Dual vision device and associated method

1 . A dual vision device designed to generate a second vision, independent of a direct vision, in addition to the direct vision of a user, the second vision being located in an upper part of a field of vision of the user so that the user has access to the second vision only by looking upwards, and otherwise has access to their own direct vision, the dual vision device comprising:

a support for a display assembly;

an adjustment unit configured to set and adapt the support to a head of the user so that the display assembly carried by the support is viewable only in the upper part of the field of vision of the user when the user looks upwards; and

the display assembly carried by the support, the display assembly comprising two display units configured to generate the second vision in the upper part of the field of vision of the user, each display unit of said two display units comprising an eyepiece and a screen chosen so that each display unit forms an image viewable clearly by a distinct eye of the user under the following conditions:

the support is inclined so that the image formed by each display unit is viewable only in the upper part of the field of vision of the user when the user looks upwards; and

a distance between eyes of the user and an entrance of the eyepieces is greater than or equal to a predetermined distance, the predetermined distance being chosen so as to enable an insertion of glasses between the eyes of the user and said two display units.

2 . The dual vision device according to claim 1 , wherein the predetermined distance is between 20 millimeters and 28 millimeters.

3 . The dual vision device according to claim 1 , wherein the predetermined distance is between 22 millimeters and 25 millimeters.

4 . The dual vision device according to claim 1 , wherein the screen of each display unit has a size chosen so that the image formed by the respective display unit is readable without the user having to move their eyes laterally to view edges of the image.

5 . The dual vision device according to claim 1 , wherein each eyepiece is formed of a set of lenses placed together, the surface of the set of lenses at the entrance of the eyepiece being substantially flat.

6 . The dual vision device according to claim 5 , wherein each eyepiece is formed of a set of at least four lenses placed together.

7 . The dual vision device according to claim 1 , wherein each display unit comprises a frame in which the screen and the eyepiece are inserted, the frame having a parallelepiped shape with a conical base at the entrance of the eyepiece.

8 . The dual vision device according to claim 1 , wherein each display unit comprises a frame in which the screen and the eyepiece are inserted, the frame having a border, at the entrance of the eyepiece, whose thickness is less than or equal to 2 millimeters.

9 . The dual vision device according to claim 8 , wherein the thickness of the border is less than or equal to 1.4 millimeters.

10 . The dual vision device according to claim 1 , wherein each display unit comprises a frame in which the screen and the eyepiece are inserted, the frame having a dioptric adjustment mechanism enabling the user to adjust a focus of each display unit.

11 . The dual vision device according to claim 1 , wherein the support comprises a closure plate with two housings in which the two display units are received, the display assembly comprising an interpupillary adjustment mechanism mounted on the closure plate and designed to synchronize movement of the two display units, the interpupillary adjustment mechanism comprising a yoke on which two rods are mounted and a locking knob for a rotation of the yoke, each rod being fixed to a distinct display unit enabling the synchronous movement of each display unit when the locking knob is in an unlocked position.

12 . The dual vision device according to claim 11 , wherein the two display units also comprise for each housing two tabs on either side of the closure plate designed to cover a space caused by the interpupillary adjustment mechanism to prevent an entry of light and dust.

13 . The dual vision device according to claim 1 , wherein at least one display unit of said two display units comprises an inner portion located inside the support and a protruding portion projecting from the support, and wherein the screen is received inside the inner portion, the eyepiece being received inside the protruding portion.

14 . The dual vision device according to claim 13 , wherein the protruding portion of the at least one display unit has a depth less or equal to 4 millimeters.

15 . A method for generating a second vision, independent of a direct vision of a user, the second vision being located in an upper part of a field of vision of the user so that the user has access to the second vision by only looking upwards, and otherwise has access to their direct vision, the method being implemented by a dual vision device according to claim 1 , the method comprising:

fixing and adapting the support of the dual vision device to a head of the user so that the display assembly carried by the support is viewable only in the upper part of the field of vision of the user when the user looks upwards; and

visualizing by the user of the second vision provided by the dual vision device in the upper part of the field of vision of the user when the user looks upwards, and of their direct vision otherwise.