Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Bernard Aventurier

Tony Maindron

Salim Boutami

Umberto Rossini

Christophe Martinez

Yohan Desieres

Pierre Joly

Carole Pernel

Stéphane Getin

Julia Simon

Nicolas Michit

Henri Doyeux

Aurélien Suhm

Julia De Girolamo

François Levy

Audrey Sanchot

Jean-Yves Simon

Stéphane Altazin

Eva Serres

Paolo De Martino

The invention relates to a diffuserintended to be facing a light sourcecomprising a transmission layerand a diffusion layerintended to diffuse a light transmitted by the light source, the diffuser being characterised in that the diffusion layer comprises a plurality of metal structures, called metal nanostructures, having dimensions less than a wavelength of the light transmitted, said metal nanostructures having varied sizes and being distributed within the diffusion layer such that adjacent metal nanostructures have between them, varied distances and preferably less than the wavelength of the light transmitted. The invention also relates to a method for manufacturing such a diffuser, and a display system comprising such a diffuser.

Diffusive structure for light source

A method of manufacturing a primary mold for the forming of a retroreflective screen, the method including the steps of: a) forming, on the front surface of such a substrate, a layer of a material such that the first substrate is selectively etchable over said layer; and b) forming microrecesses from the rear surface of the first substrate by selective etching of the first substrate over said layer, each microrecess emerging on the rear surface of said layer and having a back parallel to the front surface of the first substrate and first and second lateral walls orthogonal to each other and orthogonal to the back the first and second lateral walls and the back of the microrecess joining at a same point and forming a trihedron.

Method of manufacturing a screen provided with retroreflective microstructures

A method of manufacturing a layer containing quantum dots, the layer including first regions where the quantum dots are active and second regions where the quantum dots are inactive, the method including: a) depositing on a support a first layer of a matrix containing quantum dots; b) depositing on the first layer a second resist layer; c) exposing the second layer to light through a mask delimiting the first and second regions, and then developing the resin of the second layer to remove the resin of the second layer opposite the second regions while keeping it opposite the first regions; and d) removing the resin of the second layer opposite the first regions without removing the first layer.

Method of manufacturing a layer containing quantum dots

The invention relates to a matrix display screen which includes, in sequence: a mounting (); at least one first metal portion (); a stack of layers () including transistors (TFT, TFT); and organic light-emitting diodes ().

Display screen having organic light-emitting diodes

An organic optoelectronic device incorporating a hermetic thin-film encapsulation, and encapsulation method are provided. This device has a useful emission or absorption face and, behind this face, a substrate coated with an array of radiation-emitting or radiation-absorbing organic structures inserted between, and electrically contacting, electrodes that are respectively proximal and distal relative to the substrate. Separating beads between structures, composed of an insulating material, extend between the respective proximal electrodes of the structures from peripheral edges of these electrodes. The device includes a hermetic encapsulation that has at least one inorganic internal film surmounting the distal electrode, a photosensitive polymer layer covering this internal film, and a dielectric inorganic external film acting as a barrier covering the polymer layer. The polymer layer is etched with a discontinuous geometry formed of segments that respectively surmount the structures and end beyond the structures in line with the beads.

Organic optoelectronic device and the encapsulation method thereof

The invention relates to an organic optoelectronic device, such as a display device, which is protected from the surrounding air by a sealed encapsulation which includes thin layers, and to a method for encapsulating the same. Said device has an electroluminescent unit having at least one active area () covered with a multi-layer encapsulation structure () and an electric connection area adjacent to the active area, the encapsulation structure including n stack(s) (n&#x2267;1) comprising an inorganic film F, . . . , Fn and a photosensitive layer C, . . . , Cn, including an internal stack FCin which Fcovers the active area and C, which is deposited in a liquid phase, is superposed thereon. According to the invention, the layer or each layer C, Cn is etched and covers the film F, . . . , Fn by extending around a peripheral edge () of the active area in at least one structured surrounding portion () ending beyond the adjacent connection area, and if n&#x3e;2, the or each layer C, . . . , Cn surrounds the layer C, . . . , Cn&#x2212;1 of the immediately underlying stack, such that the layer or each layer C, . . . , Cn passivates the film F, Fn and laterally protects the underlying active area from the developing solutions and solvents used for etching said layer C, . . . , Cn.

Organic optoelectronic device and method for encapsulating same

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Saint Joseph de Riviere, France

Bernard Aventurier