WO2016013081A1

WO2016013081A1 - Display device, display method and display program

Info

Publication number: WO2016013081A1
Application number: PCT/JP2014/069579
Authority: WO
Inventors: 修己靭矢; 柳澤　琢麿; 敏晴江塚; 卓也根上; 昌夫中根
Original assignee: パイオニア株式会社
Priority date: 2014-07-24
Filing date: 2014-07-24
Publication date: 2016-01-28

Abstract

A display device which displays an image toward an observer is provided with one display, an optical element, and a reflection means. The display displays a first image in a first region of a display surface and displays a second image in a second region of the display surface. The optical element is disposed between the first region of the display surface and the observer, and has a first surface which light emitted from the first region and constituting the first image enters, and a second surface facing the first surface. The reflection means reflects light emitted from the second region of the display surface and constituting the second image toward the second surface of the optical element. The optical element transmits the light constituting the first image and entering the first surface toward the observer, and reflects the light reflected by the reflection means and entering the second surface toward the observer.

Description

Display device, display method, and display program

The present invention relates to a method for displaying information using a real image and a virtual image.

A method for displaying information by combining a real image and a virtual image has been proposed. For example, the display device described in Patent Literature 1 includes a real image display unit disposed toward the driver, a virtual image display unit disposed toward the opposite side of the driver, and a real image display unit. A half mirror interposed between the virtual image display unit and transmitting the display light emitted from the real image display unit to the driver side and reflecting the display light emitted from the virtual image display unit to the driver side; Prepare. In this display device, the driver visually recognizes information displayed in a state where a real image transmitted through the half mirror and a virtual image reflected by the half mirror are arranged side by side.

JP 2014-55847 A

The above display device requires two display units, a real image display unit and a virtual image display unit, and is an expensive system. In addition, since it is necessary to arrange the virtual image display unit on the opposite side of the real image display unit with the half mirror interposed therebetween, it is difficult to reduce the size of the system.

The present invention has been made in order to solve the above-described problems, and provides an inexpensive and small-sized display device capable of displaying a real image and a virtual image with a single display. With the goal.

The invention described in the claims is a display device that displays an image toward an observer, displaying a first image in a first area of a display surface, and displaying a second image in a second area of the display surface. And a first surface that is disposed between the first area of the display surface and the observer, and on which light constituting the first image emitted from the first area is incident, An optical element having a second surface opposite to the first surface, and light constituting the second image emitted from the second region of the display surface, the second surface of the optical element. And the optical element transmits the light constituting the first image incident on the first surface toward the observer and is reflected by the reflection means. The light incident on the second surface is reflected toward the observer.

1 shows a configuration of a display device according to a first embodiment. The example of the display image by a display apparatus is shown. The example which determined the information displayed with a real image and a virtual image according to driving speed is shown. The example of the display image at the time of low speed and middle speed is shown. The structure of the display apparatus which concerns on 2nd Example is shown. The structure of the display apparatus which concerns on 3rd Example is shown. The structure of the display apparatus which concerns on the 4th, 5th Example is shown. The structure of the display apparatus which concerns on 6th Example is shown.

In a preferred embodiment of the present invention, a display device that displays an image toward an observer displays a first image in a first region of the display surface and displays a second image in the second region of the display surface. One display, a first surface that is disposed between the first region of the display surface and the observer, and on which light constituting the first image emitted from the first region is incident; An optical element having a second surface opposite to the first surface, and light constituting the second image emitted from the second region of the display surface is transmitted to the second surface of the optical element. Reflecting means for reflecting toward the viewer, and the optical element transmits the light constituting the first image incident on the first surface toward the observer and is reflected by the reflecting means. Light incident on the second surface is reflected toward the observer.

In the above display device, the light constituting the first image displayed in the first area of the display device passes through the optical element and reaches the observer. Thereby, the real image of the first image is visually recognized by the observer. On the other hand, the light constituting the second image displayed in the second area of the display is reflected by the reflecting means and further reflected by the second surface of the optical element to reach the observer. Thereby, the virtual image of the second image is visually recognized by the observer. As a result, the observer can visually recognize an image including the real image of the first image and the virtual image of the second image. Since a real image and an image can be displayed by one display device, an inexpensive and small display device can be provided.

In one aspect of the above display device, the display unit emits circularly polarized light in a first rotation direction as light constituting the first image and the second image, and the reflecting means constitutes the second image. By reflecting the circularly polarized light in the first rotation direction that is the light to be transmitted, the light constituting the second image becomes circularly polarized light in the second rotation direction that is the rotation direction opposite to the first rotation direction. Inverted, the optical element transmits the circularly polarized light in the first rotation direction incident on the first surface toward the observer, and the second rotation direction circle incident on the second surface. The polarized light is reflected toward the observer. In a preferred example in this case, the optical element includes a cholesteric liquid crystal.

In another aspect of the above display device, the display unit emits linearly polarized light in a first direction as light constituting the first image, and the first direction as light constituting the second image. The linearly polarized light in the second direction orthogonal to each other is emitted, and the reflecting means reflects the linearly polarized light in the second direction, which is light constituting the second image, without changing the polarization direction. The linearly polarized light in the first direction incident on the first surface is transmitted toward the observer, and the linearly polarized light in the second direction incident on the second surface is reflected toward the observer. . In a preferred example in this case, the optical means includes a polarizing beam splitter.

In another aspect of the above display device, the display device is mounted on a vehicle, and acquires vehicle information acquisition means for acquiring information about the mounted vehicle, and information about navigation including traffic information and a route to the destination. The navigation information acquisition means displays the information related to the vehicle as one of the first image and the second image, and displays the information related to the navigation as the other of the first image or the second image. A display control unit for controlling the device. In this aspect, one of the information about the vehicle and the navigation information is displayed as a first image as a real image, and the other is displayed as a second image as a virtual image.

In another aspect of the above display device, the display device is mounted on a vehicle, speed acquisition means for acquiring a travel speed of the mounted vehicle, and the first image and the display on the display according to the travel speed. A display control unit that determines combinations of information to be displayed as the second images. In this aspect, the contents of the first image displayed as a real image and the second image displayed as a virtual image are appropriately determined according to the speed of the vehicle.

In another embodiment of the present invention, the display method executed by the display device includes displaying the first image in the first area and displaying the second image in the second area. It has a display control process to control. Thereby, the observer can visually recognize the image including the real image of the first image and the virtual image of the second image.

In another embodiment of the present invention, the display program executed by the display device displays the first image in the first region and the display unit to display the second image in the second region. The display device is caused to function as display control means for controlling. Thereby, the observer can visually recognize the image including the real image of the first image and the virtual image of the second image.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[First embodiment]
FIG. 1 shows a configuration of a display device 1 according to the first embodiment. In the present embodiment, it is assumed that the display device 1 is provided on an instrument panel in a driver's seat of a vehicle. As shown to FIG. 1 (A), the display apparatus 1 makes the driver | operator X as an observer visually recognize the display image containing a real image and a virtual image, the display 10, the mirror 20, and a combiner. 30, a shielding member 40, and a display control unit 50.

The display 10 displays an image on its display surface, and a liquid crystal display is used in this embodiment. The display 10 has R (red), G (green), and B (blue) light emitting pixels, and can display a full-color image. In addition to the liquid crystal display, an organic EL display, a rear projector, or the like can be used as the display device 10. When the rear projector is used, the screen on which the image is projected corresponds to the display surface of the display 10.

FIG. 1B is a view of the display device 10 as viewed from the driver X side. The display 10 has a first area 10a on the upper side of the display portion and a second area 10b on the lower side. The first area is an area for displaying a first image corresponding to the real image visually recognized by the driver X, and the second area is an area for displaying a second image corresponding to the virtual image visually recognized by the driver X. The first image displayed in the first area of the display 10 and the second image displayed in the second area are controlled by the display control unit 50.

A quarter wavelength plate (λ / 4 plate) 11 is provided on the display surface of the display 10. Linearly polarized light is emitted from the display surface of a normal liquid crystal display. However, by providing the quarter-wave plate 11, the linearly polarized light emitted from the display surface is circularly polarized light (hereinafter referred to as “the left polarization direction”). Called “left-handed circularly polarized light”).

A mirror 20 is arranged on the driver X side of the display 10. More specifically, the mirror 20 is disposed at a position substantially opposite to the second region of the display 10. The mirror 20 reflects the light constituting the second image displayed in the second region and causes the light to enter the combiner 30 from the driver X side.

Further, a combiner 30 is arranged on the driver X side of the display device 10, that is, between the display device 10 and the driver X. The combiner 30 is made of a transparent material such as glass or plastic. The combiner 30 transmits the light constituting the first image incident from the back side (that is, the display 10 side) and the light constituting the second image incident from the front side (that is, the driver X side). Is reflected to superimpose the second image on the first image. The combiner 30 is arrange | positioned so that at least one part of the 1st area | region of the indicator 10 may be covered seeing from the driver | operator X side. In other words, the combiner 30 may cover the entire first area of the display 10 or may cover only the area of the first area where the virtual image is to be superimposed. The combiner 30 typically has a concave reflecting surface that is recessed on the front side, thereby enlarging the second image and forming the second image as a virtual image in the distance. The surface on the display 10 side of the combiner 30 corresponds to the first surface of the present invention, and the surface on the driver X side corresponds to the second surface.

A selective reflection mirror 31 is provided on the surface of the combiner 30 on the driver X side. The selective reflection mirror 31 is an optical element that selectively reflects only light satisfying a predetermined condition in order to efficiently transmit and reflect light constituting an image. Specifically, the selective reflection mirror 31 is formed on the surface of the base material of the combiner 30 and has a property of selectively reflecting right-handed circularly polarized light.

A typical example of the selective reflection mirror 31 is a cholesteric liquid crystal. The cholesteric liquid crystal is formed by a plurality of layers in which rod-like molecules are arranged in a certain direction in each layer, and the plurality of layers are integrated so that the arrangement direction of the rod-like molecules changes spirally. A cholesteric liquid crystal has a property of selectively reflecting circularly polarized light having a wavelength equal to the spiral pitch and having the same rotation direction as the spiral rotation direction. In this embodiment, since the display unit 10 displays a full-color image, three layers of cholesteric liquid crystal having an arrangement pitch equal to each wavelength of RGB may be formed on the concave surface of the combiner 30 as the selective reflection mirror 31.

The shielding member 40 is disposed between the display 10 and the driver X, and serves to prevent the driver X from directly viewing the second image displayed in the second area of the display 10, in other words, the first. It has a role of blocking light constituting the two images from reaching the driver X directly. In addition, although the shielding member 40 is comprised, for example with a shielding board etc., there is no restriction | limiting in particular in the material, a magnitude | size, a shape, etc.

The display control unit 50 determines the first image and the second image to be displayed on the display 10, supplies the data of the first image and the second image to the display 10, and stores them in the first area and the second area, respectively. Display. The control by the display control unit 50 will be described later.

In the above configuration, the mirror 20 is an example of the reflecting means of the present invention, and the combiner 30 is an example of the optical element of the present invention. The display control unit 50 is an example of vehicle information acquisition means, navigation information acquisition means, speed acquisition means, and display control means of the present invention.

Next, image display by the display device 1 will be described with reference to FIG. As described above, the ¼ wavelength plate 11 is provided on the display surface of the display 10, and light emitted from the display surface is left circularly polarized light. The light (left circularly polarized light) constituting the first image emitted from the first area of the display device 10 passes through the combiner 10 and reaches the driver X. Thus, the driver X visually recognizes the first image displayed in the first area of the display 10 as a real image.

On the other hand, the light (left circularly polarized light) L1 constituting the second image emitted from the second region of the display 10 is reflected by the mirror 20. The mirror 20 is a total reflection mirror, and the left circularly polarized light L <b> 1 is reversed in the rotation direction when reflected by the mirror 20 and becomes right circularly polarized light. That is, the left circularly polarized light L1 constituting the second image is reflected by the mirror 20 and enters the combiner 30 as right circularly polarized light L2. Since the selective reflection mirror 31 provided in the combiner 30 selectively reflects only the right circularly polarized light, the right circularly polarized light L2 constituting the second image is reflected by the selective reflective mirror 31 and becomes the light L3. To. Thus, the driver X visually recognizes the virtual image VI of the second image behind the display device 10. As a result, the driver X visually recognizes an image in which the virtual image of the second image is superimposed on the real image of the first image.

In the above example, one total reflection mirror 20 is used. Instead, an odd number of mirrors may be arranged so that the light L1 is incident on the combiner 30 after an odd number of reflections. The left circularly polarized light L1 is finally converted into right circularly polarized light by an odd number of reflections, and is reflected in the direction of the driver X by the selective reflection mirror 31 which is a part of the combiner 30. In this way, since the optical path length becomes long, it is possible to display the virtual image VI farther from the driver X.

In the above example, the display 10 emits the left circularly polarized light, and the selective reflection mirror 31 of the combiner 30 selectively reflects only the right circularly polarized light. 10 may emit right circularly polarized light, and the selective reflection mirror 31 may selectively reflect only left circularly polarized light.

Furthermore, in the above example, the combiner 30 has a concave shape, but the combiner 30 may have a planar shape.

Next, a display example by the display device 1 will be described. FIG. 2 shows an example of a display image by the display device 1, that is, an example of an image visually recognized by the driver X. The image displayed on the display 10 of the display device 1 is determined and displayed under the control of the display control unit 50. The driver X visually recognizes an image including a real image and a virtual image at the position of the first region 10 a of the display 10 through the combiner 30. In the example of FIG. 2, the first image displayed in the first region of the display 10 includes a tachometer 71, a shift position 72, a fuel gauge 73, and a traveling speed 74, which are the real images of the driver X Visible to. Moreover, the 2nd image displayed on the 2nd area | region of the indicator 10 contains the driving speed 80, and this is visually recognized by the driver | operator X as a virtual image. As a result, an image obtained by superimposing the virtual image of the second image on the real image of the first image is visually recognized by the driver X.

From the viewpoint of the driver, the virtual image is displayed farther than the real image. Therefore, when the driver X focuses the eyes on the virtual image, the real image becomes blurred and the real image is difficult to visually recognize as an image. Become. Conversely, when the driver X focuses the eyes on the real image, the virtual image is blurred and difficult to visually recognize. For this reason, even if the real image and the virtual image are superimposed and displayed as shown in FIG. 2, the driver can distinguish both by focusing the eyes. For example, consider a case where the driver wants to check the traveling speed. If it is immediately after looking at the front landscape, it is easier for the driver to adjust the focus of the eyes by focusing on the virtual image. On the other hand, if it is immediately after operating while visually observing the apparatus in the vehicle, it is easier for the driver to adjust the focus of the eyes when focusing on the real image.

In the example of FIG. 2, the display control unit 50 displays the traveling speed as both a real image and a virtual image, but other information may be displayed as both a real image and a virtual image. For example, a warning light, engine speed, fuel remaining amount, drive position, time, and the like may be displayed as both a real image and a virtual image.

Further, the display control unit 50 may display different types of information by assigning them to real images and virtual images. For example, information related to the vehicle (travel speed, engine speed, remaining fuel amount, etc.) is displayed as a real image, and information related to navigation (traffic information, destination, route to destination, route direction, lane) acquired from the navigation device Decrease, fallen objects, etc.) may be displayed as virtual images. At this time, as shown in FIG. 2, the real image and the virtual image may be displayed so as to overlap each other. While viewing the same direction, the driver can visually recognize information related to navigation by focusing the eyes far away, and can visually recognize information related to the vehicle by focusing the eyes on the vicinity. As shown in FIG. 2, if navigation-related information is displayed in a large size superimposed on the vehicle-related information, the driver can easily visually recognize the navigation-related information even when the vehicle-related information is displayed. Can do. Instead of this, information about the vehicle may be displayed as a virtual image, and navigation information may be displayed as a real image.

Furthermore, the display control unit 50 may change the combination of information displayed as a real image and a virtual image according to the traveling speed of the vehicle on which the display device 1 is mounted. Specifically, when the traveling speed is faster than the predetermined speed, the driver's eyes are often in the distance, so the information displayed as a virtual image is increased, and when the traveling speed is slower than the predetermined speed, the virtual image is displayed. Information to be displayed may be reduced. The display control unit 50 may acquire the traveling speed from the vehicle or a navigation device mounted on the vehicle. FIG. 3 shows an example in which information to be displayed as a real image and information to be displayed as a virtual image are determined according to the traveling speed.

FIG. 4 shows an example in which information displayed as a real image and a virtual image is changed according to the traveling speed. FIG. 4A is an example of a display image at a low speed, and a speedometer, a shift position, a fuel gauge, a traveling speed, and the like are displayed as real images as in FIG. Further, a distance 81 to the next guidance point on the set route and a traveling direction 82 at the next guidance point are displayed as virtual images.

On the other hand, FIG. 4B is an example of a display image at medium speed. The image displayed as a real image is the same as that at low speed, but the traveling speed 83 is displayed as a virtual image in addition to the distance 81 to the next guide point on the set route and the traveling direction 82 at the next guide point. ing.

Further, the display control unit 50 may change the size of information displayed as a virtual image according to the traveling speed. Specifically, the information displayed as a virtual image may be displayed larger in order to improve the visibility by the driver as the traveling speed increases. In the example of FIGS. 4A and 4B, the distance 81 to the next guide point and the traveling direction 82 at the next guide point are displayed larger at the medium speed than at the low speed.

Further, when displaying the same information for the real image and the virtual image, the display control unit 50 may display the information displayed as the virtual image larger than the information displayed as the real image. When the driver is looking far away, the focus of the eyes is far away, so it is easier to focus the eyes by increasing the size of the virtual image. Specifically, in the example of FIG. 4B, the traveling speed is displayed as both a real image and a virtual image, but the traveling speed displayed as a virtual image is set larger than the traveling speed displayed as a real image. Yes.

Further, when displaying the same information for the real image and the virtual image, the display control unit 50 may display the information so as to overlap each other. Specifically, as shown in FIG. 4B, display is performed such that the traveling speed of the real image and the traveling speed of the virtual image overlap. In this way, the driver has a viewpoint in the area where the traveling speed is displayed, and according to the focal position of the eye at that time, it is only necessary to focus on the real image and the virtual image that are easy to focus, The focus adjustment of the driver's eyes becomes easy.

[Second Embodiment]
FIG. 5 shows a configuration of a display device 1A according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the component similar to 1st Example, and the overlapping description is abbreviate | omitted. For the sake of convenience, the display control unit 50 is not shown.

The display device 1A of the second embodiment is different from the first embodiment in that a polarizing element 32 is provided in the combiner 30 instead of the selective reflection mirror 31. The polarizing element 32 is, for example, a polarizing beam splitter (PBS), transmits linearly polarized light whose electric field vibration direction is the first direction, and is a straight line whose electric field vibration direction is a second direction orthogonal to the first direction. An optical element that reflects polarized light.

In the second embodiment, the light emitted from the first area of the display surface of the display device 10 is linearly polarized light whose electric field oscillation direction is vertical (hereinafter referred to as “vertically polarized light”), and from the second area. The emitted light is configured to be linearly polarized light whose electric field oscillation direction is horizontal (hereinafter referred to as “horizontal polarized light”). As a method of giving the liquid crystal display constituting the display 10 two kinds of polarization directions, for example, if the liquid crystal display emits vertically polarized light, a half-wave plate (λ / 2 plate) is provided only in the second region. ) 12 may be laminated. In this embodiment, the mirror 20 is an example of the reflecting means of the present invention, and the combiner 30 is an example of the optical element of the present invention.

In the second embodiment, the light constituting the first image emitted from the first region of the display device 10 is vertically polarized light and passes through the combiner 30 and the polarizing element 32 to reach the driver X. On the other hand, the light L1 constituting the second image emitted from the second region of the display 10 is horizontally polarized light, is reflected by the mirror 20, and enters the polarizing element 32 as light L2. In the present embodiment, the polarizing element 32 has a property of transmitting vertically polarized light and reflecting horizontally polarized light. Therefore, the horizontally polarized light L2 is reflected by the polarizing element 32 and reaches the driver X as light L3. As a result, the driver X visually recognizes an image in which the real image of the first image and the virtual image of the second image are superimposed.

In the above example, the light emitted from the first region is vertically polarized light, and the light emitted from the second region is horizontal polarized light, but these may be reversed. In that case, the polarizing element 32 may reflect vertical polarized light and transmit horizontal polarized light.

In the above example, the combiner 30 has a concave shape, but the combiner 30 may have a planar shape.

[Third embodiment]
Instead of the combiner 30 of the first embodiment, the combiner may be a concave half mirror, a Fresnel half mirror, a reflection hologram, or the like. In this case, the polarization direction of the light emitted from the first region and the second region may be arbitrary. Therefore, in any case, by giving the combiner the same characteristics as the concave mirror, the second image can be enlarged and displayed as a virtual image VI in the distance. With this configuration, the transmission and reflection efficiency of light constituting an image is lower than that of the first embodiment, but the display device can be made cheaper.

FIG. 6A shows a configuration using a Fresnel half mirror 33 as the display device 1B according to the third embodiment. In the present embodiment, the display 10 is not provided with the quarter wavelength plate 11. In addition, the same code | symbol is attached | subjected to the component similar to 1st Example, and the overlapping description is abbreviate | omitted. For the sake of convenience, the display control unit 50 is not shown. In this embodiment, the mirror 20 is an example of the reflecting means of the present invention, and the Fresnel half mirror 33 is an example of the optical element of the present invention.

In the third embodiment, the light constituting the first image emitted from the first region of the display 10 passes through the Fresnel half mirror 33 and reaches the driver X. On the other hand, the light L1 constituting the second image emitted from the second region of the display device 10 is reflected by the mirror 20, enters the Fresnel half mirror 33 as the light L2, and is further reflected by the Fresnel half mirror 33 to generate the light L3. To driver X. As a result, the driver X visually recognizes an image in which the real image of the first image and the virtual image of the second image are superimposed.

In the third embodiment, since the driver X views the first image through the Fresnel half mirror 33, the image is deformed by the Fresnel structure. Therefore, an image deformed in advance so as to correct the influence needs to be the first image. That is, the display control unit 50 uses, as the first image, an image that has been deformed in advance so that it can be correctly viewed when viewed through the Fresnel half mirror 33.

Further, instead of deforming the first image in advance, as shown in FIG. 6B, the Fresnel half mirror 33 is coated with a resin 34 having a refractive index close to that of the material of the Fresnel half mirror 33. Also good. This also removes the influence of the Fresnel structure on the first image.

[Fourth embodiment]
FIG. 7A shows the configuration of a display device 1D according to the fourth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the component similar to 1st Example, and the overlapping description is abbreviate | omitted. For the sake of convenience, the display control unit 50 is not shown.

In the first embodiment, the mirror 20 has a planar shape and the combiner 30 has a concave shape. Instead, in the fourth embodiment, the mirror 21 is a concave mirror and the combiner 35 is a planar shape. Similar to the first embodiment, the combiner 35 is provided with a selective reflection mirror 36 on the surface on the driver X side. The selective reflection mirror 36 transmits left circularly polarized light and reflects right circularly polarized light. In this embodiment, the mirror 21 is an example of the reflecting means of the present invention, and the combiner 35 is an example of the optical element of the present invention.

In the fourth embodiment, the left circularly polarized light constituting the first image emitted from the first region of the display device 10 passes through the combiner 35 and the selective reflection mirror 36 and reaches the driver X. On the other hand, the left circularly polarized light L1 constituting the second image emitted from the second region of the display device 10 is reflected by the concave mirror 21 to become right circularly polarized light L2, reflected by the selective reflection mirror 36, and the light L3. As a driver. As a result, the driver X visually recognizes an image in which the real image of the first image and the virtual image of the second image are superimposed.

[Fifth embodiment]
FIG. 7B shows a configuration of a display device 1E according to the fifth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the component similar to 1st Example, and the overlapping description is abbreviate | omitted. For the sake of convenience, the display control unit 50 is not shown.

In the fifth embodiment, the combiner 35 has a planar shape as in the fourth embodiment. In addition, the mirror is a planar half mirror 22, and the half mirror 22 extends so as to cover the first region of the display 10. The half mirror 22 reflects the light constituting the second image emitted from the second region of the display 10 toward the combiner 35. In this embodiment, the half mirror 22 is an example of the reflecting means of the present invention, and the combiner 35 is an example of the optical element of the present invention.

In the fifth embodiment, the left circularly polarized light constituting the first image emitted from the first region of the display device 10 passes through the combiner 35 and the selective reflection mirror 36 and reaches the driver X. On the other hand, the left circularly polarized light L1 that is emitted from the second region of the display 10 and constitutes the second image is reflected by the half mirror 22 to become right circularly polarized light L2, and further reflected by the selective reflection mirror 36. And reaches the driver as light L3. As a result, the driver X visually recognizes an image in which the real image of the first image and the virtual image of the second image are superimposed. In the present embodiment, since the entire display surface of the display 10 is covered with the half mirror 22, the display image can be provided with a seamless display and an excellent design.

[Sixth embodiment]
FIG. 8 shows a configuration of a display device 1F according to the sixth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the component similar to 1st Example, and the overlapping description is abbreviate | omitted. For the sake of convenience, the display control unit 50 is not shown.

In the first embodiment, the selective reflection mirror 31 is placed on the combiner 30. Instead, in the sixth embodiment, the combiner 30 is removed, and the selective reflection mirror 37 is disposed so as to overlap the first region of the display 10. The selective reflection mirror 37 transmits left circularly polarized light and reflects right circularly polarized light. Thereby, the depth of the whole display apparatus 1F can be made small.

Further, instead of the mirror 20 of the first embodiment, a concave half mirror 23 is arranged so as to cover the first region when viewed from the driver X. That is, the half mirror 23 is disposed so that the concave surface thereof faces the display 10 side. By making the half mirror 23 concave, the second image can be enlarged and displayed as a virtual image in the distance. In the present embodiment, the half mirror 23 is an example of the reflecting means of the present invention, and the selective reflection mirror 37 is an example of the optical element of the present invention.

In the sixth embodiment, the left circularly polarized light constituting the first image emitted from the first region of the display device 10 passes through the selective reflection mirror 37 and reaches the driver X. On the other hand, the left circularly polarized light L1 that is emitted from the second region of the display 10 and constitutes the second image is reflected by the half mirror 23 to become right circularly polarized light L2, and is reflected by the selective reflection mirror 37. It reaches the driver as light L3. As a result, the driver X visually recognizes an image in which the real image of the first image and the virtual image of the second image are superimposed.

[Modification]
In each of the above embodiments, on the display surface of the display device 10, the first area for displaying the real image is arranged on the upper side and the second area for displaying the virtual image is arranged on the lower side.

The present invention can be used for various display devices such as game machines and home appliances in addition to the display devices provided on the instrument panel of the vehicle.

DESCRIPTION OF

SYMBOLS

1, 1A-1F Display apparatus 10 Display 20

Mirror

22, 23

Half mirror

30, 35

Combiner

31, 36, 37 Selective reflection mirror 32 Polarizing element 33 Fresnel half mirror 40 Shielding member 50 Display control part

Claims

A display device that displays an image to an observer,
One display for displaying a first image in a first region of the display surface and displaying a second image in the second region of the display surface;
A first surface, which is disposed between the first region of the display surface and the observer and is incident on the light constituting the first image emitted from the first region, is opposed to the first surface. An optical element having a second surface to be
Reflecting means for reflecting the light constituting the second image emitted from the second region of the display surface toward the second surface of the optical element;
The optical element transmits light constituting the first image incident on the first surface toward the observer, and reflects light incident on the second surface after being reflected by the reflecting means. A display device that reflects toward an observer.
The indicator emits circularly polarized light in a first rotation direction as light constituting the first image and the second image,
The reflection means reflects the circularly polarized light in the first rotation direction, which is light constituting the second image, so that the light constituting the second image has a rotation direction opposite to the first rotation direction. Invert to be circularly polarized in the second rotational direction,
The optical element transmits the circularly polarized light in the first rotational direction incident on the first surface toward the observer and the circularly polarized light in the second rotational direction incident on the second surface. The display device according to claim 1, wherein the display device reflects toward an observer.
The display device according to claim 2, wherein the optical element includes a cholesteric liquid crystal.
The indicator emits linearly polarized light in a first direction as light constituting the first image, and emits linearly polarized light in a second direction orthogonal to the first direction as light constituting the second image. ,
The reflecting means reflects the linearly polarized light in the second direction, which is light constituting the second image, without changing the polarization direction;
The optical element transmits the linearly polarized light in the first direction incident on the first surface toward the observer and the linearly polarized light in the second direction incident on the second surface on the observer. The display device according to claim 1, wherein the display device reflects toward the screen.
The display device according to claim 4, wherein the optical means includes a polarization beam splitter.
Mounted on the vehicle,
Vehicle information acquisition means for acquiring information about the vehicle to be mounted;
Navigation information acquisition means for acquiring information related to navigation including traffic information and a route to the destination;
Display control for controlling the display so that the information about the vehicle is displayed as one of the first image and the second image, and the information about the navigation is displayed as the other of the first image or the second image. And
The display device according to claim 1, further comprising:
Mounted on the vehicle,
Speed acquisition means for acquiring the traveling speed of the vehicle mounted;
A display control unit for determining a combination of information to be displayed as the first image and the second image on the display unit according to the traveling speed;
The display device according to claim 1, further comprising:
A display method executed by the display device according to any one of claims 1 to 5,
A display method comprising: a display control step of controlling the display so as to display a first image in the first area and display a second image in the second area.
A display program executed by the display device according to claim 1,
A display program for causing the display device to function as display control means for controlling the display so as to display a first image in the first area and to display a second image in the second area.