Abstract: A display device includes a support and first and second conductive electrical power supply elements, the first conductive element being arranged on the support. The display device also includes LED modules, each including at least one LED and two electrical power supply pads that are arranged on two opposite faces, respectively, of the LED module, one of which corresponds to an emissive face of the LED. The electrical power supply pads of each LED module are connected to the first and second conductive electrical power supply elements, respectively, and the connection area of an electrical power supply pad of an LED module for connection with the first conductive electrical power supply element is smaller than a receiving area of the first conductive element corresponding to the area of the first conductive element in a parallel plane to the connection areas of the power supply pads of the LED modules.

Abstract: The invention relates to a diffuser 3 intended to receive the light transmitted by a visible light source 1 comprising a transmission layer 10 and a diffusion layer 22 intended to diffuse said light, the diffuser being characterised in that the diffusion layer comprises a plurality of metal nanostructures 200, each of these metal nanostructures having, in projection in a main extension plane xy, a longitudinal dimension L along a longitudinal axis and a transverse dimension l along a transverse axis, said longitudinal and transverse dimensions being different to one another and the transverse dimension l being less than 650 nm, and in that these metal nanostructures are further distributed within the diffusion layer such that at least two adjacent metal nanostructures are respectively oriented along two non-parallel longitudinal axes. The invention also relates to a method for manufacturing such a diffuser, and a display system comprising such a diffuser.

Abstract: A papillary print sensor is provided, including a light emitting device configured to emit light radiation towards the sensor; and a matrix photodetector configured to be sensitive to at least part of an emission spectrum of the light emitting device, the light emitting device and the matrix photodetector being distributed together in and/or above a same semiconducting substrate, the light emitting device being composed of at least one gallium nitride light emitting diode (LED) with a series of through openings.

Abstract: The invention relates to an image projection system (200) configured to implement colour projection comprising: a first matrix device (210) with an emissive display for transmitting a first and a second colour component of a colour image, wherein each pixel is adapted to transmit at the wavelengths associated with the first colour component and the wavelengths associated with the second colour component; and a second matrix device (220) with an emissive display for transmitting a third colour component (221) of the colour image. The colour image projector according to the invention offers both good energy efficiency and a small footprint.

Abstract: A display device including a first integrated circuit including: an assembly of light-emitting diodes, each diode including a vertical stack of a first semiconductor layer of a first conductivity type and of a second semiconductor layer of a second conductivity type; and on the side of a surface of the first circuit opposite to the first semiconductor layer, a connection structure including a dielectric layer having a plurality of identical or similar connection pads, regularly distributed across the entire surface of the first circuit, arranged therein, each diode having a first electrode in contact with at least one pad of the connection structure, and a second electrode in contact with a plurality of pads of the connection structure at the periphery of the plurality of diodes.

Abstract: A monolithic display device including a plurality of first pixels capable of emitting light in a first wavelength range, and a plurality of second pixels capable of emitting light in a second wavelength range, the first pixels each including a gallium nitride light-emitting diode, and the second pixels each including an organic light-emitting diode.

Abstract: A method of manufacturing an optoelectronic device, including the successive steps of: a) transferring, onto a surface of a control integrated circuit including a plurality of metal connection pads, an active diode stack including at least first and second doped semiconductor layers of opposite conductivity types, so that the second layer of the stack is electrically connected to the metal pads of the control circuit; and b) forming in the active stack trenches delimiting a plurality of diodes connected to different metal pads of the control circuit.

Abstract: A papillary print sensor comprising in superposition a contact surface to which the print to be imaged is intended to be applied, an array optical sensor and illuminating device. The illuminating device is arranged between the contact surface and a detecting surface of the array optical sensor, and consists of a plurality of organic light-emitting diodes, referred to as OLEDs. Each OLED extends uninterruptedly over more than a third of a width (L1) of the detecting surface, and the OLEDs extend together along one or two series of patterns that are parallel to one another and distributed along the length (L2) of the detecting surface. This configuration of the OLEDs allows in particular the transistors for controlling the OLEDs to be placed off the detecting surface (125).

Abstract: The invention relates to an image projection system (200) configured to implement colour projection comprising: a first matrix device (210) with an emissive display for transmitting a first and a second colour component of a colour image, wherein each pixel is adapted to transmit at the wavelengths associated with the first colour component and the wavelengths associated with the second colour component; and a second matrix device (220) with an emissive display for transmitting a third colour component (221) of the colour image. The colour image projector according to the invention offers both good energy efficiency and a small footprint.

Abstract: An optoelectronic device including an active area capable of supplying an electromagnetic radiation and sandwiched between first and second semiconductor layers, the first semiconductor layer delimiting a surface and including a first portion in contact with the active area and delimiting a first part of the surface and extending in a second portion delimiting a second part of the surface, the second portion forming a single-mode waveguide, the optoelectronic device including an opaque portion reflective for the electromagnetic radiation covering the first part and including a diffraction grating on the second part capable of extracting the electromagnetic radiation from the second portion.

Abstract: An optoelectronic device including an active area capable of supplying an electromagnetic radiation and sandwiched between first and second semiconductor layers, the first semiconductor layer delimiting a surface, the optoelectronic device further including a diffraction grating capable of extracting the electromagnetic radiation from the first semiconductor layer, the diffraction grating including holes extending in the first semiconductor layer from said surface, the width of the holes measured in a plane parallel to said surface increasing from a central portion of the diffraction grating to a peripheral portion of the diffraction grating.

Abstract: A monolithic display device including a plurality of first pixels capable of emitting light in a first wavelength range, and a plurality of second pixels capable of emitting light in a second wavelength range, the first pixels each including a gallium nitride light-emitting diode, and the second pixels each including an organic light-emitting diode.

Abstract: Optical imaging device comprising: an array of substantially point light sources, an array of photo-detectors interlaced with the array of light sources, an optical medium of thickness greater than the pitch of the photo-detectors and forming capture and detection surfaces, means for successively switching on and off each of a part of the light sources and reading a part of the photo-detectors receiving rays coming from the switched on source and having undergone reflection against the detection surface while forming an angle of incidence estimated as a function of the optical medium and the element to image.

Abstract: A method of manufacturing an optoelectronic device, including the successive steps of: a) transferring, onto a surface of a control integrated circuit including a plurality of metal connection pads, an active diode stack including at least first and second doped semiconductor layers of opposite conductivity types, so that the second layer of the stack is electrically connected to the metal pads of the control circuit; and b) forming in the active stack trenches delimiting a plurality of diodes connected to different metal pads of the control circuit.

Abstract: A system for projecting images, configured to implement a sequential type colour projection. The system includes an emissive matrix display device; and a wavelength conversion coloration wheel. The coloration wheel includes a transparent zone, and a first photoluminescent zone configured to absorb a blue light beam and to emit in response a beam including a green component and a red component. The system further includes a selection device for blocking alternately the green component or the red component, including at least one dichroic mirror.

Abstract: A papillary print sensor comprising in superposition a contact surface to which the print to be imaged is intended to be applied, an array optical sensor and illuminating device. The illuminating device is arranged between the contact surface and a detecting surface of the array optical sensor, and consists of a plurality of organic light-emitting diodes, referred to as OLEDs. Each OLED extends uninterruptedly over more than a third of a width (L1) of the detecting surface, and the OLEDs extend together along one or two series of patterns that are parallel to one another and distributed along the length (L2) of the detecting surface. This configuration of the OLEDs allows in particular the transistors for controlling the OLEDs to be placed off the detecting surface (125).

Abstract: Optical imaging device comprising: an array of substantially point light sources, an array of photo-detectors interlaced with the array of light sources, an optical medium of thickness greater than the pitch of the photo-detectors and forming capture and detection surfaces, means for successively switching on and off each of a part of the light sources and reading a part of the photo-detectors receiving rays coming from the switched on source and having undergone reflection against the detection surface while forming an angle of incidence estimated as a function of the optical medium and the element to image.

Abstract: A papillary print sensor is provided, including a light emitting device configured to emit light radiation towards the sensor; and a matrix photodetector configured to be sensitive to at least part of an emission spectrum of the light emitting device, the light emitting device and the matrix photodetector being distributed together in and/or above a same semiconducting substrate, the light emitting device being composed of at least one gallium nitride light emitting diode (LED) with a series of through openings.

Abstract: The invention relates to a device for observing a sample, including: a light source able to emit an incident light wave that propagates towards a holder able to receive the sample; and an image sensor able to detect a light wave transmitted by the sample when the latter is placed between the light source and the image sensor. The device is characterized in that the light source includes a light-emitting diode that is what is called micron-sized, a light-emission surface of which has a diameter or a largest diagonal smaller than 500 ?m. The invention also relates to a method for observing a sample using such a device.

Abstract: The invention relates to a method for manufacturing a multilayer structure on a first substrate made of a first material having a Young's modulus Ev, the method including: using a second substrate having a planar surface covered by the multilayer structure, the second substrate being made of a second material having a Young's modulus Es that is different from the Young's modulus Ev, and a thickness es, the mean Young's modulus Es over thickness es, measured in any direction in a plane parallel to said surface, being constant, plus or minus 10%; bonding the first substrate to the multilayer structure; and removing the second substrate.