Display system and method for an aircraft

1. A display system for a cockpit of an aircraft, comprising:

a display device configured to be secured to a user's head in the cockpit of the aircraft;

a display computer configured to control a display of information on the display device;

at least one sensor configured to detect an orientation and a position of the head of the user; and

a database comprising information on an interior geometry of the cockpit;

the display computer being configured:

to acquire information on the orientation and information on the position of the head of the user, provided by the at least one sensor;

to acquire, from the database, information on the geometry of the cockpit;

to determine a distance between the head of the user and an element of the cockpit intersecting with a direction corresponding to a current orientation of the head of the user, when the user looks inside the cockpit, according to the information on the orientation and the information on the position of the head of the user and information on the geometry of the cockpit;

to control a virtual display distance of the display device, corresponding to the distance between the head of the user and the element of the cockpit, the virtual display distance being defined as a display distance perceived by the user;

to control a virtual display distance of the display device so that the virtual display distance corresponds to infinity when the direction corresponding to the current orientation of the head of the user intersects with a windscreen of the cockpit of the aircraft.

2. The system according to claim 1 , wherein the display computer is configured:

to determine the direction corresponding to a current orientation of the head of the user according to the information on the orientation and the information on the position of the head of the user;

to determine a surface of the element of the cockpit on the basis of information on the geometry of the cockpit;

to determine a point of intersection between the surface of the element of the cockpit and the direction corresponding to the current orientation of the head of the user;

to determine the distance between the head of the user and the element of the cockpit as corresponding to a calculated distance between the head of the user and said point of intersection.

3. The system according to claim 1 , wherein the display device includes an optical device that can be controlled so as to modify a collimation distance of the display device.

4. The system according to claim 1 , wherein the display device is a binocular display device arranged to display a first image corresponding to a right eye of the user and a second image corresponding to a left eye of the user and the display calculator is configured to produce the first image and the second image such that the information displayed on the display device is perceived by the user as being displayed at the virtual display distance.

5. The system according to claim 1 , wherein the display device includes a holographic display and the display computer is configured:

to produce a holographic image in which the information to be displayed is positioned at the virtual display distance with respect to the head of the user when the image is displayed by the holographic display;

to control the display of the holographic image on the holographic display.

6. A display method in a cockpit of an aircraft, the aircraft including a display system comprising:

a display device configured to be secured to a user's head in the cockpit of the aircraft;

a display computer configured to control a display of information on the display device;

at least one sensor for an orientation and a position of the head of the user; and

a database comprising information on an interior geometry of the cockpit;

the method including the following steps implemented by the display computer:

acquiring information on the orientation and information on the position of the head of the user, provided by the at least one sensor;

acquiring, from the database, information on the interior geometry of the cockpit;

determining a distance between the head of the user and an element of the cockpit intersecting with a direction corresponding to a current orientation of the head of the user, when the user looks inside the cockpit, according to the information on the orientation and the information on the position of the head of the user and information on the interior geometry of the cockpit;

controlling a virtual display distance of the display device, corresponding to the distance between the head of the user and the element of the cockpit, the virtual display distance being defined as a display distance perceived by the user;

controlling the virtual display distance of the display device so that the virtual display distance corresponds to infinity when the direction corresponding to the current orientation of the head of the user intersects with a windscreen of the cockpit of the aircraft.

7. An aircraft including a display system according to claim 1 .