Aledia

Frédéric Mercier

Ivan-Christophe Robin

Xavier Hugon

Matthieu Charbonnier

Philippe Gilet

Frédéric Mayer

Erwan Dornel

Olivier Jeannin

Zine Bouhamri

Pamela Rueda Fonseca

David Gras

Philipe Gilet

Nicolas Joubert

Yves Salmon

A display block including an optoelectronic circuit including-light-emitting diodes of at least two display pixels and having a first surface of emission of the light radiations of the light-emitting diodes; and diffusing structures covering the optoelectronic circuit, each diffusing structure being in contact with a portion of the first emission surface and having a second surface of emission of the light radiations of the light-emitting diodes of one of the display pixels, the ratio of the sum of the areas of the second emission surfaces to the area of the first emission surface being greater than 2.

Display pixel comprising light-emitting diodes for a display screen

A method for protecting optoelectronic devices against electrostatic discharges. Each optoelectronic device includes an electronic circuit including at least one electronic component and one optoelectronic circuit bonded to the electronic circuit and including at last one optoelectronic component from among a light-emitting diode or a photodiode. The method includes forming of first and second wafers, one of the first or second wafer includes a plurality of copies of the electronic circuit and the other one of the first or second wafer including a plurality of copies of the optoelectronic circuit, the bonding of the first wafer to a support, the bonding of the second wafer to the first wafer, and the separation of the electronic devices from one another, wherein the first wafer and/or the second wafer comprises at least one system for protecting optoelectronic devices against electrostatic discharges.

Method for protecting an optoelectronic device from electrostatic discharges

A method of protecting optoelectronic devices against electrostatic discharges, each optoelectronic device comprising an optoelectronic circuit comprising at least one optoelectronic component from among a light-emitting diode or a photodiode. The method comprises forming a first wafer, comprising a plurality of copies of the optoelectronic circuit, bonding the first wafer to a support, separating the optoelectronic devices from one another, and removing from the support a plurality of optoelectronic devices from among said optoelectronic devices by means of a gripping system, wherein the gripping system comprises at least one system for protecting optoelectronic devices against electrostatic discharges.

Method for protecting an optoelectronic device against electrostatic discharges

A display pixel including a light-emitting diode, a circuit for driving the light-emitting diode, and first, second, third, and fourth conductive pads. The light-emitting diode is powered with a first voltage received between the first and second pads. The driver circuit controls the light-emitting diode based on first and second binary signals. The first signal is received between the third and second pads and alternates between a second voltage lower than the first voltage, and a third voltage, lower than the second voltage. The second signal is received between the fourth and second pads and alternates between the second voltage and the third voltage. The display pixel comprises a circuit for delivering a power supply voltage of the driver circuit, based on the first and second signals.

A display pixel including at least one light-emitting diode, a circuit for driving the light-emitting diode, and first, second, third, and fourth conductive pads. The driver circuit is powered with a first power supply voltage received between the first and second pads. The light-emitting diode is powered with a first binary signal, received between the third and second pads, and alternating between a second power supply voltage, greater than the first voltage, and a third voltage, smaller than the first voltage. The driver circuit is configured to determine a digital signal based on the values of a second binary signal on the fourth pad received during each of first pulses of the first binary signal at the third voltage and to control the light-emitting diode from the digital signal.

Light emitting diode display pixel

An optoelectronic device including an integrated circuit including light-emitting diodes, thin film transistors, and a stack of electrically-insulating layers, said stack being located between the light-emitting diodes and the transistors, said stack further including conductive elements, between and through said insulating layers, said conductive elements connecting at least some of the transistors to the light-emitting diodes.

Optoelectronic device

An image display system includes at least one user parameter analyser configured to determine at least one parameter associated with a user, an image display screen having luminous pixels, at least one graphics processing unit configured to process at least one first main image that can be displayed on the image display screen and that is representative of a first zone of a main scene. The system further includes at least one image buffer device configured to store at least the first main image, and a graphics controller configured to control a display of at least one first secondary image on the image display screen, the first secondary image having a first portion of the first main image included in the first main image and positioned within the first main image as a function of a first user parameter.

Image display system and control method

A device including a display screen including display pixels arranged in rows and in columns, including a first row and a first column. The device further includes a display screen control circuit configured to, in a first mode, start the display of a first image on the first row and on the first column and, in a second mode, start the display of a second image on one of the rows different from the first row and/or on one of the columns different from the first column.

Device comprising a display screen with low-consumption operating mode

An optoelectronic device including a support, at least a first conductive layer covering the support, display pixels including first and second opposite surfaces, bonded to the first conductive layer, each pixel including an electronic circuit including the first surface and a third surface opposite to the first surface, the first surface being bonded to the first conductive layer, and an optoelectronic circuit bonded to the third surface and including at least two light-emitting diodes, at least one of the electrodes of each light-emitting diode being connected to the electronic circuit by the third surface, the optoelectronic circuit further comprising photoluminescent blocks covering the light-emitting diodes and conductive or semiconductor walls surrounding the photoluminescent blocks, and at least one second conductive layer electrically coupled to at least one of the pixels.

Optoelectronic device comprising light-emitting diodes

optoelectronic circuit intended to receive a variable voltage containing an alternation of rising and falling phases. The optoelectronic circuit includes light-emitting diodes and a switching device capable of allowing or of interrupting the flowing of a current through each light-emitting diode. Each light-emitting diode is covered with a photoluminescent layer. The photoluminescent layer covering at least one of the light-emitting diodes includes at least one first luminophore having a first decay constant and at least one second luminophore having a second decay constant different from the first decay constant.

Optoelectronic circuit comprising light emitting diodes

An optoelectronic device, including: a support; at least one first electrically-conductive layer covering the support; display pixel circuits including first and second opposite surfaces bonded to the first electrically-conductive layer, each display pixel circuit including an electronic circuit including the first surface and a third surface opposite to the first surface, the first surface being bonded to the first electrically-conductive layer, and at least one optoelectronic circuit bonded to the third surface and including at least one light-emitting diode, at least one of the electrodes of the light-emitting diode being connected to the electronic circuit by the third surface; at least one second electrically-conductive layer covering the display pixel circuits and electrically coupled to the electronic circuits of the display pixel circuits on the side of the second surface.

A display screen including display circuits, each display circuit including a light-emitting diode, a controllable current source powering the light-emitting diode, and a control circuit capable of supplying a pulse-width modulated signal for controlling the current source from a periodic signal. The display screen further includes first electrodes coupled to the control circuits, a circuit for supplying a selection signal successively on each first electrode, and an oscillating circuit or oscillating circuits capable of supplying the periodic signals, the periodic signals being non-synchronous with the display circuit selection signals.

Display screen having light-emitting diodes

A method of controlling an optoelectronic device including display pixels arranged in rows and in columns. The optoelectronic device further includes first electrodes, each connected to the display pixels of at least one row, second electrodes, each connected to the display pixels of at least one column, and a circuit for controlling the first and second electrodes. The method includes, in a first phase, the activation of the display pixels connected to one of the first electrodes and to one of the second electrodes by the following steps, simultaneously carried out: taking one of the first electrodes to a first potential, the other first electrodes being maintained at a second potential smaller than the first potential; and taking one of the second electrodes to a third potential smaller than the second potential, the other second electrodes being maintained at a fourth potential greater than the third potential and smaller than the second potential.

An optoelectronic circuit including separate interconnected basic electronic circuits, each of which includes at least one light emitting diode and at least one integrated circuit chip that has a circuit for controlling the light emitting diode, the circuit being suitable for activating or deactivating the light emitting diode.

An optoelectronic circuit for receiving a variable voltage containing alternating increasing and decreasing phases, the optoelectronic circuit including a plurality of groups of light-emitting diodes and a switching device for allowing or interrupting the circulation of a current through each group, the switching device also being suitable for detecting whether said variable voltage is supplied by a dimmer.

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Saint Nicolas de Macherin, France

Frédéric Mercier