Aerial floating image display apparatus

1 . An aerial floating image display apparatus comprising:

a display apparatus configured to generate an image;

a retroreflector configured to reflect image light from the display apparatus to form an aerial floating image; and

an imager placed on a far side of the aerial floating image relative to a user of the aerial floating image display apparatus and on an opposite side of the aerial floating image relative to the user, and configured to capture an image of the user from a back side of the aerial floating image and having an imaging area overlapping with a position of an optical image of the aerial floating image,

wherein, if a plurality of persons appear in a captured image captured from the back side of the aerial floating image by the imager placed on the far side of the aerial floating image relative to the user, the aerial floating image display apparatus displays information for notifying the user of being peeked by including the information in the aerial floating image, and

wherein generating the captured image by the imager is performed without passing through any optical elements disposed in an optical path of image light from the display apparatus to the aerial floating image.

2 . The aerial floating image display apparatus according to claim 1 ,

wherein, if a plurality of persons appear in a captured image after the information is displayed, the aerial floating image display apparatus displays, as the aerial floating image, information for allowing the user to select whether or not to move to a menu screen.

3 . The aerial floating image display apparatus according to claim 2 ,

wherein, if the user selects not to move to the menu screen, an operation by the user on the aerial floating image is continued.

4 . The aerial floating image display apparatus according to claim 1 , comprising:

a spatial operation detection sensor configured to detect an operation by the user on the aerial floating image,

wherein, if the aerial floating image display apparatus detects the user based on the captured image and the spatial operation detection sensor does not detect the operation of the user, the aerial floating image display apparatus displays, as the aerial floating image, guidance information for notifying the user of an operation status.

5 . The aerial floating image display apparatus according to claim 4 ,

wherein, if the operation by the user is not detected after the guidance information is displayed, the aerial floating image display apparatus displays, as the aerial floating image, guidance information for allowing the user to select whether or not to move to a menu screen.

6 . The aerial floating image display apparatus according to claim 4 ,

wherein, if the user is simultaneously touching a plurality of objects included in the aerial floating image, reception of the operation by the user is stopped.

7 . The aerial floating image display apparatus according to claim 4 ,

wherein, if a plurality of persons appear in the captured image, reception of the operation by the user is stopped.

8 . The aerial floating image display apparatus according to claim 4 ,

wherein, if the aerial floating image is not displayed at a brightness with which the user can recognize the aerial floating image, reception of the operation by the user is stopped.

9 . The aerial floating image display apparatus according to claim 4 ,

wherein, if a temperature of the aerial floating image display apparatus rises to a predetermined threshold temperature or higher, reception of the operation by the user is stopped.

10 . The aerial floating image display apparatus according to claim 1 , comprising:

an illuminance sensor configured to detect a brightness of a surrounding environment,

wherein the aerial floating image display apparatus adjusts luminance of an aerial floating image based on the brightness of the surrounding environment detected by the illuminance sensor.

11 . The aerial floating image display apparatus according to claim 1 , comprising:

a human sensor configured to detect a person,

wherein the aerial floating image display apparatus starts displaying an aerial floating image when the human sensor has detected a person.

12 . An aerial floating image display apparatus comprising:

a display apparatus configured to generate an image;

a retroreflector configured to reflect image light from the display apparatus to form an aerial floating image; and

an imager placed on an opposite side of the aerial floating image relative to the user, and configured to capture an image of the user from a back side of the aerial floating image and having an imaging area overlapping with a position of an optical image of the aerial floating image,

wherein, if another person in addition to the user appears in a captured image captured from the back side of the aerial floating image by the imager, the aerial floating image display apparatus displays information for notifying the user of the presence of the another person by including the information in the aerial floating image, and

wherein generating the captured image by the imager is performed without passing through any optical elements disposed in an optical path of image light from the display apparatus to the aerial floating image.

13 . The aerial floating image display apparatus according to claim 12 , wherein the information indicates that an operation by the user can be peeked at by the another person.

14 . The aerial floating image display apparatus according to claim 12 ,

wherein, if the another person in addition to the user appears in the captured image, the aerial floating image display apparatus displays information for allowing the user to select whether or not to move to a menu screen.

15 . The aerial floating image display apparatus according to claim 14 ,

wherein, if the user selects not to move to the menu screen, an operation by the user on the aerial floating image is continued.

16 . The aerial floating image display apparatus according to claim 12 , comprising:

a spatial operation detection sensor configured to detect an operation by the user on the aerial floating image,

wherein, if the aerial floating image display apparatus detects the user based on the captured image and the spatial operation detection sensor does not detect the operation of the user, the aerial floating image display apparatus displays, as the aerial floating image, guidance information for notifying the user of an operation status.

17 . The aerial floating image display apparatus according to claim 16 ,

wherein, if the operation by the user is not detected after the guidance information is displayed, the aerial floating image display apparatus displays guidance information for allowing the user to select whether or not to move to a menu screen.

18 . The aerial floating image display apparatus according to claim 16 ,

wherein, if the user is simultaneously touching a plurality of objects included in the aerial floating image, reception of the operation by the user is stopped.

19 . The aerial floating image display apparatus according to claim 16 ,

wherein, if the another person in addition to the user appears in the captured image, reception of the operation by the user is stopped.

20 . The aerial floating image display apparatus according to claim 16 ,

wherein, if the aerial floating image is not displayed at a brightness with which the user can recognize the aerial floating image, reception of the operation by the user is stopped.