WO2012117496A1

WO2012117496A1 - Display device

Info

Publication number: WO2012117496A1
Application number: PCT/JP2011/054492
Authority: WO
Inventors: 柳澤　琢麿
Original assignee: パイオニア株式会社
Priority date: 2011-02-28
Filing date: 2011-02-28
Publication date: 2012-09-07

Abstract

This display device is provided with a light source, a reflecting member, and a half mirror. The light source emits light constituting a display image. The reflecting member reflects light transmitted through the half mirror onto the half mirror. The half mirror allows the light emitted from the light source to be transmitted and guides the light to the reflecting member, and again reflects the light reflected by the reflecting member.

Description

Display device

The present invention relates to a technique for displaying information.

Conventionally, there is a technique for visually displaying a display image of information related to driving of a vehicle as a virtual image from the position (eye point) of the driver. For example, Patent Document 1 discloses a display device that uses a retroreflective material as a screen and allows an observer (user) to observe an image from the convergence position of an optical path from a projection device that projects the screen. Yes.

JP 2008-04-0049 A

When a head-up display or the like reflects light with a half mirror such as a combiner to make an observer visually recognize an image, a curved mirror is generally used as the half mirror to enlarge the image. However, a large curved mirror is difficult to manufacture, and an image is easily distorted due to a shift in the installation position such as an inclination.

The present invention has been made in order to solve the above-described problems, and has as its main object to provide a display device capable of stably viewing an image.

The invention according to claim 1 is a light source part that emits light constituting a display image, a reflective member that reflects the light, and transmits the light emitted from the light source part to guide the light to the reflective member. And a half mirror that further reflects the light reflected by the reflecting member.

The invention according to claim 14 is a head-up display mounted on a vehicle, wherein a light source part that emits light constituting a display image, a reflecting member that reflects the light, and light emitted from the light source. And a half mirror that further guides the light reflected by the reflecting member and transmits the light to the reflecting member.

It is an example of schematic structure of the display apparatus in 1st Example. It is a schematic block diagram of the position adjustment part illustrated from the direction of arrow Y. (A) shows the state of the display device when the eye point exists in the forward direction of the vehicle from the standard position. (B) shows the state of the display device when the eye point exists in the rear direction of the vehicle from the standard position. It is an example of schematic structure of the display apparatus in 2nd Example. It is a schematic block diagram of the position adjustment part illustrated from the direction of arrow Y. (A) shows the state of the display device when the eye point exists in the forward direction of the vehicle from the standard position. (B) shows the state of the display device when the eye point exists in the rear direction of the vehicle from the standard position.

In one preferred embodiment of the present invention, a light source part that emits light constituting a display image, a reflecting member that reflects the light, and light emitted from the light source part is transmitted and guided to the reflecting member. And a half mirror that further reflects the light reflected by the reflecting member.

The display device includes a light source unit, a reflecting member, and a half mirror. The light source unit emits light constituting the display image. The reflecting member reflects the light transmitted through the half mirror to the half mirror. The half mirror transmits the light emitted from the light source unit and guides it to the reflecting member, and further reflects the light reflected by the reflecting member. By doing so, the display device can increase the size of the image visually recognized by the user even when the half mirror is a flat surface or a gently curved surface, and allows the user to visually recognize the image stably. It becomes.

In one aspect of the display device, the half mirror reflects light reflected by the reflecting member on a surface opposite to an incident surface of light emitted from the light source unit. Thereby, preferably, the half mirror can transmit the light emitted from the light source unit and guide it to the reflecting member, and can further reflect the light reflected by the reflecting member.

In another aspect of the display device, the reflective member is a retroreflective member. In this aspect, the display device causes the user to visually recognize an image by so-called Maxwell's view. According to this aspect, the display device can increase the light use efficiency and increase the degree of freedom of the installation angle between the light source unit and the reflection member. Furthermore, since the display device does not require a special screen or the like that scatters light, the display device can be configured at a low cost, and generation of speckle noise can be suppressed.

In one aspect of the display device, the reflecting member is disposed non-parallel to the half mirror.

In one aspect of the display device, the incident angle of the light transmitted through the half mirror to the reflecting member is smaller than the incident angle of the light emitted from the light source unit to the half mirror.

In one aspect of the display device, the half mirror reflects the light reflected by the reflecting member and guides it to the user's eyes.

In one aspect of the display device, the light source unit, the reflective member, and a housing that accommodates the half mirror are included, the reflective member is disposed on a ceiling portion of the front body, and the half mirror includes the light source unit. It arrange | positions on the optical path of the light radiate | emitted from. According to this aspect, the display device can use the fact that the reflecting member is a retroreflecting member, and can install the reflecting member in accordance with the shape of the plane of the ceiling portion, and can protrude from the ceiling portion. Can be suppressed.

In one aspect of the display device, a position adjusting unit that adjusts the position of the half mirror is provided. According to this aspect, the display device can adjust the position of the half mirror according to the position of the user's viewpoint, and can allow the user to visually recognize the virtual image appropriately.

In another aspect of the display device, the position adjusting unit adjusts the position of the half mirror so that a chief ray of light emitted from the light source unit passes through a central part of the half mirror. Here, the “center portion” is the center of the half mirror and the vicinity thereof, and refers to, for example, a range in which all the light emitted from the light source unit is irradiated to the half mirror. By doing in this way, the display apparatus can make a user visually recognize a virtual image, without a virtual image missing.

In another aspect of the display device, the position adjustment unit moves the half mirror substantially parallel to a direction in which the light source unit emits light. According to this aspect, even when the half mirror is moved, the display device can allow the user to visually recognize the virtual image without missing the virtual image.

In another aspect of the display device, the reflective member is a retroreflective member, and the position adjusting unit has a point where the light reflected from the half mirror converges and a user's viewpoint substantially match. Thus, the position of the combiner is adjusted. Thereby, even if it is a case where a user's viewpoint changes, a display apparatus can make a user visually recognize a virtual image by Maxwell vision.

In another aspect of the above display device, the half mirror is formed in a flat plate shape, and the position adjustment unit is configured such that the length of the optical path from the light source unit to the half mirror and the half mirror to the user's viewpoint. The position of the half mirror is adjusted so that the length of the optical path is equal. Thereby, even if it is a case where a user's viewpoint changes, a display apparatus can make a user visually recognize a virtual image by Maxwell vision.

In another aspect of the display device, the light source unit may change an angle at which the light is emitted, and the position adjusting unit may be configured such that the angle of the light reflected from the half mirror with respect to the horizontal direction is a predetermined angle. As described above, the position of the half mirror is adjusted, and the light source unit changes the angle at which the light is emitted so that the angle of the light reflected from the half mirror with respect to the horizontal direction becomes a predetermined angle. According to this aspect, the display device can always keep the angle of the line of sight when viewing the virtual image constant.

In another aspect of the display device, the half mirror has an oval shape. Thereby, the display apparatus can reduce a user's feeling of pressure by presence of a half mirror.

In another preferred embodiment of the present invention, the head-up display is mounted on a vehicle, and includes a light source unit that emits light constituting a display image, a reflective member that reflects the light, and a light source that is emitted from the light source. A half mirror that transmits the reflected light and guides it to the reflecting member, and further reflects the light reflected by the reflecting member.

The above head-up display is mounted on a vehicle and includes a light source unit, a reflecting member, and a half mirror. The light source unit emits light constituting the display image. The reflecting member reflects the light transmitted through the half mirror to the half mirror. The half mirror transmits the light emitted from the light source unit and guides it to the reflecting member, and further reflects the light reflected by the reflecting member. By doing so, the head-up display can increase the size of the image visually recognized by the user even when the half mirror is a flat surface or a gently curved surface, and allows the user to visually recognize the image stably. It becomes possible.

In one aspect of the head-up display, the light source unit is installed on a dashboard, the half mirror is attached to a sun visor, and the reflecting member is installed on a ceiling of a vehicle compartment. According to this aspect, the display device can allow the user to visually recognize a virtual image.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings in first and second embodiments.
<First embodiment>
(Outline configuration)
FIG. 1 shows a configuration of a display device 100 as an example of the display device and head-up display of the present invention. The display device 100 is mounted on a vehicle which is an example of the “casing” of the present invention, and includes a light source unit 2, a combiner 3, a reflecting member 5, and a position adjusting unit 6. In FIG. 1, a line “L1” indicates a principal ray of incident light from the light source unit 2 to the combiner 3, and a line “L2” indicates a principal ray of light reflected by the combiner 3. “L3” indicates a principal ray of light incident on the reflecting member 5 from the combiner 3 and a principal ray of light reflected by the reflecting member 5, and a line “L4” indicates the viewpoint of the driver from the combiner 3 ( This is also referred to as “eye point Pe”). In FIG. 1, the boundary of light having the lines L1, L3, and L4 as principal rays is indicated by a one-dot chain line.

The light source unit 2 is installed on the dashboard 44 of the vehicle and irradiates the combiner 3 with a display image indicating map information including the current location, route guidance information, traveling speed, and other information for assisting driving. Specifically, the light source unit 2 emits light to the combiner 3, thereby extending the driver's eye position (also referred to as “eye point Pe”) to the combiner 3, that is, on the line L 2 or its Generate a virtual image on the extension line.

The combiner 3 is an optical element as an example of a “half mirror” in the present invention formed in a flat plate shape, and is installed in the vicinity of a sun visor (not shown), that is, substantially vertically above the handle portion 42. The combiner 3 transmits a part of the emitted light and specularly reflects the other part. Specifically, the combiner 3 converts light having the line L1 emitted from the light source unit 2 into chief rays into reflected light having the line L2 as chief rays and transmitted light having the line L3 as chief rays. To divide. Further, the combiner 3 reflects a part of the reflected light whose principal ray is the line L 3 where the above-mentioned transmitted light is reflected by the reflecting member 5 on the surface opposite to the incident surface of the light emitted from the light source unit 2. To do. Thereby, the reflected light having the line L4 as the principal ray is incident on the eye point Pe. Further, as will be described later, the combiner 3 is configured so that the principal ray L1 of the light emitted from the light source unit 2 passes through the central portion of the combiner 3, and the lines L1 and L4 have substantially the same length. The position is adjusted by the position adjustment unit 6.

The reflecting member 5 is attached to the ceiling portion 41 according to the shape of the ceiling portion 41 in the vehicle interior. The reflection member 5 retroreflects incident light. That is, the reflecting member 5 reflects incident light in the incident direction. Therefore, in the present embodiment, the reflecting member 5 reflects the incident light having the line L3 transmitted through the combiner 3 and entering as the principal ray to the combiner 3 again. Then, the reflected light from the reflecting member 5 to the combiner 3 follows the same optical path as the incident light from the combiner 3 to the reflecting member 5. As a result, the reflected light again enters the combiner 3 while converging, and a part of the reflected light is reflected toward the eye point Pe. The point where the light reflected from the combiner 3 converges to one point (also simply referred to as “convergence point”) is set so as to substantially coincide with the position of the eye point Pe. This allows the user to focus the light once at the center of the pupil and then project it onto the retina and observe the image by Maxwell's view. It becomes possible to observe.

The position adjustment unit 6 is fixed to the ceiling 41 and adjusts the position of the combiner 3. Specifically, the position adjustment unit 6 includes a guide rail 61 that extends substantially parallel to the emission direction of the light source unit 2, a fixing unit 62 that fixes the guide rail 61 to the ceiling 41, and a frame that supports the combiner 3. Unit 63.

Here, a specific configuration example of the position adjustment unit 6 will be further described with reference to FIG. FIG. 2 is a schematic configuration diagram of the position adjusting unit 6 illustrated from the direction of the arrow “Y” in FIG. 1. As shown in FIG. 2, the combiner 3 is supported by the

rotation support parts

631 and 632 of the frame part 63 so as to be rotatable in the directions of the arrows “Y1” and “Y2”. Thereby, the combiner 3 is installed at an arbitrary angle of inclination (also referred to as “rotation angle”) in the direction of the arrow Y1 or the arrow Y2. The frame portion 63 includes a slide portion 630 whose movement is restricted by the guide rail 61. The slide part 630 moves in the extending direction of the guide rail 61, that is, in the directions of the arrows “Y3” and “Y4”. As will be described later, the adjustment of the position of the slide portion 630 and the rotation angle of the combiner 3 may be performed manually or automatically.

(Combiner position adjustment)
Next, the position of the combiner 3 will be described in detail.

The combiner 3 is installed at a position where the convergence point of the light reflected from the combiner 3 and the position of the eye point Pe substantially coincide. Specifically, the position where the line L1 and the line L4 are substantially the same length, that is, the length of the optical path from the light source unit 2 to the combiner 3, and the length of the optical path from the combiner 3 to the eye point Pe are substantially the same. It will be installed at the position. Further, the rotation angle of the combiner 3 is adjusted in the direction of the arrow Y2 so that the eye point Pe exists on the line L4.

Further, the combiner 3 is installed at a position where a part of the virtual image is not missing, specifically, a position where the principal ray L1 of the light emitted from the light source unit 2 passes through the central part of the combiner 3. Here, the “center portion” refers to the center of the combiner 3 and the vicinity thereof, and specifically refers to a range in which all the light emitted from the light source unit 2 is irradiated to the combiner 3.

Considering the above, the combiner 3 is a position where the line L1 and the line L4 are substantially the same length, the position where the line L4 passes through the eye point Pe, and the position where the line L1 passes through the center of the combiner 3 In addition, the position needs to be adjusted. Hereinafter, this specific example will be described with reference to FIGS. 3 (a) and 3 (b). In the following, the position of the eye point Pe and the position of the combiner 3 shown in FIG.

FIG. 3A shows the state of the display device 100 when the eye point Pe exists in the forward direction of the vehicle from the standard position. In FIG. 3A, for convenience of explanation, the eye point Pe and the combiner 3 corresponding to the standard position are indicated by broken lines.

As shown in FIG. 3A, the combiner 3 and the frame portion 63 are arranged so that the line L1 and the line L4 have substantially the same length when the eye point Pe is shifted in the vehicle front direction from the standard position. Then, it moves along the guide rail 61 in the direction of the arrow Y3. Further, the rotation angle of the combiner 3 is adjusted in the direction of the arrow Y2 so that the eye point Pe exists on the line L4. Thereby, the display apparatus 100 can make the convergence point of the light reflected from the combiner 3 and the position of the eye point Pe coincide.

Moreover, the combiner 3 and the frame part 63 move along the guide rail 61 formed substantially parallel to the emission direction from the light source part 2. Therefore, as shown in FIG. 3A, the principal ray corresponding to the line L 1 passes through the approximate center of the combiner 3 even after the combiner 3 and the frame portion 63 are moved. Thereby, the display apparatus 100 can suppress that a part of virtual image is missing and is visually recognized by the user.

FIG. 3B shows a state of the display device 100 when the eye point Pe exists in the rear direction of the vehicle with respect to the standard position. In FIG. 3B, as in FIG. 3A, the eye point Pe and the combiner 3 corresponding to the standard position are indicated by broken lines for convenience of explanation.

As shown in FIG. 3B, the combiner 3 and the frame portion 63 are arranged so that the line L1 and the line L4 have substantially the same length when the eye point Pe is deviated from the standard position in the rearward direction of the vehicle. Then, it moves along the guide rail 61 in the direction of the arrow Y4. Further, the rotation angle of the combiner 3 is adjusted in the direction of the arrow Y1 so that the eye point Pe exists on the line L4. Thereby, the display apparatus 100 can make the convergence point of the light reflected from the combiner 3 and the position of the eye point Pe coincide.

Moreover, the combiner 3 and the frame part 63 move along the guide rail 61 formed substantially parallel to the emission direction from the light source part 2. Therefore, as shown in FIG. 3B, the principal ray L 1 of the light emitted from the light source unit 2 passes through the approximate center of the combiner 3 even after the combiner 3 and the frame unit 63 are moved. Thereby, it can suppress that a part of virtual image is missing and is visually recognized.

As described above, the display device 100 can move the combiner 3 to an appropriate position by the position adjusting unit 6 even when the eye point Pe is shifted from the standard position.

Note that, as described above, the position adjusting unit 6 can adjust the position of the combiner 3 in accordance with the position of the eye point Pe in either of the automatic and manual cases.

Here, an example in which the position adjustment of the combiner 3 is partially performed automatically will be described. In this case, the display device 100 includes, for example, a first drive unit such as an actuator that moves the frame unit 63 to the position adjustment unit 6, and a second drive unit such as a motor that displaces the combiner 3 at an arbitrary rotation angle. And an interface unit for a user to operate. When there is an input to the interface unit, a control signal is transmitted from the interface unit to the first drive unit or the second drive unit, and the first drive unit moves the frame 63 to the arrow Y3 or the arrow Y4 based on the control signal. The second drive unit changes the rotation angle of the combiner 3 based on the control signal.

Next, an example in which the position adjustment of the combiner 3 is automatically performed regardless of the operation will be described. In this case, for example, the display device 100 further includes a detection unit such as a camera that detects the position of the eye point Pe in addition to the first driving unit and the second driving unit described above, and based on the position of the eye point Pe, The frame unit 63 is moved on the guide rail 61 by one drive unit, and the rotation angle of the combiner 3 is adjusted by the second drive unit. At this time, the first driving unit and the second driving unit refer to, for example, a predetermined map or the like to determine the target position of the frame 63 and the rotation angle of the combiner 3 from the detected position of the eye point Pe. Determine. The above-described map is a map of the position of each assumed eye point Pe, the position of the frame portion 63 to be set corresponding to the position of the eye point Pe, and the rotation angle of the combiner 3, for example, an experiment or the like. Is created in advance.

As described above, the position adjustment unit 6 can preferably adjust the position of the combiner 3 in accordance with the position of the eye point Pe, whether it is automatic or manual.

(effect)
Here, the structural advantages of the display device 100 other than those described above will be described.

As shown in FIG. 1, the light source unit 2 is installed on the dashboard 44, and the combiner 3 is installed in the vicinity of the sun visor. Therefore, the display device 100 can be mounted on various vehicles.

The reflecting member 5 reflects in the same direction regardless of the incident angle “d2” (see FIG. 1) of the light transmitted through the combiner 3. Therefore, regardless of the light emission direction of the light source unit 2, the reflecting member 5 is freely installed in a range where the light reaches. That is, in the first embodiment, the degree of freedom of the installation angle between the light source unit 2 and the reflecting member 5 is high. Therefore, in FIG. 1, the reflecting member 5 is installed along the ceiling portion 41 without forming a protrusion. Further, the reflecting member 5 is installed non-parallel to the combiner 3, and the incident angle d 2 described above is smaller than the incident angle “d 1” (see FIG. 1) to the combiner 3 emitted from the light source unit 2. Note that, when the reflecting member 5 is installed along the shape of the ceiling portion 41, the virtual image is not distorted even if the reflecting member 5 that is a retroreflecting member is distorted.

Further, by making the user visually recognize the virtual image via the reflecting member 5, the virtual image visually recognized by the user can be enlarged even if the combiner 3 is planar.

In addition, the display device 100 does not require a special screen or the like that scatters light, so that it can be configured at a low cost and can suppress the generation of speckle noise. Further, the display device 100 does not generate an intermediate image. Therefore, the image emitted from the light source unit 2 is visible only to the driver and is not visually recognized by people outside the vehicle.
<Second embodiment>
Next, a second embodiment will be described. The second embodiment differs from the first embodiment in that, in addition to the first embodiment, the angle at which the user looks up the virtual image can always be kept constant.

(Outline configuration)
FIG. 4 shows a schematic configuration of a display device 100x according to the second embodiment. The light source unit 2x of the display device 100x changes the light emission direction by rotating in the direction of the arrow Y5 or the arrow Y6.

Further, the position adjusting unit 6x of the display device 100x includes a mechanism for moving the combiner 3 in the direction indicated by the arrows Y8 and Y9, which is the extending direction of the frame unit 63x. This will be further described with reference to FIG.

FIG. 5 is a schematic configuration diagram of the position adjusting unit 6x illustrated from the direction of the arrow “Y” in FIG. As shown in FIG. 5, the frame portion 63x includes

guide portions

634 and 635 that extend from the slide portion 630 and restrict the movement of the

rotation support portions

631 and 632 in the extending direction. Then, the

rotation support parts

631 and 632 can be translated in the directions of arrows Y7 and Y8, which are the extending directions of the

guide parts

634 and 635, and can be fixed at arbitrary positions. The combiner 3 moves in the directions of arrows Y7 and Y8 together with the

rotation support portions

631 and 632 in accordance with the movement of the

rotation support portions

631 and 632. As in the first embodiment, the slide portion 630 slides along the guide rail 61 in the directions of arrows Y3 and Y4. The combiner 3 rotates in the directions of arrows Y1 and Y2 with the

rotation support portions

631 and 632 as axes.

(Adjustment of combiner and light source)
Next, the position adjustment of the combiner 3 and the direction adjustment of the light source unit 2x associated with the position change of the eye point Pe will be described. The display device 100x always sets the angle of the line of sight relative to the horizontal direction when the user visually recognizes the virtual image (also referred to as “line of sight angle Θ”), that is, the angle formed by the light reflected from the combiner 3 with respect to the horizontal direction. It is possible to keep it at a predetermined angle. The predetermined angle is determined in advance based on, for example, experiments.

This will be described with reference to FIGS. 6 (a) and 6 (b). In the following, the position of the eye point Pe, the position of the combiner 3 and the position of the light source unit 2x shown in FIG.

FIG. 6A shows a state of the display device 100x when the eye point Pe is present in the forward direction of the vehicle from the standard position. In FIG. 6A, for convenience of explanation, the eye point Pe and the combiner 3 corresponding to the standard position are indicated by broken lines.

As shown in FIG. 6A, the combiner 3 and the frame portion 63x are arranged so that the line L1 and the line L4 have substantially the same length when the eye point Pe is shifted in the vehicle front direction from the standard position. Then, it moves along the guide rail 61 in the direction of the arrow Y3. Further, the rotation angle of the combiner 3 is adjusted in the direction of the arrow Y2 so that the eye point Pe exists on the line L4. Thereby, the convergence point of the light reflected from the combiner 3 and the position of the eye point Pe coincide.

In addition to this, the direction of the light source unit 2x is tilted in the direction of the arrow Y6 so that the line-of-sight angle Θ is kept constant. As a result, the intersection of the line L1 and the combiner 3 is shifted vertically upward, and the line-of-sight angle Θ in this case becomes equal to the line-of-sight angle Θ shown in FIG. Furthermore, the combiner 3 moves in the direction of the arrow Y8 from the standard position along the frame portion 63x so that the line L1 passes through the central portion of the combiner 3. Thereby, the display device 100x can suppress a part of the virtual image from being visually recognized.

FIG. 6B shows a state of the display device 100x when the eye point Pe exists in the rear direction of the vehicle with respect to the standard position. In FIG. 6B, for convenience of explanation, the eye point Pe and the combiner 3 corresponding to the standard position are indicated by broken lines.

As shown in FIG. 6 (b), the combiner 3 and the frame portion 63x are arranged so that the line L1 and the line L4 have substantially the same length when the eye point Pe is shifted in the rearward direction of the vehicle from the standard position. Then, it moves along the guide rail 61 in the direction of the arrow Y4. Further, the rotation angle of the combiner 3 is adjusted in the direction of the arrow Y1 so that the eye point Pe exists on the line L4. Thereby, the convergence point of the light reflected from the combiner 3 and the position of the eye point Pe can be matched.

In addition to this, the direction of the light source unit 2x is tilted in the direction of the arrow Y5 so that the line-of-sight angle Θ is kept constant. As a result, the intersection between the principal ray L1 and the combiner 3 becomes high, and the line-of-sight angle Θ in this case becomes equal to the line-of-sight angle Θ shown in FIG. Furthermore, the combiner 3 moves in the direction of the arrow Y7 from the standard position along the frame 63x so that the principal ray L1 of the light emitted from the light source unit 2 passes through the approximate center of the combiner 3. Thereby, the display device 100x can suppress a part of the virtual image from being visually recognized.

As described above, the display device 100x includes the position adjustment unit 6x that can move the combiner 3 along the frame unit 63x, and the light source unit 2x that can change the direction of light emission. Thereby, even if the position of the eye point Pe is changed, the display device 100x can make the user visually recognize the virtual image without missing a part of the virtual image while keeping the line-of-sight angle Θ constant.

Note that, as in the first embodiment, the position adjusting unit 6x can adjust the position of the combiner 3 in accordance with the position of the eye point Pe regardless of whether it is automatic or manual.

When the position adjustment of the combiner 3 is partly automatically performed, for example, the display device 100x includes a light source unit in the directions of arrows Y5 and Y6 in addition to the first drive unit and the second drive unit described in the first embodiment. A third drive unit that changes the orientation of 2x; and a fourth drive unit that moves the

rotation support units

631 and 632 in the directions of arrows Y7 and Y8. Based on the input to the interface unit, the first to fourth driving units are driven.

Next, when the position adjustment of the combiner 3 is automatically performed regardless of the operation, the display device 100x includes a detection unit such as a camera that detects the position of the eye point Pe in addition to the first drive unit to the fourth drive unit. In addition, the first drive unit to the fourth drive unit are driven based on the position of the eye point Pe. Specifically, the first drive unit to the fourth drive unit specify, for example, a predetermined map or the like from the detection position of the eye point Pe and specify the amount to be moved or rotated of the control target. Operates on quantity. The above-mentioned map is created in advance based on, for example, experiments.

As described above, the position adjustment unit 6x can preferably adjust the position of the combiner 3 and the inclination of the light source unit 2x in accordance with the position of the eye point Pe in either case of automatic or manual operation. .
<Modification>
Hereinafter, modified examples suitable for the first and second embodiments will be described. The following modifications may be applied to the first and second embodiments described above in any combination.

(Modification 1)
In the first embodiment and the second embodiment, the combiner 3 is formed in a flat plate shape, but the aspect to which the present invention is applicable is not limited to this. Instead of this, the combiner 3 may be formed in a gently curved shape.

Even in this case, the position of the combiner 3 is adjusted so that the convergence point of the light reflected from the combiner 3 and the position of the eye point Pe substantially coincide. At this time, the ratio between the length of the line L1 and the length of the line L4 is not 1: 1 but is set to a ratio according to the magnification of the optical system of the combiner 3.

(Modification 2)
1 and 4, the

light source units

2 and 2x are installed on the dashboard 44. However, the configuration of the

display devices

100 and 100x to which the present invention is applicable is not limited to this. Alternatively, the

light source units

2 and 2x may be installed near an instrument panel (instrument panel) other than the dashboard 44, such as a center console (not shown). Also by this, it is not necessary to install the

light source parts

2 and 2x in the ceiling part 41, and the

display apparatuses

100 and 100x can be mounted in various vehicle types.

(Modification 3)
In FIG. 4, the reflecting member 5 installed on the ceiling portion 41 is fixed, but the configuration of the display device 100 x to which the present invention is applicable is not limited to this. Instead, the reflecting member 5 reflects the light emitted from the

light source units

2 and 2x, for example, at a position where the principal ray L3 of the light transmitted through the combiner 3 is irradiated near the center of the reflecting member 5. , And may move along the ceiling portion 41.

In this case, the reflecting member 5 moves in the front-rear direction of the vehicle according to the light emission angle of the

light source units

2 and 2x, manually or automatically, along a guide or the like (not shown) provided on the ceiling 41. Specifically, the reflecting member 5 moves in the forward direction of the vehicle, that is, in the direction in which the sun visor is installed, as the emission angle of the

light source units

2 and 2x with respect to the horizontal direction increases. The smaller the exit angle, the more the vehicle moves rearward. Thereby, the display device 100x can suppress the lack of a part of the virtual image while suppressing the size of the reflecting member 5.

(Modification 4)
The configurations of the

position adjustment units

6 and 6x shown in FIGS. 2 and 5 are examples, and the configurations to which the present invention can be applied are not limited thereto.

For example, in the

position adjustment units

6 and 6x, the combiner 3 rotates about the

rotation support units

631 and 632 as a supporting shaft. Instead of or in addition to this, the frame unit about the slide unit 630 as an axis. The tilt of the combiner 3 may be adjusted by rotating the 63 and the combiner 3.

The present invention can be suitably applied to a head-up display and other display devices that allow a driver to visually recognize route guidance and vehicle information.

2, 2x light source unit 3 combiner 5 reflecting

member

6, 6x position adjustment unit 40 front window 41 ceiling unit 42 handle unit 44

dashboard

100, 100x display device

Claims

A light source unit that emits light constituting a display image;
A reflecting member that reflects the light;
A half mirror that transmits the light emitted from the light source unit and guides it to the reflecting member, and further reflects the light reflected by the reflecting member;
A display device comprising:
The display device according to claim 1, wherein the half mirror reflects light reflected by the reflecting member on a surface opposite to an incident surface of light emitted from the light source unit.
The display device according to claim 2, wherein the reflective member is a retroreflective member.
4. The display device according to claim 3, wherein the reflecting member is disposed non-parallel to the half mirror.
The display device according to claim 4, wherein an incident angle of the light transmitted through the half mirror to the reflecting member is smaller than an incident angle of the light emitted from the light source unit to the half mirror. .
The display device according to claim 5, wherein the half mirror reflects light reflected by the reflecting member and guides the light to a user's eye.
A housing that houses the light source unit, the reflecting member, and the half mirror;
The reflective member is disposed on a ceiling portion of the front body,
The display device according to claim 6, wherein the half mirror is disposed on an optical path of light emitted from the light source unit.
The display device according to claim 1, further comprising a position adjusting unit that adjusts a position of the half mirror.
The display according to claim 8, wherein the position adjustment unit adjusts the position of the half mirror so that a chief ray of light emitted from the light source unit passes through a central part of the half mirror. apparatus.
10. The display device according to claim 9, wherein the position adjusting unit moves the half mirror substantially parallel to a direction in which the light source unit emits light.
The reflective member is a retroreflective member,
The position adjustment unit adjusts the position of the combiner so that a point at which light reflected from the half mirror converges and a user's viewpoint substantially coincide with each other. A display device according to claim 1.
The half mirror is formed in a flat plate shape,
The position adjusting unit adjusts the position of the half mirror so that the length of the optical path from the light source unit to the half mirror is equal to the length of the optical path from the half mirror to the user's viewpoint. The display device according to claim 11.
The light source unit can change an angle at which the light is emitted,
The position adjustment unit adjusts the position of the half mirror so that the angle of the light reflected from the half mirror with respect to the horizontal direction is a predetermined angle,
The said light source part changes the angle which radiate | emits the said light so that the angle with respect to the horizontal direction of the light reflected from the said half mirror may become a predetermined angle. The display device described in 1.
The display device according to any one of claims 1 to 13, wherein the half mirror has an elliptical shape.
A head-up display mounted on a vehicle,
A light source unit that emits light constituting a display image;
A reflecting member that reflects the light;
A half mirror that transmits the light emitted from the light source and guides it to the reflecting member, and further reflects the light reflected by the reflecting member;
A head-up display comprising:
The light source unit is installed on a dashboard,
The half mirror is attached to a sun visor;
The head-up display according to claim 15, wherein the reflecting member is installed on a ceiling portion of a passenger compartment.