C.r.f. Societa Consortile Per Azioni

C.r.f. Societ&agrave; Consortile Per Azioni

Centro Ricerche Plast-Optical S.r.l.

Societa Consortile Per Azioni

C.r.f. Societa' Constorile Per Azioni

Sabino Sinesi

Piermario Repetto

Piero Perlo

Davide Capello

Denis Bollea

Vito Guido Lambertini

Stefano Bernard

Michele Antonipieri

Claudia Bigliati

Sara Padovani

Alberto Pairetti

Luca Sardi

Gianluca Rotaris

Daniele Pullini

Patrizia Melpignano

Silvia Priante

A method of fabrication of transparent LED devices, of the type comprising the operations of: i) providing a series of conductive paths on a transparent underlayer; ii) connecting said conductive paths to electronic control means; iii) associating to said underlayer an array of LED sources addressable individually or in groups through said conductive paths, in which i) said LED sources are integrated in the form of chips, i.e., of elements obtained by dividing up a semiconductor wafer and without package, via technologies of the chip-on-board type; ii) said method envisages the use of the flip-chip technique for die bonding, i.e., the electrical connection of the chip to the underlayer.

Method for manufacture of transparent devices having light emitting diodes (LED)

Described herein is a transparent device for display of information superimposed on a background, said device comprising a plurality of LED sources, addressable individually or in groups through a series of conductive paths deposited on a transparent underlayer and connected to a control electronics, in which: i) said LED sources are integrated in the form of dice, i.e., of elements obtained by dividing up a semiconductor wafer and without package; and ii) at least one of said conductive paths is with interrupted stretches and replaced by stretches of metal wire, bonded to said paths through a wire-bonding operation.

Transparent LED display and method for manufacture thereof

Described herein is a transparent-display device for motor vehicles, to be used for presentation of information to the driver and/or to the passengers, said device comprising a plurality of LED sources, addressable individually or in groups through a series of conductive paths, deposited on a transparent underlayer and connected to a control electronics, in which: i) said LED sources are integrated in the form of dice, i.e., of elements obtained by dividing up a semiconductor wafer and without package; ii) said dice are integrated on, and electrically connected to, said underlayer via technologies of the chip-on-board type; and iii) said transparent underlayeris pre-arranged for being at least in part superimposed on the windscreen of the vehicle, in such a way that at least part of the information presented to the user is superimposed on the background, said background being visible to the user through said windscreen.

Transparent LED display

An optical element and module for the projection of a light beam, and motor vehicle lamp including a plurality of such modules An optical element for the projection of a light beam comprises a solid body () of transparent material in which is formed a cavity () able to receive a light source (), the cavity () extending along the principal axis (z) of the transparent body () and being delimited by a radially inner surface () and a terminal surface () of the transparent body (). The surfaces () are able to receive separate respective portions (I, II) of the light flux generated by the source (). The transparent body () further has a radially outer surface () which surrounds the radially inner surface (). The radially outer surface () reflects the portion of the light flux (I) coming from the radially inner surface () along a direction substantially parallel to the principal axis (z). The transparent body () has, on the opposite side, a central surface () and an annular surface () surrounding the central surface (), able to receive that portion (II) of the light flux and the reflected portion of the light flux (I) respectively and to transmit these light flux portions (I, II) in directions having predetermined orientations with respect to the principal axis (z). At least one of the surfaces () is rotationally asymmetric with respect to the principal axis (z) of the transparent body (). The surfaces () cooperate in such a way as to shape the overall light flux (I, II) emitted by the central and annular surfaces () into a light intensity distribution having different divergences in two 25 directions perpendicular to one another and to the principal axis (z).

Optical element and module for the projection of a light beam, and motor vehicle lamp including a plurality of such modules

A light device, for example in the form of a light panel for road signals or in the form of a motor-vehicle light, comprises an array of light sources, such as LEDs or the like. Associated to each light source is an optical system consisting of a refractive lens of a plane-convex type having a plane face facing the light source, in which a diffuser of a refractive or diffractive micro-optical type is incorporated.

Light device, particularly a light panel for road signs or information to the public, or a motor-vehicle light

A lighting device, comprising a luminous source consisting of a LED ( ) that is placed between the flanges ( ) of a primary reflector ( ), which is essentially V-shaped. A secondary reflector ( ), composed of an elongated element with steps ( ), runs along the extension of one of the flanges ( ) of the primary reflector ( ), while an elongated transparent diffuser ( ) runs along the extension of the other flange ( ).

Lighting device, particularly a motor vehicle light or emergency light

High-density polyethylene (HDPE) is used as a coating for optical elements operating in transmission in the infrared spectrum, which are made up of a material other than polyethylene, such as hygroscopic salt, semiconductor materials, fluorides, chalcogenides, silver halides, and others, so as to exploit the optical properties of HDPE, at the same time keeping the thickness reduced.

Optical element designed to operate in transmission in the infrared spectrum, provided with a high-density-polyethylene coating

The radiation beam emitted by a polychromatic source of finite dimension is incident onto an array of microlenses which have the function of converging and dividing the beam into a plurality of microbeams directed towards a matrix containing colored microfilters. Once the microfilters have been passed, the radiation reaches a matrix of microchoppers which can be selected independently from each other by a controller, for generating images.

Devices with micro-filters and micro-choppers for dynamic selection of colours and images

A reflector (R) for a lighting device having a light source elongated in one direction has a three-dimensional curved shape which provides a maximum efficiency of the device with the required control on the direction of the light beam at the output.

Reflector for a lighting device with an elongated light source

A lighting device includes a thin transparent plate in which a plurality of micro-lenses arranged in a matrix are integrated. A second thin transparent plate is supported so as to be movable relative to the first plate by means of at least one pair of flexures. A plurality of micro-lenses arranged in a matrix are also integrated in the second plate.

Lighting device, particularly a motor vehicle headlamp, having a

A lighting device which can be used for illuminating pedestrian crossings or in other applications where it is necessary to form a defined and uniform rectangular pattern includes a parabolic reflector element and a planar screen with an array of cylindrical microlenses or microprisms on a surface thereof.

Lighting device for generating a rectangular pattern at the work area,

The light radiation beam emitted by a source with finite dimension, integrated within a transparent plate, in contact therewith, is initially reflected inside the plate by a first reflecting or semi-reflecting planar surface towards a second planar reflecting surface. Both reflecting surfaces are constituted by portions with an irregular profile provided in the two faces of the transparent plate, without applying a reflective coating.

Lighting system with a micro-telescope integrated in a transparent plate

The light radiation beam emitted by a source of finite dimension, integrated in a transparent plate or in contact therewith, is initially reflected inside the plate by a first surface located on the side of the plate (3) which is more remote from the source. The reflected light rays pass through plate and are again reflected by a second surface having micro projections and then directed outwardly, according to a micro-telescope arrangement.

The radiation beam emitted by a polychromatic source of finite dimension is initially corrected in its vergency and distribution by a reflector or a system which operates according to refraction, diffraction or total inner reflection effects. The beam then strikes on an array of micro-lenses of square or rectangular shape of arbitrary cross-section which have the function to converge and divide the beam into a plurality of partial beams which may have different directions, towards a matrix of colored micro-filters or images.

Devices with micro-filters for selection of colors and images

An antireflection surface having a predetermined roughness so as to keep the reflectivity of incident radiation low. A profile with projections having a height which is an integer multiple of the radiation wavelength can trap the radiation irrespective from its polarization and also at large angles of incident light.

Growing community of inventors

Turin, Italy

Sabino Sinesi