted in a vehicle so that the image formed can be seen by the occupants, and the setting unit comprises a survey unit for examining at least one of the position and orientation of the seat in the vehicle, and a third processing unit for determining the display position of the image formed based on at least one of the position and orientation examined by the survey unit and setting it in the control unit.

7. The display device according to claim 1, further comprising a moving unit that moves at least one of the image display unit and the optical system.

8. The display device according to claim 7, further comprising a setting unit that performs setting processing to set the display position of the image-formed image to the moving unit, the moving unit moves the display position of the image-formed image according to the display position of the image-formed image set by the setting unit, and the setting unit comprises an input unit that receives input of the display position of the image-formed image and sets it to the moving unit.

9. The display device according to claim 7, further comprising a setting unit that performs setting processing to set the display position of the image-formed image to the moving unit, the moving unit moves the display position of the image-formed image according to the display position of the image-formed image set by the setting unit, and the setting unit comprises a detection unit that detects the position of the eyes of a viewer viewing the image-formed image, and a first processing unit that determines the display position of the image-formed image based on the eye position detected by the detection unit and sets it to the moving unit.

10. The display device according to claim 7, further comprising a setting unit that performs setting processing to set the display position of the image-formed image to the moving unit, wherein the moving unit moves the display position of the image-formed image according to the display position of the image-formed image set by the setting unit, and the setting unit having an operating surface, comprising an input position detection unit that detects an input position on the operating surface, and a second processing unit that, when the image-formed image is displayed on the image display unit, determines the display position of the image-formed image based on the difference between the input position detected by the input position detection unit and a predetermined position of the input position detection unit and sets it to the moving unit.

11. The display device according to claim 7, further comprising a setting unit for setting the display position of the image-formed image to the moving unit, the moving unit moving the display position of the image-formed image according to the display position of the image-formed image set by the setting unit, the image display unit, the optical system and the moving unit mounted on a vehicle so that the image-formed image can be seen by the occupants, and the setting unit comprising a survey unit for examining at least one of the position and orientation of the seat in the vehicle, and a third processing unit for determining the display position of the image-formed image based on at least one of the position and orientation examined by the survey unit and setting it on the moving unit.

12. The display device according to any one of claims 1 to 11, wherein the image display unit deforms the image from a rectangle to a trapezoid according to the display position of the image.

13. The display device according to claim 5 or 10, further comprising: a detachable unit for attaching and detaching a terminal device that inputs and outputs data to and from an external device and displays an image; and an interface unit connected to the terminal device attached to the detachable unit and for inputting and outputting the data to and from the terminal device, wherein the terminal device attached to the detachable unit is used as the image display unit; the optical system forms an image of the image displayed on the terminal device attached to the detachable unit; the input position detection unit is used as a touch panel display for the terminal device; and the detachable unit is disposed on the back of a seat in a vehicle or on the front of an RSE provided on the back.

14. The display device according to claim 1, wherein the image display unit displays a plurality of images, the optical system forms a plurality of image-formed images for each of the plurality of images displayed on the image display unit, and at least one of the display positions for each of the plurality of image-formed images is individually movable.

15. The display device according to claim 14, further comprising a window member that forms a window, wherein the image display unit, the optical system, and the window member are arranged in the order of the image display unit, the optical system, and the window member, the plurality of images are first and second images, the image display unit displays the first image on one side in one direction and the second image on the other side in the same direction, the first viewing position for viewing the first image of the first image is located on the opposite side of the window member from the arrangement position of the optical system and on the other side in the same direction, and the second viewing position for viewing the second image of the second image is located on the opposite side of the window member from the arrangement position of the optical system and on one side in the same direction.

16. The display device according to claim 14 or claim 15, wherein the image display unit comprises a plurality of devices for displaying each of the plurality of images.

17. The display device according to claim 14 or claim 15, wherein the image display unit comprises a single device that displays the plurality of images along one direction on a single display surface.

18. The display device according to claim 14 or claim 15, wherein the image display unit comprises a single device that displays the plurality of images along one direction by forming a non-image display area between two adjacent images on a single display surface.

19. The display device according to claim 15, wherein the image display unit, the optical system, and the window member are arranged such that the first distance from the first central position of the first image to the third central position of the window is different from the second distance from the second central position of the second image to the third central position.

20. The display device according to claim 14 or 15, wherein some or all of the multiple images display the same content, the content comprises one or more operable elements, and the image display unit includes an operation status element, which is an element representing the operation status, in the content of the remaining images among the images displaying the same content, excluding the image in which the element is being operated.

21. The display device according to claim 14 or 15, wherein the plurality of images are images that display different content from each other, the content comprises one or more operable elements, and the image display unit maintains the content in the remaining images of the plurality of images, excluding the image in which the element is being manipulated.

22. The display device according to claim 14 or claim 15, further comprising an input position detection unit having an operating surface associated with a first position on the display surface of an image display unit, and an input position detection unit for detecting a second position on the operating surface that has been operated on, the input position detection unit transmitting a wavelength band of visible light.

23. The display device according to claim 22, wherein the image display unit, the optical system, and the input position detection unit are arranged such that the first central position in the image of the image is located on a virtual line passing through the second central position on the operating surface of the input position detection unit and the position of the viewer's eyes viewing the image of the image.

24. A vehicle equipped with a display device according to any one of claims 1 to 23.

25. A display system comprising a display device according to any one of claims 1 to 23, and a camera capable of communicating with the display device, wherein the image display unit displays an image captured by the camera.

26. A mobile body comprising the display system described in claim 25.

27. An image display unit housing device comprising: an installation unit on which an image display unit for displaying an image can be installed; and an optical system for forming an image of the image, wherein the display position of the image is movable.

Images