Screen with magnetic object locating

1. A screen comprising:

a transparent panel;

a photon-generating layer in order to form each luminous pixel visible through the transparent panel, the photon-generating layer being housed behind the transparent panel; and

a human/machine interface able to control the photon-generating layer in order to modify the display of an image by the screen, wherein the interface comprises:

a localizing device for localizing a movable permanent magnet able to be moved directly by hand by a human being in front of the panel, the localizing device comprising for this purpose:

a network of magnetometers comprising N tri-axis magnetometers mechanically connected to one another with no degree of freedom in order to maintain a known distance between each of these magnetometers, where N is a whole number higher than or equal to five; and

an electronic processing unit able to determine the position and/or orientation of the permanent magnet from the measurements of the magnetometers of this network; and

a unit able to control the photon-generating layer in order to modify the display depending on the position and/or orientation determined by the device for localizing; and

wherein the magnetometers of the network of magnetometers are arranged inside a strip that encircles the external periphery of the photon generating layer and none of the magnetometers of the network of magnetometers is placed in front of or behind the photon-generating layer in a direction perpendicular to the layer.

2. The screen as claimed in claim 1 , in which the number N is higher than or equal to sixteen.

3. The screen as claimed in claim 1 , in which the magnetometers are placed in a given plane and distributed in this plane so as to form a plurality of columns of magnetometers that are parallel to one another.

4. An assembly, comprising:

a screen according to claim 1 ; and

a movable permanent magnet able to be localized by the localizing device.

5. A method for controlling the display of a screen equipped with a transparent panel and with a photon-generating layer in order to form each luminous pixel visible through the transparent panel, the photon-generating layer being housed behind the transparent panel, wherein the method comprises:

a human being moving a movable permanent magnet directly by hand in front of the panel;

measuring the magnetic field generated or modified by the permanent magnet with a plurality of magnetometers of a network of magnetometers comprising N tri-axis magnetometers mechanically connected to one another with no degree of freedom in order to maintain a known distance between each of these magnetometers, where N is a whole number higher than or equal to five;

determining, with an electronic processing unit, the position and/or the orientation of the permanent magnet from the measurements of the magnetometers of this network; and

controlling the photon-generating layer in order to modify the display depending on the position and/or orientation determined by the electronic unit and

Wherein the step of determining includes:

a) estimating the position of the permanent magnet relative to the network of magnetometers;

b) calculating the distance between each magnetometer and the estimated position of the permanent magnet; then

c) eliminating the N, magnetometers closest to or the N e magnetometers furthest from this estimated position, where N i +N e is a positive whole number strictly lower than N;

d) measuring the magnetic field generated or modified by the permanent magnet with each non-eliminated magnetometer; and

e) determining the position and/or orientation of the permanent magnet from the measurements alone of the magnetometers that have not been eliminated.

6. The method as claimed in claim 5 , in which in the measuring step, the eliminated magnetometers are turned off.

7. A non-transitory data storage medium, containing program instructions for implementing a control method according to claim 5 when said instructions are executed by an electronic processor.

8. A screen comprising:

a transparent panel;

a photon-generating layer in order to form each luminous pixel visible through the transparent panel, the photon-generating layer being housed behind the transparent panel; and

a human/machine interface able to control the photon-generating layer in order to modify the display of an image by the screen, wherein the interface comprises:

a localizing device for localizing a movable permanent magnet able to be moved directly by hand by a human being in front of the panel, the localizing device comprising for this purpose:

a network of magnetometers comprising N tri-axis magnetometers mechanically connected to one another with no degree of freedom in order to maintain a known distance between each of these magnetometers, where N is a whole number higher than or equal to five; and

an electronic processing unit able to determine the position and/or orientation of the permanent magnet from the measurements of the magnetometers of this network; and

a unit able to control the photon-generating layer in order to modify the display depending on the position and/or orientation determined by the device for localizing; and

wherein the electronic unit includes a non-transitory computer-readable medium containing program instructions programmed to:

a) estimate the position of the permanent magnet relative to the network of magnetometers;

b) calculate the distance between each magnetometer and the estimated position of the permanent magnet; then

c) eliminate the N i magnetometers closest to or the N e magnetometers furthest from this estimated position, where N i +N e is a positive whole number strictly lower than N;

d) acquire the measurement of the magnetic field generated or modified by the permanent magnet taken by each non-eliminated magnetometer; and

e) determine the position or orientation of the permanent magnet from the measurements alone of the non-eliminated magnetometers.