Screen with magnetic object locating

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 Ne magnetometers furthest from this estimated position, where Ni+Ne 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.

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 Ni magnetometers closest to or the Ne magnetometers furthest from this estimated position, where Ni+Ne 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.