Abstract:
In a head-up display system for motor vehicles, the image generated by a display is focused by an image-formation system into a virtual image, set at a pre-set distance from the driver of the motor vehicle. The beam of light leaving the image-formation system is deviated towards an optical combiner by an expansion and deviation system, which is shaped and set in such a way as to multiply the dimension in the direction normal to the road surface of the beam of light leaving the image-formation system. It is thus possible to guarantee an adequate extent of the region of space in which the driver can move his head without loosing perception of the image as a whole, notwithstanding the fact that the space occupied by the expansion and deviation system has a limited size in the direction normal to the road surface.
Abstract:
A light emitting device comprises a substrate, a porous alumina layer having a regular series of cavities of nanometric size containing an emitting material, and two electrodes in contact with the emitting material and connected to an electric voltage source. The first electrode comprises at least part of an aluminum film deposited onto the substrate, on which the alumina layer has been previously grown through an anodization process.
Abstract:
The present invention concerns a display device comprising: at least one micro-reaction-chamber (2) to which is associated an inlet (3a) to receive a reaction liquid and an outlet (4b) to discharge the product of reaction; at least one charge micro-channel (3) connected to said inlet (3a) and at least one discharge micro-channel (4) connected to said outlet (4b); a porous substratum (2a) situated inside said micro-reaction-chamber (2); at least one chemical and/or biological element (22) immobilised on the porous substratum (2a) capable of generating light emission when in contact with the reaction liquid.
Abstract:
A substrate made of transparent material having a surface presenting a regular and orderly distribution of reliefs or cavities of nanometric dimensions is obtained with a method including the depositing of a layer of aluminium on the substrate made of transparent material, and subsequent operations of anodization of the aluminium in order to obtain an alumina structure with an orderly distribution of pores according to a pattern that is transferred onto the surface of the transparent substrate. The alumina can be used as sacrificial layer or else can remain as forming an integral part of the finished product. The method is performed in such a way as to obtain cavities or reliefs sized and arranged so as to bestow upon the transparent substrate anti-reflection properties, so as to increase the percentage of radiation transmitted by the transparent substrate at the wavelengths at which said anti-reflection properties are manifested. Alternatively, the method is carried out on a metal substrate, which is then used for the moulding of the transparent substrate.
Abstract:
A reflector for a vehicle headlight is described, capable of illuminating the surrounding space according to a predetermined light distribution. The reflector is formed of a plurality of sectors capable of reflecting the light beam emitted by a light source of the headlight and directing it into predetermined regions of said light distribution. The major part of the sectors of the reflector is delimited at least in part by an edge in which the divergence value of the light beam reflected at said edge portions is constant. The sectors delimited by edge portions having lower values of the angle of spread are arranged to direct the light beam reflected thereby into the regions of the light distribution having a higher spatial gradient of illuminance.
Abstract:
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 underlayer 1 is 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.
Abstract:
In a process to make an emitter (10) for light sources, which can be led to incandescence through the passage of electric current, a layer made of anodized porous alumina (1) is used as sacrificial element for the structuring of at least a part of the emitter (10).
Abstract:
A process for manufacturing an electroluminescent device comprising the steps of: making an organic or inorganic templating frame, comprising monodispersed nanoelements, in particular nanospheres; providing said nanoelements with a sheath consisting of metal nanoparticles, each nanoelement with its sheath of metal nanoparticles forming a core shell. The core shells are assembled together so as to make the three-dimensional percolated layer, having cavities whose size is around wavelength.
Abstract:
A system for projecting a virtual image within an observer's field of view comprises a support element, a transparent element mounted on the support element and suitable for being placed in front of the observer's eyes, the transparent element comprising a first face and a second face, an image display device suitable for forming an additional image, and a projection and focusing device for projecting the additional image in a manner such as to present it superimposed on the image of the outside world. The display device comprise light-emitting devices disposed on one of the faces of the transparent element, and the projection and focusing device comprise optical elements associated with respective emitting devices and arranged on the other face. Each of the optical elements creates a virtual image of the emitting device associated therewith. The virtual images of the emitting devices together form the additional image.
Abstract:
The device includes a combustor comprising an inlet chamber or region intended to receive a flow of fuel and a combustion supporter at high pressure, an outlet chamber or region or combustion product exhaust at relatively lower pressure, and at least one separation element of nano-porous or micro-porous semi-conductor material which separates the inlet chamber or region from the outlet chamber or region. The separation element has a plurality of nano-pores or micro-pores passing therethrough which define communication passages between the inlet clad chamber or region and the outlet chamber or region. The surface of these pores is at least partly clad in a layer of an electrically conductive or semi-conductive material which, relative to the semi-conductor material of the separation element forms an essentially extended junction, in particular a p-n junction or a Schottky junction or a hetero junction. First and second electrodes are connected to the cladding of the pores passing therethrough, and respectively, to the semi-conductor material of the separation element. In operation the pores act as confined microcombustion chambers and the energy developed by the combustion is able to cause creation of stable electron-hole pairs at the said junction and the generation of a corresponding potential difference between the electrodes.