Thales

Vincent Toraille

Hugues Lebrun

Jacques Bellon

Patrick Rocca

Nicolas Bensaou

Franck Jeulin

A method is provided of display of a dot-matrix digital image including controlling groups of three coloured elements, each element being of a different colour, each group forming one elementary element of a colour image, and carrying out anti-aliasing processing of the display. Each coloured element is a plano-convex assembly of a plurality of light-emitting diodes, each of the elements in a group being covered by a plate that is common to the diodes of the element and that scatters coloured light associated with the element, the anti-aliasing processing being carried out by applying commands for various light intensities to the light-emitting diodes inside a given element.

Electronic display device with anti-aliasing

A color display device includes a matrix of light sources, each light source comprising a single micro-light-emitting diode, the light sources being of three different colors, each color pixel of the matrix comprising three sources emitting in the three different colors. In the device, the matrix is formed by a group of elementary components of identical shape, each elementary component comprising at least two light-emitting diodes emitting in one of the three spectral bands—the shape of the light-emitting diodes being either a triangle, or a quadrilateral, or a pentagon—the elementary components being assembled in threes such that their respective diodes touch one another by one of their sides, the group formed by the three sources associated with the three diodes forming a color pixel.

Colour display device comprising a mosaic of tiles of light-emitting micro-diodes

A device for backlighting a display in day- or night-vision mode includes a light guide with a cuboid shape and having an output face, and a lateral input prism having three rectangular lateral faces, at least one of the rectangular lateral faces being optically coupled to the lateral input face, and another of the rectangular lateral faces being semi-reflective; a first plurality of light emitting diodes arranged on a first carrier and configured to emit light in a first direction orthogonal to the first carrier towards one of the rectangular lateral faces; a second plurality of light emitting diodes arranged on a second carrier and configured to emit light in a second direction orthogonal to the second carrier towards another of the rectangular lateral faces; and an optical filter configured to modify the light emitted by one of the first and second plurality of light emitting diodes suitable for use in night-vision equipment.

Display lighting device with light guide edgelit by LEDs coupled to triangular prism

A device for backlighting a liquid-crystal matrix array of a flat screen for viewing in day- or night-vision mode with NVIS compatibility includes a light guide GL which comprises a main cuboid plate shape PP assembled together with at least one right-angled triangular auxiliary prism PAwhich comprises at least one reflective face, and which is arranged together with the main plate to define, on the same lateral face of the plate, two distinct injection windows, one injection window Ifor a nighttime light source and one injection window Ifor a daytime light source. The nighttime light is injected into the plate, by reflection within or off the auxiliary prism in the direction of the respective injection window (I). The lateral face of the prism that directly receives the light emitted by the nighttime source may comprise an optical filter Fformed collectively over its surface by deposition of dielectric films.

Lighting device compatible with night-vision equipment with lateral injection windows for daytime and nighttime light

An optical encoder for which improved robustness is sought comprises: a movable part bearing a scattering zone and an absorbing zone, a light emitter that is positioned to emit light radiation in the direction of the movable part, a sensor that is sensitive to the light emitted by the emitter, the sensor being positioned to detect light radiation that is reflected by the scattering zone, the movement of the movable part making it possible to place either the scattering zone or the absorbing zone on an optical path between the emitter and the sensor, and an optical waveguide that is transparent to the light radiation and that is passed through by the optical path.

Robust optical encoder

A keyboard comprises: several keys operated by a user, the operating forming, for each key, a signal representative, a flat waveguide having a first and second external face for a wave of light to reflect between the faces, the first face of the waveguide comprising an altered zone so part of the wave leaves the waveguide via the altered zone to backlight the keyboard, for each key a plunger moved between two positions, one in contact with the first face and the other distant from the first face, contact of the plunger with the first face causing the reflection of the wave in the waveguide to be locally frustrated, associated with each of the plungers, a sensor arranged in an empty space delimited by the second face, the sensor associated with the plunger and configured to detect the frustration of the reflection, the sensor forming the representative signal.

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Moirans, France

Vincent Toraille