JP2019004483A - Display control program - Google Patents

Abstract

To provide a display control program which can display a virtual image using a mobile terminal.SOLUTION: A virtual image display device 200 includes a base part 3, a combiner 5, a short-range radio communication tag, a mobile terminal holding part 7 and a clip part 9. On the mobile terminal holding part, a mobile terminal 100 having a display 110 which displays a guide image is loaded. The combiner 5 reflects light which configures a guide image to enable an observer to view the guide image as a virtual image. The short-range radio communication tag 6 is provided on the mobile terminal holding part to transmit type information to the mobile terminal 100, loaded on the mobile terminal holding unit, to enable the mobile terminal 100 to display the guide image with a left-to-right reversed display. The control part of the mobile terminal 100 executes a predetermined application to display the guide image, to determine the display mode of the guide image according to the type information received from the short-range radio communication tag.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a technique for displaying a virtual image.

  2. Description of the Related Art Conventionally, there is a head-up display technique for visually recognizing an image indicating information related to driving of a vehicle as a virtual image from a driver's eye position (eye point). Patent Document 1 discloses an information display device that can be attached to a vehicle and used as a head-up display, and can be detached from the vehicle and used as a portable information display device. In addition, when the information display device described in Patent Document 1 detects that it is used as a head-up display, the video on the display screen is inverted and displayed.

JP 2001-333351 A

  The information display device described in Patent Document 1 is a dedicated machine capable of displaying as a portable information display device and displaying as a head-up display. On the other hand, it is convenient that the head-up display can be configured as appropriate by using the display on the display of a mobile terminal such as a mobile phone held by the user. In view of the above, the main object of the present invention is to provide a display control program capable of displaying a virtual image using a portable terminal.

  In the invention described in claim, the display control program causes the computer included in the mobile terminal to visually recognize the image as a virtual image by reflecting the image light of the image displayed on the display unit of the mobile terminal. In the state where the portable terminal is mounted on the virtual image display device, the display unit receives the information from the short-range wireless communication means provided in the virtual image display device, and the display unit according to the information received by the reception step And a display control step of changing a display mode of an image to be displayed.

1 schematically shows a virtual image display system according to a first embodiment. The front view of a portable terminal is shown. 1 shows a schematic configuration of a mobile terminal. It is the figure which showed typically the side view of the virtual image display apparatus with which the portable terminal was mounted | worn. It is a perspective view of the virtual image display apparatus with which the portable terminal was mounted | worn. The side view of the portable terminal hold | maintained at the portable terminal holding | maintenance part at the time of reversing a holder is shown. The state before and after removing a portable terminal is shown. (A) shows the front view of the portable terminal which displayed the guidance image according to classification information, (B) shows the virtual image which a user visually recognizes via a combiner. The side view of the virtual image display system which shows the positional relationship of a display, a combiner, and a virtual image is shown. The positional relationship between a certain object point, a combiner, and a virtual image is schematically shown. It is a graph which shows the relationship between the distance a and the distance b when the curvature in the reflective surface of a combiner is constant. It is a graph which shows the relationship between the distance b when the distance a is made constant, and the curvature radius r of a combiner. An example of a driver's field of view including a combiner is shown. (A) shows a front view of the portable terminal when the vehicle is inclined with respect to the horizontal direction by a predetermined angle. (B) shows the example of a display of the virtual image visually recognized via a combiner. The side view of the virtual image display apparatus of the accommodation state which concerns on 5th Example is shown. The side view of the virtual image display apparatus which concerns on 5th Example of the state which displays a virtual image is shown. (A) shows a side view of the virtual image display device when the reflecting portion is rotated about 90 degrees counterclockwise. (B) shows the side view of the virtual image display apparatus after rotating a reflection part and a portable terminal holding | maintenance part about 45 degree | times counterclockwise. The side view of the virtual image display apparatus which concerns on the modification 2 is shown. The side view of the virtual image display apparatus which concerns on the modification 3 is shown. The side view of the virtual image display apparatus installed in the dashboard is shown. The side view of the virtual image display apparatus which concerns on the modification 8 is shown.

  According to a preferred embodiment of the present invention, the virtual image display device includes a holding unit that detachably holds a portable terminal having a display surface for displaying an image, and reflects light that constitutes the image, and displays the image as a virtual image. A combiner that is visually recognized by an observer, and a base portion to which the holding means and the combiner are coupled.

  The virtual image display device includes a holding unit, a combiner, and a base unit. The holding means detachably holds a portable terminal having a display surface for displaying an image. A combiner reflects the light which comprises the image which a portable terminal displays, and makes an observer visually recognize the said image as a virtual image. The holding means and the combiner are coupled to the base portion. Thus, the virtual image display device has a configuration in which the mobile terminal can be freely attached and detached, and uses the mobile terminal as a light source. Therefore, the virtual image display apparatus can make a viewer visually recognize a virtual image suitably using a viewer's portable terminal.

  In one aspect of the virtual image display device, the base portion is connected to a ceiling portion of a vehicle or an attaching means that can be attached to a sun visor equipped on the ceiling portion.

In another aspect of the virtual image display device, the base portion includes a connection member that rotatably connects the base portion to the attachment means.
In another aspect of the virtual image display device, the holding unit holds the mobile terminal in a direction in which a normal direction of the display surface of the mobile terminal passes above a center point of the reflection surface of the combiner. According to this aspect, the portable terminal is suitably held so as to widen the observer's head clearance.

  In another aspect of the virtual image display device, the combiner has a concave reflecting surface whose curvature gradually increases from the upper part to the lower part. According to this aspect, even when the display surface of the mobile terminal is tilted upward from the center of the combiner, it is possible to suppress the display of the width of the upper end portion of the virtual image being shorter than the width of the lower end portion. . In addition, the entire virtual image can be viewed with an appropriate sense of distance.

  In another aspect of the virtual image display device, the curvature of the reflecting surface gradually changes so that the imaging distance of the virtual image in the lower portion is longer than that in the upper portion. According to this aspect, when displaying a virtual image indicating information of an object that is farther from the current position as it approaches the lower end of the virtual image, it is possible for the observer to appropriately view the virtual image with a sense of distance in accordance with the content.

  In another aspect of the virtual image display device, the holding unit is rotatably coupled to the base unit so that a display surface of a portable terminal held by the holding unit is directed to the combiner side and the observer side. Has been. According to this aspect, when using the mobile terminal, the observer can suitably operate the display surface of the mobile terminal facing the front.

  In another aspect of the virtual image display device, the holding unit is coupled to the base portion in a configuration that allows the distance from the combiner to be changed. According to this aspect, the observer's head clearance can be suitably adjusted.

  In another aspect of the virtual image display device, the virtual image display device transmits information related to a type of the virtual image display device, which is a basis for performing control for switching a mode of an image displayed on the display surface by the mobile terminal. And transmitting means for transmitting information relating to the type to the portable terminal when the holding means and the portable terminal are within a predetermined distance. According to this aspect, the virtual image display device can cause the mobile terminal to appropriately determine the display mode of the guide image so that the observer can appropriately visually recognize the virtual image.

  In another aspect of the virtual image display device, the virtual image display device includes a reflection unit that is coupled to the base portion and reflects light constituting an image displayed on the display surface by the portable terminal toward the combiner. The holding means holds the display surface of the portable terminal toward the reflecting means. According to this aspect, the virtual image display device can suppress left-right reversal of the image and virtual image displayed by the mobile terminal.

  In another aspect of the virtual image display device, the holding unit holds the display surface of the mobile terminal substantially parallel to the base portion. According to this aspect, the virtual image display device can suitably generate the observer's head clearance.

  In another aspect of the virtual image display device, the holding means may be rotatably attached to the base portion so that the display surface of the portable terminal held by the holding means is directed to the reflecting means side and the observer side. Are combined. According to this aspect, when using the mobile terminal, the observer can suitably operate the display surface of the mobile terminal facing the front.

  In another aspect of the virtual image display device, the reflection means is coupled to the base portion so as to be rotatable in the same direction as the rotation direction of the holding means, and the holding means is capable of rotating the reflection means. It rotates in conjunction with the rotation of the reflecting means within a predetermined angle range of the angle range. According to this aspect, when the observer uses the portable terminal, the display surface of the portable terminal can be preferably directed to the front.

  In another aspect of the virtual image display device, the combiner is coupled to the base portion in a configuration that can change a distance from the observer. According to this aspect, the observer can suitably adjust the display position of the virtual image and the size of the virtual image.

  In another aspect of the virtual image display device, the combiner is provided with a light shielding member that blocks or attenuates external light from a direction in which the observer visually recognizes the virtual image. According to this aspect, the virtual image display device can make a virtual image be viewed appropriately even when the amount of light output by the mobile terminal is relatively low with respect to external light.

  Hereinafter, preferred first to fifth embodiments of the present invention will be described with reference to the drawings. In the following, “rotation” includes a case where the movement direction can be both clockwise and counterclockwise, and also includes a case where the movable range (angle) is limited.

<First embodiment>
[Configuration of head-up display]
FIG. 1 schematically shows a virtual image display system according to a first embodiment. As illustrated in FIG. 1, the virtual image display system includes a mobile terminal 100 having a display 110 and a virtual image display device 200 that displays a display on the display 110 of the mobile terminal 100 as a virtual image “Iv”. FIG. 1 is a side view of the driver's seat of the vehicle, and the driver sits on a seat in the passenger compartment. Above the driver's head is a roof (sheet metal) 27 that forms the outer frame of the vehicle, and below that is a ceiling 28 that is the interior of the passenger compartment. There is a vehicle windshield 25 in front of the driver.

  The mobile terminal 100 is a mobile terminal such as a smartphone or iPad (registered trademark), and is held by the virtual image display device 200 with the display 110 facing the windshield 25. Then, the mobile terminal 100 displays on the display 110 an image (also referred to as “guidance image Im”) for assisting driving such as a map around the current position and a route to the destination.

  The virtual image display device 200 is installed obliquely upward in front of the driver, and the terminal device 100 is detachable. The virtual image display device 200 mainly includes a base unit 3, a combiner 5, a mobile terminal holding unit 7, an arm 8, and a clip unit 9.

  The base part 3 is formed in a plate shape, and is attached with a portable terminal holding part 7, an arm 8 that holds the combiner 5, and a clip part 9. Hereinafter, in FIG. 1, the direction in which the base portion 3 extends is the “X-axis direction”, the direction perpendicular to the base portion 3 is the “Z-axis direction”, and the direction perpendicular to the X-axis direction and the Z-axis direction is “Y-axis”. Direction, and the positive direction of each axis is determined in the direction shown in FIG. 1 and FIG.

  The combiner 5 is a half mirror. When light emitted from the display 110 of the mobile terminal 100 is irradiated while external light from the front of the vehicle is transmitted, the irradiated light is directed to the driver's eye point “Pe”. It is an optical member that makes the observer visually recognize the virtual image Iv by partially reflecting. Note that the tip of the arrow in the virtual image Iv indicates the upward direction. The display light reflecting surface of the combiner 5 has a concave shape. Thereby, the combiner 5 displays the virtual image Iv in an enlarged manner. The arms 8 are a pair of support members attached to both ends of the base portion 3 in the Y-axis direction. The arms 8 extend in the direction of the windshield 25 and sandwich the combiner 5.

  The portable terminal holding unit 7 holds the portable terminal 100 with the display 110 of the portable terminal 100 facing the combiner 5. In addition, a short-range wireless communication tag 6 illustrated in FIG. 4 to be described later is provided on the surface of the mobile terminal holding unit 7 in contact with the back surface of the mobile terminal 100. The portable terminal holding unit 7 is an example of the “holding unit” in the present invention.

  The near field communication tag 6 is a tag capable of near field communication such as NFC (Near Field Communication). When the mobile terminal 100 is attached to the mobile terminal holding unit 7 and can communicate with the mobile terminal 100, the short-range wireless communication tag 6 is information corresponding to the type of the virtual image display device 200 (also referred to as “type information Ik”). .) The type information Ik is information for the mobile terminal 100 to determine the display mode on the display 110 of the guide image Im, and details will be described later.

  The clip portion 9 is attached to the upper surface of the base portion 3 facing the ceiling 28, and attaches the base portion 3 to the sun visor 29 with the sun visor 29 sandwiched therebetween. The clip portion 9 is a plate-like elastic body having a substantially J-shaped cross section, and has an elastic force that urges the sun visor 29 in the direction of nipping. The clip part 9 is an example of the “attachment means” in the present invention.

[Configuration of mobile terminal]
Next, the configuration of the mobile terminal 100 will be described. FIG. 2 shows a front view of the mobile terminal 100. The portable terminal 100 is a portable terminal that can be carried by a user, and includes a display 110 on which a touch panel 120 is stacked.

  FIG. 3 shows a schematic configuration of the mobile terminal 100. As illustrated in FIG. 3, the mobile terminal 100 includes an output unit 11, an input unit 12, a storage unit 13, a communication unit 14, a GPS reception unit 15, a tilt detection unit 16, and a control unit 17. Prepare. Each element of the portable terminal 100 is connected to each other via a bus (not shown) so that necessary information can be transmitted between the elements.

  The output unit 11 includes a display 110 and a speaker (not shown), and outputs information for responding to the operation of the user of the mobile terminal 100 based on the control of the control unit 17.

  The input unit 12 is an interface that includes the touch panel 120 and accepts input of necessary instructions and information, that is, operations performed by the terminal user to the mobile terminal 100. In addition to the touch panel 120, the input unit 12 may include keys, switches, buttons, voice input devices, and the like for inputting various commands and data.

  The storage unit 13 stores a program for controlling the operation of the mobile terminal 100 and holds information necessary for the operation of the mobile terminal 100. Further, the storage unit 13 stores information on the size of the display 110 and the like.

  The communication unit 14 transmits / receives data to / from other devices according to a predetermined protocol. In particular, in the present embodiment, the communication unit 14 performs wireless communication with the short-range wireless communication tag 6 illustrated in FIG. 4 in a state where the mobile terminal 100 is attached to the mobile terminal holding unit 7, and the short-range wireless communication tag 6 receives the type information Ik.

  The GPS receiving unit 15 generates information on the current position of the mobile terminal 100 by receiving radio waves carrying downlink data including positioning data from a plurality of GPS satellites, and transmits the information to the control unit 17. The inclination detection unit 16 is an acceleration sensor or a gyro sensor, for example, and detects the inclination of the mobile terminal 100. Then, the inclination detection unit 16 transmits the generated detection signal to the control unit 17. In addition to the inclination in the direction in which the mobile terminal 100 in front view of FIG. 2 is rotated, the inclination detection unit 16 is inclined in the direction in which the mobile terminal 100 is rotated about the longitudinal direction or the short direction of the mobile terminal 100. May also be detected.

  The control unit 17 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like (not shown), and executes application software stored in the storage unit and so on. Various controls are performed on each of the components. For example, based on the type information Ik received from the virtual image display device 200, the control unit 17 determines the display mode of the guide image Im so that the observer can preferably visually recognize the virtual image Iv. This control method will be described in detail in the [Display Control Method] section.

[Detailed configuration of virtual image display device]
Next, a detailed configuration of the virtual image display device 200 will be described with reference to FIGS. 4 and 5. FIG. 4 is a diagram schematically showing a side view of the virtual image display device 200 to which the mobile terminal 100 is attached. FIG. 5 is a perspective view of the virtual image display device 200 to which the mobile terminal 100 is attached. 4 and 5, the mobile terminal 100 is held by the mobile terminal holding unit 7 in a horizontally long state, that is, in a state where the longitudinal direction of the mobile terminal 100 is parallel to the Y axis.

(1) Combiner Position Adjustment Mechanism First, a mechanism related to the position adjustment of the combiner 5 will be described.

  As shown in FIGS. 4 and 5, guide portions 31 for sliding the arm 8 in the X-axis direction are provided on both side surfaces of the base portion 3 in the Y-axis direction. A groove is formed in the guide portion 31 along the X-axis direction. A sliding portion 32 to which one end of the arm 8 is connected is slidably fitted into the guide portion 31 in a direction along the X-axis direction (see arrows 23x and 23y in FIG. 4). The slide portion 32 is provided with a restriction portion 320 that restricts the movement range of the slide portion 32 to the range where the groove of the guide portion 31 is formed. The restricting portion 320 is fixed to the slide portion 32 in a state of being inserted into the groove of the guide portion 31 and is movable in the X-axis direction along the groove of the guide portion 31.

  The arm 8 is rotatable in the vertical direction of the virtual image display device 200 (see arrows 24x and 24y in FIG. 4) with the end connected to the slide part 32 as an axis. Further, the end of the arm 8 opposite to the above-described end holds the combiner 5 so as to be rotatable about the Y axis (see arrows 25x and 25y in FIG. 4).

  According to the above configuration, the user can suitably adjust the position of the combiner 5 in the X-axis direction by operating the slide portion 32. In general, the display position and size of the virtual image Iv vary depending on the distance between the combiner 5 and the display 110 on which the display image is displayed. Therefore, the user can suitably adjust the display position and size of the virtual image Iv by adjusting the position of the combiner 5 in the X-axis direction using the slide portion 32. Moreover, the user can adjust the position of the combiner 5 suitably by adjusting the attachment angle of the arm 8 with respect to the slide part 32 and the attachment angle with respect to the arm 8 of the combiner 5. FIG. Therefore, the virtual image display device 200 can suitably cope with the difference in the height of the ceiling of the vehicle to which the virtual image display device 200 is attached or the physique of the user.

(2) Positioning Mechanism of Portable Terminal Next, a mechanism relating to position adjustment of the portable terminal 100 will be described with reference to FIGS. 4 and 5.

  The portable terminal holding unit 7 includes an installation unit 70, a hinge unit 71, a first arm 72, a second arm unit 74, and a holder 75. The installation part 70 is provided in the base part 3. The installation portion 70 is provided with a hinge portion 71 that holds the first arm 72 rotatably around the Y axis (see arrows 20x and 20y in FIG. 4). The end of the first arm 72 opposite to the hinge portion 71 is joined to the second arm 74. The second arm 74 is joined to the first arm 72 so as to be rotatable about the Y axis (see arrows 21x and 21y in FIG. 4). The second arm 74 is connected to the back surface of the holder 75 substantially perpendicularly.

  The holder 75 holds the mobile terminal 100. The holder 75 includes a support part 75a that supports the mobile terminal 100 and a movable part 75b that extends from the support part 75a. The end portion 750b of the movable portion 75b is accommodated in the support portion 75a. And the movable part 75b is slidable in the direction which pinches | interposes the portable terminal 100 (refer arrow 22x, 22y of FIG. 4). Thereby, the holder 75 can hold the portable terminal 100 suitably regardless of the size of the portable terminal 100. Further, the short-range wireless communication tag 6 is provided on the surface of the support portion 75a facing the mobile terminal 100. The short-range wireless communication tag 6 is disposed at a position where the mobile terminal 100 can communicate with the communication unit 14 of the mobile terminal 100 in a state where the mobile terminal 100 is attached to the mobile terminal holding unit 7.

  According to this configuration, the mounting angle of the first arm 72 with respect to the installation portion 70 can be adjusted, and the mounting angle of the second arm 74 with the first arm 72 can be adjusted. Thereby, the user can manually adjust the position of the display 110 of the mobile terminal 100 to a position suitable for visually recognizing the virtual image Iv. In general, the display position and size of the virtual image Iv vary depending on the distance between the combiner 5 and the display 110. Therefore, the user can suitably adjust the display position and size of the virtual image Iv by adjusting the distance of the holder 75 and the portable terminal 100 from the combiner 5 with this configuration.

  Preferably, the holder 75 is a portable terminal in such a direction that the normal direction of the display 110 (see arrow 28 in FIG. 4) passes above the center point of the reflecting surface of the combiner 5 (see broken line 29 in FIG. 4). Hold 100. Thereby, it can prevent that the holder 75 and the portable terminal 100 protrude with respect to a user's head, and can fully provide a head clearance.

  Further, the second arm 74 can rotate about 180 degrees with respect to the first arm 72 in the direction of the arrow 21x in FIG. 4, whereby the holder 75 causes the display 110 of the mobile terminal 100 to be set to the eye point Pe. Hold in a pointed state. This will be described with reference to FIG.

  6 shows a side view of the mobile terminal 100 held by the mobile terminal holding unit 7 when the holder 75 is inverted from the state shown in FIG. As shown in FIG. 6, in this case, the display 110 of the mobile terminal 100 is fixed in a state where it is directed to the eye point Pe. Therefore, the user can operate the mobile terminal 100 while directly viewing the display 110 in a state where the mobile terminal 100 is mounted on the mobile terminal holding unit 7.

  Next, a case where the mobile terminal 100 is detached from the mobile terminal holding unit 7 will be described with reference to FIG.

  FIG. 7 shows a state before and after removing the portable terminal 100 by sliding the movable part 75b of the holder 75 from the state of FIG. In FIG. 7, the movable part 75b and the portable terminal 100 before removing the portable terminal 100 are indicated by broken lines. As illustrated in FIG. 7, when removing the mobile terminal 100, the user slides the movable portion 75 b in the direction of separating the movable portion 75 b from the support portion 75 a (see the arrow 22 x). Thereby, the portable terminal 100 can be suitably removed from the holder 75.

[Display control method]
Next, a display control method executed by the control unit 17 of the mobile terminal 100 will be described. The control unit 17 executes a predetermined application for displaying the guide image Im, and determines the display mode of the guide image Im based on the type information Ik received from the short-range wireless communication tag 6.

  Here, the type information Ik is, for example, information on the necessity of inverting the guide image Im, information indicating whether the mobile terminal 100 is held in portrait or landscape, information on the size of the combiner 5, and combiner 5 Information on the distance between the mobile terminal holding unit 7, information on the mounting angle of the mobile terminal 100 with respect to the combiner 5, information on the size of the mobile terminal 100 that can be held by the mobile terminal holding unit 7, and information on the curvature of the combiner. In addition, the value which may be changed based on user operation, such as the distance of the above-mentioned combiner 5 and the portable terminal holding | maintenance part 7, the attachment angle with respect to the combiner 5 of the portable terminal 100, is used, for example generally The standard value of

  Based on the type information Ik, the control unit 17 determines whether the guidance image Im needs to be reversed, the direction of the guidance image Im, the size of the guidance image Im, the display position of the guidance image Im on the display 110, and the guidance image. The vertical and horizontal expansion / contraction ratio (namely, aspect ratio) of Im is determined. A specific example will be described with reference to FIG.

  FIG. 8A shows a front view of the mobile terminal 100 displaying the guide image Im, and FIG. 8B shows a virtual image Iv visually recognized by the user via the combiner 5 in the example of FIG. Show.

  In the example of FIGS. 8A and 8B, the control unit 17 determines that the virtual image Iv visually recognized via the combiner 5 is based on the type information Ik received from the short-range wireless communication tag 6 with respect to the guide image Im. Recognize that it is displayed horizontally reversed. Therefore, in this case, as shown in FIG. 8A, the control unit 17 displays the guide image Im on the display 110 in advance by being horizontally reversed. As described above, the control unit 17 can recognize the necessity of inversion of the guide image Im based on the type information Ik, and can make the user appropriately recognize the virtual image Iv.

  Further, the control unit 17 recognizes whether the display 110 is held in a portrait or landscape state based on the type information Ik, and determines the direction of the guide image Im according to the recognition result. Specifically, when the portable terminal 100 is held in a vertically long state, the control unit 17 matches the vertical direction of the guide image Im with the longitudinal direction of the display 110 and holds the portable terminal 100 in a horizontally long state. In this case, the vertical direction of the guide image Im is matched with the short direction of the display 110. Note that the control unit 17 may determine the direction of the guide image Im based on the output of the inclination detection unit 16 instead of the type information Ik.

  Further, the control unit 17 determines the size of the guide image Im in the display 110 based on the size information of the combiner 5 included in the type information Ik and the size information of the display 110 stored in the storage unit 13. To do. For example, in this case, the storage unit 13 stores in advance a map or the like indicating an appropriate size of the guide image Im for each combination of the size of the combiner 5 and the size of the display 110, and the control unit 17 stores the map. The size of the guide image Im is determined by referring to it. In the example of FIGS. 8A and 8B, when the control unit 17 displays the guide image Im on the entire surface of the display 110, the entire guide image Im is not projected onto the combiner 5 (that is, the guide image Im And the guide image Im is reduced by a predetermined rate and displayed on the display 110. Thereby, the control part 17 can make a user visually recognize suitably the whole guide image Im as the virtual image Iv.

  Moreover, the control part 17 determines the display position in the display 110 of the guidance image Im based on the attachment angle etc. with respect to the combiner 5 of the portable terminal 100 contained in the classification information Ik. For example, in this case, the storage unit 13 stores in advance a map or the like indicating the display position of the appropriate guide image Im for each attachment angle or the like of the portable terminal 100 with respect to the combiner 5, and the control unit 17 refers to the map. Thus, the display position of the guide image Im is determined. In the example of FIGS. 8A and 8B, the control unit 17 recognizes that the virtual image Iv is shifted to the lower left than the center of the combiner 5 when the guide image Im is displayed at the center of the display 110. The guide image Im is displayed by shifting to the upper right in advance. Thereby, the control part 17 can display suitably the virtual image Iv according to the center of the combiner 5. FIG.

  Similarly, the control unit 17 determines the aspect ratio of the guide image Im based on the type information Ik. For example, in this case, the storage unit 13 stores in advance a map or the like indicating an appropriate aspect ratio of the guide image Im for each attachment angle of the mobile terminal 100 included in the type information Ik, and the control unit 17 The aspect ratio of the guide image Im is determined with reference to the map. In the example of FIGS. 8A and 8B, the control unit 17 recognizes that the virtual image Iv is displayed by being contracted by a predetermined rate in the vertical direction with respect to the guide image Im based on the type information Ik. Im is displayed with an aspect ratio that is longer than the normal aspect ratio by a predetermined ratio in the vertical direction. Thereby, the control part 17 can make a user visually recognize the virtual image Iv with an appropriate aspect ratio.

  Preferably, the control unit 17 may change the display mode of the guide image Im based on the input to the input unit 12. Generally, depending on the user, even when the guide image Im is corrected based on the type information Ik as described above, the virtual image Iv may not be visually recognized appropriately. In consideration of the above, the control unit 17 receives an input for correcting the display position, aspect ratio, and the like of the guide image Im by the input unit 12, and changes the display mode of the guide image Im based on the input. Thereby, the control part 17 can adjust suitably the display mode of the virtual image Iv according to a user preference.

  As described above, the virtual image display device 200 according to the first embodiment includes the mobile terminal holding unit 7, the combiner 5, and the base unit 3. The portable terminal holding unit 7 detachably holds the portable terminal 100 having the display 110 that displays the guide image Im. The combiner 5 reflects light constituting the guide image Im displayed on the mobile terminal 100 and causes the viewer to visually recognize the image as a virtual image Iv that overlaps the front landscape. Base portion 3 is coupled to portable terminal holding portion 7 and combiner 5. As described above, the virtual image display device 200 has a configuration in which the mobile terminal 100 is detachable, and uses the mobile terminal 100 as a light source. Therefore, the virtual image display apparatus can make a user visually recognize the virtual image Iv suitably using a user's portable terminal 100. FIG.

<Second embodiment>
In the second example, in addition to the display control of the guide image Im of the first example, the control unit 17 preferably performs keystone correction of the guide image Im. Thereby, the control part 17 displays the image displayed on the said area | region smaller, so that the area | region of the display 110 near the combiner 5 is shown.

  FIG. 9 shows a side view of the virtual image display system showing the positional relationship between the display 110, the combiner 5, and the virtual image Iv. Hereinafter, the portion of the guide image Im displayed on the upper end in the display 110 is referred to as “upper end image portion”, and the portion of the guide image Im displayed on the lower end in the display 110 is referred to as “lower end image portion”.

  In FIG. 9, the distance “a1” between the upper end image portion and the position of the combiner 5 on which the upper end image portion is projected is greater than the distance “a2” between the lower end image portion and the position of the combiner 5 on which the lower end image portion is projected. long. Therefore, the distance “b1” between the position of the combiner 5 where the upper end image portion is projected and the position where the virtual image Iv corresponding to the upper end image portion is imaged is the position of the combiner 5 where the lower end image portion is projected and the lower end image portion. Is longer than the distance “b2” from the position at which the virtual image Iv corresponding to is formed. As a result, the portion of the virtual image Iv corresponding to the lower end image portion is displayed larger than the portion of the virtual image Iv corresponding to the upper end image portion. Therefore, when the rectangular guide image Im is displayed, the virtual image Iv is displayed in a trapezoid whose upper end portion is short.

  Considering the above, in the second embodiment, the control unit 17 displays an image to be displayed in a smaller area as the area of the display 110 is closer to the combiner 5. Specifically, the control unit 17 recognizes the tilt of the display 110 with respect to the Z axis based on the output of the tilt detection unit 16 and corrects the trapezoid of the guide image Im according to the recognized tilt of the display 110. In this case, for example, the control unit 17 refers to the map of the correction amount of the trapezoid correction of the guide image Im appropriate for each inclination of the display 110 stored in advance in the storage unit 13, thereby correcting the keystone of the guide image Im. Do. In addition to the inclination of the display 110, the control unit 17 refers to the information on the inclination of the combiner 5 included in the type information Ik, calculates the relative inclination of the display 110 with respect to the combiner 5, and determines the relative inclination. Accordingly, the keystone correction of the guide image Im may be performed.

  Here, the relationship between the distances a1 and a2 in FIG. 9 and the distances b1 and b2 will be supplementarily described with further reference to FIGS.

  FIG. 10 schematically shows a positional relationship among an object point P1, a combiner 5, and a virtual image Iv of an object. Thereafter, the distance between the object point P1 and the combiner 5 is “a”, the distance between the virtual image Iv and the combiner 5 is “b”, the focal length of the reflecting surface of the combiner 5 is “f”, and the curvature of the reflecting surface of the combiner 5 is set. Let the radius be “r”.

  In this case, the distances a and b and the focal length f have a relationship defined by the following formula (1) based on the imaging formula.

1 / a + 1 / (− b) = 1 / f (1)
As shown in the following formula (2), the focal length f of the reflecting surface of the combiner 5 is ½ of the radius of curvature r of the reflecting surface of the combiner 5.

f = r / 2 (2)
According to the expressions (1) and (2), when the radius of curvature r on the reflecting surface of the combiner 5 is constant, the distance b between the combiner 5 and the virtual image Iv is the distance a between the combiner 5 and the object point P1. It changes according to.

  FIG. 11 is a graph showing the relationship between the distance a and the distance b in FIG. 10 when the radius of curvature r on the reflecting surface of the combiner 5 is constant. As shown in FIG. 11, when the radius of curvature r on the reflecting surface of the combiner 5 is constant, the distance b between the combiner 5 and the virtual image Iv increases as the distance a between the combiner 5 and the object point P1 increases. Further, the distances a1 and a2 in FIG. 9 correspond to the distance a in FIG. 10, and the distances b1 and b2 in FIG. 9 correspond to the distance b in FIG. Further, since the distance a2 is shorter than the distance a1, in the example of FIG. 9, the distance b2 corresponding to the lower end image portion is shorter than the distance b1 corresponding to the upper end image portion.

  In this way, when the portable terminal 100 is held with the display 110 tilted upward from the center point of the combiner 5, the virtual image Iv portion corresponding to the lower end image portion is the virtual image Iv portion corresponding to the upper end image portion. Is displayed relatively close and large. Therefore, in this case, the control unit 17 performs trapezoidal correction of the guide image Im so that the display width is narrowed from the upper end to the lower end of the guide image Im. Thereby, the control part 17 can make a user visually recognize the virtual image Iv suitably.

<Third embodiment>
In the third embodiment, instead of or in addition to the second embodiment, the combiner 5 of the virtual image display device 200 has a concave reflecting surface whose curvature gradually increases from the upper part to the lower part. As a result, the virtual image display device 200 prevents the virtual image Iv from being distorted into a trapezoid and makes the entire virtual image Iv uniform distance from the eye point Pe so that the virtual image Iv is visually recognized.

  FIG. 12 is a graph showing the relationship between the distance b and the radius of curvature r of the combiner 5 when the distance a is constant in the example of FIG. As shown in FIG. 12, when the distance a is constant, the distance b and the radius of curvature r have a negative correlation. Therefore, in the third embodiment, the radius of curvature r of the reflecting surface of the combiner 5 is reduced from the upper part to the lower part so as to cancel out the distance b becoming shorter toward the lower part of the combiner 5 due to the inclination of the portable terminal 100 with respect to the combiner 5. Gradually becomes smaller. Thereby, the virtual image Iv can be visually recognized by setting the entire virtual image Iv to a uniform distance from the eye point Pe.

  Next, the effect of the third embodiment will be described with reference to FIG.

  FIG. 13 shows an example of the field of view of the driver including the combiner 5. In FIG. 13, the virtual image display system displays a route image 90 indicating a route planned to travel as a virtual image Iv at a position where the road in the landscape serving as the route is vertically inverted with respect to the horizon.

  In this case, the lower end image portion (see the broken line frame 95) of the route image 90 indicates a road at a position far from the current position, and the upper end image portion (see the broken line frame 96) of the route image 90 is the current position. A road at a position relatively close to the position is shown. On the other hand, as described with reference to FIG. 9, when the mobile terminal 100 faces upward from the combiner 5, the distance b <b> 1 corresponding to the upper end image portion of the root image 90 is the distance corresponding to the lower end image portion of the root image 90. It becomes longer than b2. Accordingly, in this case, the upper end image portion of the route image 90 corresponding to the road near the current position is displayed at a position relatively far from the eye point Pe, and the lower end image of the route image 90 corresponding to the road far from the current position. The part is displayed at a position relatively close to the eye point Pe. Therefore, in this case, the virtual image Iv is displayed against the sense of distance that the virtual image Iv should indicate.

  Considering the above, in the third embodiment, the radius of curvature r is gradually reduced with the reflecting surface of the combiner 5 facing from the top to the bottom. Thereby, it is possible to prevent the distance b between the combiner 5 and the virtual image Iv from becoming shorter at the lower part of the combiner 5 due to the inclination of the portable terminal 100 with respect to the combiner 5.

  Preferably, in FIG. 9, the combiner 5 and the virtual image Iv corresponding to the upper end image portion have a distance b1 shorter than the distance b2 between the combiner 5 and the virtual image Iv corresponding to the lower end image portion. The radius of curvature r may be gradually reduced with the reflecting surface 5 being directed from the top to the bottom. That is, in this case, the lower portion of the combiner 5 due to the inclination of the portable terminal 100 with respect to the combiner 5 exceeds the distance b between the combiner 5 and the virtual image Iv, and the combiner 5 changes the curvature of the reflecting surface of the combiner 5. The distance b between the combiner 5 and the virtual image Iv is made longer at the lower part of 5. Accordingly, the lower part of the virtual image Iv can be displayed farther from the eye point Pe, and the user can more realistically recognize the route image 90 of FIG.

  In this case, the type information Ik includes information related to the curvature of the combiner 5, and the control unit 17 of the portable terminal 100 determines the current position at a position where the curvature radius r of the combiner 5 is small based on the information related to the curvature of the combiner 5. The display position on the display 110 may be changed so that an image desired to be associated with a position far away from the image is projected.

<Fourth embodiment>
In the fourth embodiment, in addition to the first to third embodiments, the control unit 17 detects the horizontal tilt of the display 110 with respect to the horizontal direction, and displays the guide image Im in the direction opposite to the tilt of the display 110 by the tilt. Rotate to Thereby, the control part 17 displays the virtual image Iv suitably, without inclining right and left with respect to a horizontal direction, even if it is drive | working an unpaved road etc. as an example.

  In general, when the state of a running road is bad, the virtual image display device 200 may tilt left and right (that is, in the roll direction) with respect to the horizontal direction together with the vehicle. On the other hand, due to human characteristics, the user unconsciously moves the upper body and tries to correct the line of sight. As a result, the user visually recognizes the virtual image Iv that is tilted to the left and right with respect to the horizontal direction. Considering the above, the control unit 17 detects the tilt in the roll direction made by the display 110 with respect to the horizontal direction based on the output of the tilt detection unit 16 and the like, and the guide image Im is set as the tilt of the display 110 by the tilt. Rotate in the opposite direction.

  FIG. 14A shows a front view of the mobile terminal 100 when the vehicle is tilted counterclockwise with respect to the horizontal direction by an angle “θ”. FIG. 14B shows a display example of the virtual image Iv visually recognized through the combiner 5.

  As shown in FIG. 14A, in this case, the display 110 tilts counterclockwise by an angle θ with respect to the horizontal direction, and as shown in FIG. 14B, the combiner 5 moves from the horizontal direction by an angle θ. Tilt clockwise. In this case, the control unit 17 detects that the display 110 is tilted counterclockwise by an angle θ from the horizontal direction based on the output of the tilt detection unit 16, and the guide image Im is rotated clockwise by the opposite direction. Rotate relative to display 110 by θ. As a result, as shown in FIG. 14A, the left-right direction of the guide image Im is parallel to the horizontal direction. As a result, as shown in FIG. 14B, the virtual image Iv is in the horizontal direction. It is displayed without tilting.

  As described above, in the fourth embodiment, the control unit 17 can make the user preferably visually recognize the virtual image Iv without tilting the virtual image Iv even when the vehicle is traveling on an unpaved road or the like.

  Further, according to the configuration of the fourth embodiment, even when the virtual image display device 200 cannot be mounted horizontally with respect to the vehicle due to restrictions such as the vehicle shape, the control unit 17 favors the virtual image Iv without the virtual image Iv being inclined. Can be visually recognized by the user.

<Fifth embodiment>
In the fifth embodiment, the mobile terminal 100 is installed substantially parallel to the base unit 3. Thereby, a driver | operator's head clearance is ensured suitably.

  FIG. 15 shows a side view of the virtual image display device 200A in the housed state according to the fifth embodiment, and FIG. 16 shows a side view of the virtual image display device 200A in a state of displaying the virtual image Iv.

  As illustrated in FIG. 15, the virtual image display device 200 </ b> A includes a base unit 3, a reflection unit 4, a combiner 5, a portable terminal holding unit 7 </ b> A, an arm 8, and a clip unit 9. In the following description, the same components as those of the virtual image display apparatus 200A similar to the virtual image display apparatus 200 according to the first embodiment are appropriately denoted by the same reference numerals, and the description thereof is omitted. Note that the short-range wireless communication tag 6 (not shown) is disposed at a position where the mobile terminal 100 can communicate with the communication unit 14 of the mobile terminal 100 in a state where the mobile terminal 100 is attached to the mobile terminal holding unit 7A.

  The reflection unit 4 includes a mirror 40 for reflecting light emitted from the display 110 toward the combiner 5. The reflection unit 4 is rotatable about the Y axis with the rotation shaft portion 41 as an axis. The rotating shaft portion 41 is supported by a support portion 38 provided on the surface of the base portion 3 opposite to the surface on which the clip portion 9 is provided. Moreover, the reflection part 4 has the stopper 42 for fixing the reflection part 4 with respect to 7 A of portable terminal holding | maintenance parts. The mirror 40 is an example of the “reflecting means” in the present invention.

  The mobile terminal holding unit 7 </ b> A holds the mobile terminal 100 substantially parallel to the base unit 3. The mobile terminal holding unit 7 </ b> A has a pair of arms 76 that hold the mobile terminal 100 from both side surfaces of the mobile terminal 100. The portable terminal holding portion 7A has a rotation shaft (not shown) that is rotatably fixed to the support portion 38, and is rotatable within a range of about 90 degrees in the counterclockwise direction from the state of FIG. The portable terminal holding portion 7A has a fitting portion 78 that can be fitted to the stopper 42. The fitting portion 78 is fitted with the stopper 42 when the tip of the stopper 42 comes into contact with a predetermined pressure. In addition, in a state where the fitting portion 78 and the stopper 42 are fitted, the stopper 42 is detached from the fitting portion 78 when a predetermined stress is applied so as to remove the fitting.

  As shown in FIG. 15, when housing the virtual image display device 200 </ b> A, the reflection unit 4 is rotated to a position where the mirror 40 is substantially parallel to the base unit 3. Thereby, when not using virtual image display device 200A, head clearance can be secured suitably.

  On the other hand, when using the virtual image display device 200A, the reflection unit 4 is rotated counterclockwise by a predetermined angle from the state of FIG. Thereby, as shown in FIG. 16, the mirror 40 is fixed at a position facing the display 110 and reflecting the light of the display 110 to the combiner 5. As described above, the virtual image display device 200 </ b> A can cause the display light of the portable terminal 100 installed substantially parallel to the base unit 3 to be incident on the combiner 5 and display the virtual image Iv to the user.

  As shown in FIG. 16, the virtual image display device 200 </ b> A configures the guide image Im at the eye point Pe by reflecting the guide image Im with the mirror 40 and then reflecting the reflected light with the combiner 5. Make light incident. Therefore, in this case, unlike the case of the virtual image display devices 200 of the first to fourth embodiments, the control unit 17 does not need to reverse the guide image Im in advance and display it on the display 110. In this case, the type information Ik of the short-range wireless communication tag 6 (not shown) includes information indicating that there is no need to invert the guide image Im, and the control unit 17 of the mobile terminal 100 uses the type information Ik. The guide image Im is displayed on the display 110 without being horizontally reversed.

  Next, a case where the user operates the mobile terminal 100 with the mobile terminal 100 mounted on the mobile terminal holding unit 7A will be described with reference to FIGS.

  FIG. 17A shows a side view of the virtual image display device 200A when the reflecting section 4 is rotated about 90 degrees counterclockwise from the state of FIG. In this case, as shown in FIG. 17A, the stopper 42 is in contact with the fitting portion 78, and the fitting portion 78 and the stopper 42 are fitted. Thereby, the reflection part 4 and the portable terminal holding | maintenance part 7A will be in the state which can rotate interlockingly.

  FIG. 17B shows a side view of the virtual image display device 200A after the reflecting unit 4 and the portable terminal holding unit 7A are rotated about 45 degrees counterclockwise from the state of FIG. 17A. In this case, since the fitting portion 78 and the stopper 42 are fitted, the reflecting portion 4 and the portable terminal holding portion 7A are rotated by the same angle from the state of FIG. In the state of FIG. 17B, the portable terminal holding portion 7A is locked with respect to the support portion 38 of the base portion 3. Therefore, in this case, the user can preferably operate the mobile terminal 100 while viewing the display 110 in front.

  In the fifth embodiment, considering that the mobile terminal 100 is placed directly under the ceiling 28, the virtual image display device 200A includes a GPS receiver, and the measured information is transmitted to the mobile terminal 100 by wireless communication. You may send it. Thereby, even if it is a case where the GPS receiving part 15 of the portable terminal 100 cannot measure, the information of the present position can be suitably acquired by the portable terminal 100. As an example, a receiving antenna that receives radio waves from a GPS satellite may be arranged on a dashboard of a vehicle or the like, and may be connected to a GPS receiver of the virtual image display device 200A by a cable. The virtual image display device 200A may include various sensors such as a gyro, an acceleration sensor, and a distance sensor in addition to the GPS receiver, and may be capable of independent positioning. Further, the virtual image display device 200A may be able to acquire various vehicle information such as vehicle speed pulses from the vehicle. These forms are not limited to the fifth embodiment, and are effective in the first to fourth embodiments. The virtual image display device 200 can cause the mobile terminal 100 to suitably perform route guidance and the like by transmitting the acquired information to the mobile terminal 100.

<Modification>
Hereinafter, each modification suitable for the first to fifth embodiments will be described. These modifications can be applied to the above-described embodiments in any combination.

(Modification 1)
In the first to fourth embodiments, the control unit 17 further determines whether the display 110 is in the state directed toward the combiner 5 or the state directed toward the eye point Pe. Based on the guide image Im, it is preferable to switch between left and right inversion and non-inversion. Specifically, the control unit 17 reverses the guide image Im in the horizontal direction in the state of FIG. 4 in which the display 110 is directed to the combiner 5, and guides in the state of FIG. 6 in which the display 110 is directed to the eye point Pe. The image Im is not reversed.

  Here, a specific example of the method for determining the orientation of the display 110 will be described. Here, a case where the tilt detection unit 16 is an acceleration sensor capable of detecting the acceleration in the thickness direction of the mobile terminal 100 will be described.

  First, the control unit 17 monitors the output of the inclination detection unit 16 when determining that the vehicle Ve is accelerating based on the output of the GPS reception unit 15. Specifically, the control unit 17 recognizes that the vehicle Ve is moving forward when the vehicle Ve is moving at a predetermined speed (for example, 20 km / h) or more, and monitors the rate of change in the speed of the vehicle Ve. Thus, when it is determined that the vehicle is accelerating in the forward direction, the output of the inclination detector 16 is monitored. Then, the control unit 17 determines whether the acceleration indicated by the output of the tilt detection unit 16 is the direction of the display 110 or the direction of the back surface 130. And the control part 17 determines with the display 110 being the state which was orient | assigned to the combiner 5, when the acceleration which the output of the inclination detection part 16 shows is the acceleration which makes the direction of the display 110 positive. On the other hand, the control unit 17 determines that the display 110 is directed toward the eye point Pe when the acceleration indicated by the output of the tilt detection unit 16 is an acceleration with the direction of the display 110 being negative. Similarly, when it is determined that the vehicle Ve is decelerating in the forward direction, the control unit 17 indicates that the acceleration indicated by the output of the tilt detection unit 16 is an acceleration in which the direction of the display 110 is negative. In this case, it can be determined that the display 110 is directed to the combiner 5. The control unit 17 once determines the orientation of the display 110 described above, based on the output of the tilt detection unit 16 until it detects that the mobile terminal 100 is removed from the mobile terminal holding unit 7. Whether or not the orientation of the display 110 has been switched may be recognized by determining whether or not the screen is reversed horizontally.

  In addition to the specific example described above, the control unit 17 determines whether or not the user's face is reflected in an image generated by a camera (not shown) included in the mobile terminal 100, and the user's face is reflected in the image. In this case, it may be determined that the user faces the surface of the mobile terminal 100 provided with the camera. For example, when the camera 17 is provided on the display 110 side of the mobile terminal 100 and the user's face is image-recognized, the control unit 17 recognizes that the display 110 is directed to the eye point Pe. The control unit 17 may authenticate the presence / absence of the face in the image and the user's face using various known face recognition techniques. Also by this, the control part 17 can determine the direction of the display 110 suitably.

  As described above, in the present modification, the control unit 17 switches the guide image Im between the left and right direction inversion and non-inversion, so that the user can keep the mobile terminal 100 attached to the virtual image display device 200 while the mobile terminal 100 is attached. Even in the case of operation, an image can be appropriately displayed on the display 110.

(Modification 2)
In the first example, the control unit 17 detects that the mobile terminal 100 is attached to the mobile terminal holding unit 7 by receiving a radio signal including the type information Ik from the short-range wireless communication tag 6. Instead of this, or in addition to this, the control unit 17 is executing a predetermined navigation application for displaying the guide image Im, and the portable terminal 100 is being charged. The terminal 100 may be recognized as being attached to the portable terminal holding unit 7 and the guidance image Im may be reversed.

  FIG. 18 shows a side view of a virtual image display device 200B according to this modification. As illustrated in FIG. 18, the virtual image display device 200 </ b> B includes a charging unit 78 and a cable 79. The charging unit 78 is provided on the back surface of the holder 75 and receives power from a cable 79 connected to a cigar charger or the like to charge the mobile terminal 100. The charging unit 78 may be a wireless power feeder that complies with, for example, the Qi standard. Alternatively, a power supply connector to the mobile terminal 100 may be used instead of the wireless power supply. Note that the short-range wireless communication tag 6 (not shown) is disposed at a position where the mobile terminal 100 can communicate with the communication unit 14 of the mobile terminal 100 in a state where the mobile terminal 100 is attached to the mobile terminal holding unit 7A.

  In the aspect of FIG. 18, the mobile terminal 100 is charged when placed on the virtual image display device 200B. Accordingly, when the control unit 17 is executing a predetermined navigation application for displaying the guide image Im and the mobile terminal 100 is being charged, the mobile terminal 100 is attached to the mobile terminal holding unit 7. It can be suitably determined that it is present.

(Modification 3)
The combiner 5 may have a light shielding plate at a position that blocks external light from the direction in which the virtual image Iv is visually recognized by the user. Thereby, even if ambient external light is strong, the fall of the visibility of the virtual image Iv is suppressed suitably.

  FIG. 19 shows a side view of a virtual image display device 200C according to this modification. As illustrated in FIG. 19, the virtual image display device 200 </ b> C is provided with a light shielding plate 50 so as to cover a surface opposite to the reflective surface of the combiner 5. The light shielding plate 50 blocks all or part of the light incident on the combiner 5 from the direction in which the virtual image Iv is visually recognized by the user. Thereby, the virtual image display device 200 </ b> C can allow the user to visually recognize the virtual image Iv even when the luminance of the guide image Im is relatively low with respect to external light. In particular, since the virtual image display systems according to the first to fifth embodiments use the guide image Im displayed on the display 110 of the mobile terminal 100 as an intermediate image, it is difficult to ensure sufficient luminance. Therefore, according to this modification, the virtual image Iv can be suitably viewed by the user.

  The light shielding plate 50 may be openable and closable with respect to the combiner 5. In this case, for example, the light shielding plate 50 can freely rotate in a range from the position in FIG. 19 to a position along the arm 8, and is placed at a position along the arm 8 when not in use. Preferably, the control unit 17 detects that the light shielding plate 50 is closed with respect to the combiner 5 based on an output from a sensor (not shown) that detects the open / close state of the light shielding plate 50 with respect to the combiner 5. In this case, the brightness of the guide image Im may be lowered. Thereby, the power consumption of the portable terminal 100 can be suppressed suitably. More preferably, the light shielding plate 50 can be opened and closed based on a control signal transmitted from the control unit 17, and the control unit 17 shields the light when the remaining charge of the battery of the mobile terminal 100 becomes a predetermined amount or less. A control signal may be transmitted to the light shielding plate 50 so that the plate 50 is closed with respect to the combiner 5. Thereby, when the portable terminal 100 is insufficiently charged, the power consumption of the portable terminal 100 can be suitably suppressed.

(Modification 4)
In the description of FIG. 4, the installation unit 70 of the mobile terminal holding unit 7 may be slidable in the X-axis direction with respect to the base unit 3. In this case, for example, the base 3 is provided with a rail for the installation unit 70 to slide, and the installation unit 70 is slidably fitted to the rail. Thus, since the portable terminal holding part 7 has a configuration that can slide in the X-axis direction, the user can suitably adjust the head clearance, and the distance between the display 110 and the combiner 5 can be suitably adjusted. Can be adjusted.

(Modification 5)
The virtual image display device 200 was attached to the sun visor 29. However, the mounting position of the virtual image display device 200 to which the present invention is applicable is not limited to this. Instead, the virtual image display device 200 may be installed on a dashboard.

  FIG. 20 shows a side view of the virtual image display device 200D when installed on the dashboard. In FIG. 20, the virtual image display device 200 </ b> D has a configuration in which the virtual image display device 200 except the clip unit 9 of the first embodiment is vertically inverted. The base part 3 is fixed on the dashboard. And the portable terminal 100 is mounted in the portable terminal holding | maintenance part 7 of virtual image display apparatus 200D, and functions as a light source of a virtual image display system. Thus, even if it is an aspect installed in a dashboard, virtual image display device 200D can make a user visually recognize virtual image Iv based on guidance image Im which display 110 of personal digital assistant 100 outputted. it can.

  In another example, the virtual image display device 200 may be attached to the ceiling 28 instead of the sun visor 29. In this case, for example, the virtual image display device 200 has, on the upper surface of the base portion 3, a member that fits into an attachment hole (not shown) provided in the ceiling 28 for installing the sun visor 29 instead of the clip portion 9.

(Modification 7)
The virtual image display device 200 may include a reflecting mirror (not shown) that does not transmit external light instead of the combiner 5. In this case, even if the brightness of the guide image Im is relatively low with respect to outside light, the virtual image Iv can be suitably viewed by the user.

(Modification 8)
In the first to fourth embodiments, the clip portion 9 of the virtual image display device 200 is attached to the base portion 3. Instead of this, the clip portion 9 and the base portion 3 may be connected by a rotatable connecting member.

  FIG. 21 is a side view of the virtual image display device 200 according to this modification. As shown in FIG. 21, the clip portion 9 is connected to a ball link 35 provided on the base portion 3. The ball link 35 holds the clip portion 9 rotatably with respect to the base portion 3. The ball link 35 is an example of the “connecting member” in the present invention. According to such a configuration, even when the virtual image display device 200 is attached to a vehicle in which the sun visor 29 is tilted from the horizontal, the combiner 5 is tilted by rotating the base unit 3 with respect to the clip unit 9. It can install suitably, without.

  In another example, in order to install the sun visor 29 of the modified example 5, the member that fits into the mounting hole provided in the ceiling 28 and the base portion 3 may be connected by a rotatable connecting member.

DESCRIPTION OF SYMBOLS 11 Output part 12 Input part 13 Memory | storage part 14 Communication part 15 Tilt detection part 16 GPS receiving part 17 Control part 100 Portable terminal 110 Display 120 Touch panel 200, 200A-200D Virtual image display apparatus

Claims (1)

(I) holding means for detachably holding a portable terminal having a display surface for displaying an image; and (ii) reflecting light constituting the image emitted from the display surface and observing the image as a virtual image An optical member to be visually recognized by a person, and a main body portion including:
Attachment means that can be attached to a part of the vehicle;
A connecting member that rotatably connects the main body to the attachment means;
A virtual image display device comprising:

Images