Abstract: Spectacles, comprising a face defining a passage for a nose of a user, may be provided with a lens-type optical unit. Internal edges may define the face, the edges being respectively turned toward lateral edges of the face. The spectacles may comprise a module for emitting visual information and a geometric element for returning the converted visual information, including towards a target zone of the optical unit. The emitting module may be placed at the bottom or top portion of an internal edge of the face, whereas a geometric return element may be placed in the top or bottom portion. The return element may be placed at the top portion of one internal edge when the emitting module is placed at the bottom portion of the one internal edge. And the return element may be placed at the bottom portion when the emitting module is placed at the top portion.

Abstract: Displaying device comprising an emissive display and at least one controller configured to control said Mrs display, said display comprising a matrix array (100) of light-emitting pixels deposited on a substrate, each pixel (101) being formed, at least in one portion of said emissive display, of a plurality of elementary emitting zones Z, said elementary emitting zones Z comprising at least one elementary emitting zone ZA of a first group A and at least one elementary emitting zone ZB of a second group B, said device being characterised in that the ratio S of the sum SB of the areas of the elementary emitting zones ZB of the second group B and of the sum SA of the areas of the elementary emitting zones ZA of the first group A, which is defined by S=SB/SA, is lower than 0.35, preferably lower than 0.20, more preferably lower than 0.10, and even more preferably lower than 0.05.

Abstract: Displaying device comprising an emissive display and at least one controller configured to control said Mrs display, said display comprising a matrix array (100) of light-emitting pixels deposited on a substrate, each pixel (101) being formed, at least in one portion of said emissive display, of a plurality of elementary emitting zones Z, said elementary emitting zones Z comprising at least one elementary emitting zone ZA of a first group A and at least one elementary emitting zone ZB of a second group B, said device being characterised in that the ratio S of the sum SB of the areas of the elementary emitting zones ZB of the second group B and of the sum SA of the areas of the elementary emitting zones ZA of the first group A, which is defined by S=SB/SA, is

Abstract: Protective mask (1) comprising a frame (5) suitable for being mounted on the face of a user, a window (2) carried by said frame, an optical display system (10) which comprises a display (12) capable of projecting an image, and a prism (20) capable of receiving said image from said display and forwarding it, characterised in that the prism (20) has a first (21) and a second (22) active face and a basal face (23), the window having, on its inner face (3), a projection area (30), and said display and said prism are configured and arranged so that said display projects said image onto the first active face (21) of the prism (20), the image crosses the prism and is reflected by the basal face (23) of the prism (20) to the second active face (22), the image is projected from said second active face (22) of the prism (20) onto said reflection area (30) of said window (2), and said window projects said image into the eye of the user (41).

Abstract: Spectacles (1) comprising a face (10) that is provided with at least one lens-type optical unit (4), said face defining a passage (13) for the nose of the user, said passage for the nose being defined by first and second so-called internal edges (14a, b) of the face, said edges being turned toward first and second lateral edges (12a, b) of the face (10), respectively, the spectacles (1) furthermore comprising: —a module (2) for emitting visual information, comprising an element for emitting said visual information; —and a geometric element (3) for returning the converted visual information, which is able to return the converted visual information toward a target zone (6) of the optical unit (4), characterised in that: —the emitting module (2) is placed in the bottom or top portion of a first internal edge (14a) of the face (10), whereas the geometric return element (3) is placed in the top or bottom portion of the first internal edge (14a), the geometric return element (3) being placed in the top portion of t

Abstract: Diode comprising: an organic electroluminescent layer (4) interposed between a lower transparent electrode (5) and an upper transparent electrode (3); and a dielectric layer (6,2) placed in contact with each electrode (5, 3) opposite the organic electroluminescent layer (4), which is adapted so as to obtain, in combination with said electrode (6, 2), maximum reflectivity of the emitted light. Such a structure optimizes the light extraction and therefore the luminous yield. Displays or illumination panels comprising an array of these diodes.

Abstract: The invention relates to a multimirror device for rotating the polarization of an electromagnetic signal, especially a light signal, through 90°, the output ray having approximately the same direction as the input ray. This device comprises at least one combination (40) of three mirrors (42, 44, 46) which are arranged in such a way that a ray entering one of the mirrors at an angle of incidence of 45° is reflected at the same angle off the other mirrors, the polarization vector (V) of the incident ray being presented in such a way with respect to the mirrors that a reflection off one of the three mirrors changes the direction of polarization while the reflections off the other two mirrors does not change this direction of polarization. Preferably, a plurality of multiple-mirror combinations (40, 40′, 40″) is provided on a sheet, each combination forming a pattern which is repeated regularly, the patterns all having identical shapes and sizes.

Abstract: The invention relates to a multimirror device for rotating the polarization of an electromagnetic signal, especially a light signal, through 90°, the output ray having approximately the same direction as the input ray.

Abstract: The present invention relates to a device for illuminating at least one surface, which includes a light source and a reflector in order to focus the light rays emitted by the source. In said device, the focal plane of the reflector lies between the light source and the said surface and it includes, positioned close to the focal plane of the reflector, a means forming a second light source.

Abstract: The disclosure relates to a device for illumination of a screen, notably a liquid-crystal screen. It includes a light integrator that receives a light beam from a source and outputs an illuminating beam for the screen. The light integrator makes use of lenses, but has no lenses in the parts of the beam where the energy flux is weak, which enables more uniform illumination of the screen. To improve the contrast of the illumination of the liquid-crystal screen, the whole illuminating beam is directed onto the screen at an angle to the optical axis of the system. The invention is applicable to liquid-crystal screens.

Abstract: An optical polarization device including a source of light emitting a light beam, and a polarization beam splitter for reflecting the s-polarization component of the light beam and transmitting the p-polarization component. A Fresnel structure with a reflective coating receives the s-polarization component, rotates it 90 degrees and returns it to the beam splitter. A plate of micro-prisms, functioning in reflection total, recombine the two polarization components of the light beam so as to produce a collimated beam.

Abstract: A television receiver or video monitor of the back-projection type, in which a projector forms an image which can be observed on a visual display screen by rear illumination after reflection on a deflecting mirror. The projector includes in immediate proximity to the visual display screen and parallel to the latter, a reflection-transmission screen comprising a Fresnel surface, the projector, reflection-transmission screen and deflecting mirror being configured together to form an optical system such that the reflection-transmission screen reflects the rays directly emanating from the projector in the direction of the deflecting mirror and transmits these rays after their reflection on this deflecting mirror. The Fresnel surface includes striations of triangular cross-section, these striations locally forming prisms and capable of reflecting the rays which strike them when the angle of incidence of the rays are greater than a predetermined value and of transmitting the rays in an opposite case.

Abstract: The disclosure relates to an LCD projector illumination system that optimizes the illumination through a liquid crystal screen as well as through the aperture of the system's objective, wherein the shape Zr,.beta. of the reflector is described by a set of elementary surfaces dS each of which is associated with a function Z(.rho.), corresponding to a median plane (r,.beta.) to be illuminated, defined by the distance r between the center and the edges of said screen and the angle .beta. between the horizontal plane and this median plane, the inclination of each elementary surface dS being computed by interpolating said functions Z(.rho.) with a function Z(x,y).

Abstract: A device for illuminating an area includes a circular reflector for focussing a light ray from a light source into a beam. A polarizer splits the beam into an effective beam having a first polarization direction and a complimentary beam having a second polarization direction. The polarizer reflects the effective radiation toward the area to be illuminated and transmits the complementary radiation to a rough surface having a roughness at least an order of magnitude greater than the wavelength of the light to diffuse the light and reflect at least a portion of the complementary beam back to the reflector and another portion to the area to be illuminated.