Abstract: The invention relates to a display device (1) comprising: - a light source (20) designed to generate a source light beam (S) extending over a predetermined wavelength range; - a diffractive optical element (40), the operating range of which is adapted to said wavelength range and which is arranged to receive said source light beam (S) and to transmit an image light beam (I); and - a dichroic filter (50) placed in the path of said image light beam and the passband of which at least partially covers said wavelength range so as to at least partially transmit said image light beam.

Abstract: The invention relates to a device (20) for generating images, comprising: —a diffuser (25), and—a scanning unit (22) designed to generate a light beam scanning a face of said diffuser. According to the invention, the image generating device also comprises an autostereoscopic filter (26).

Abstract: The invention relates to a display (1) comprising—a casing (10), —an image generation unit (20), and—a light sensor (30), disposed in the interior (INT) of said casing (10), suitable for delivering a signal representative of a light intensity received by same, the display (1) being adapted such that the luminosity of an image generated by the image generation unit (20) is controlled as a function of said signal. According to the invention, the display (1) further comprises a light guide (50) situated in the interior (INT) of the casing (10) of the display (1), having an inlet face (51) and being shaped to collect at the input face (51) of same a light ray coming from outside the casing (10) of the display, and for guiding said light ray to said sensor (30).

Abstract: The invention relates to an active screen (220), i.e. to a light-emitting screen, comprising a matrix array of modules (222) that each form one pixel, and a matrix array (260) of control elements that are intended to address each of these modules, respectively. According to the invention, each module comprises at least three light-emitting submodules (224) that each include a three-dimensional light-emitting structure (250), and each control element is intended to individually address each submodule. A head-up display (1) comprising such a screen (220), and a device (24) for projecting images, said device being suitable for transmitting, in the direction of a semitransparent mirror (10) the images generated by said screen, is also described.

Abstract: An image generating device (3) comprises a liquid-crystal screen (8) and a light source (5). The liquid-crystal screen (8) comprises a matrix of liquid crystals interposed between an input polariser and an output polariser. The image generating device (3) comprises a first additional polariser (16) located on the light path, upstream of said liquid-crystal screen (8), and a second additional polariser (18) located on the light path, downstream of said liquid-crystal screen (8). The invention also relates to a head-up display (1) comprising a device (3) of this type.

Abstract: The invention relates to an image generating device (11), comprising: —a light source (12), —a light modulator (13) or a diffuser adapted to display an image on an output face side, and—an auto-stereoscopic filter (14) of which an input face is turned towards the output face of the light modulator or the diffuser. According to the invention, the auto-stereoscopic filter extends opposite only a portion of the output face, and an image plane offset panel (15) is provided, which is located only opposite the remaining portion of the output face.

Abstract: An image generating device (3) comprises a liquid-crystal screen (8) and a light source (5). The liquid-crystal screen (8) comprises a matrix of liquid crystals interposed between an input polariser and an output polariser. The image generating device (3) comprises a first additional polariser (16) located on the light path, upstream of said liquid-crystal screen (8), and a second additional polariser (18) located on the light path, downstream of said liquid-crystal screen (8). The invention also relates to a head-up display (1) comprising a device (3) of this type.

Abstract: The invention relates to a display (1) comprising—a casing (10),—an image generation unit (20), and—a light sensor (30), disposed in the interior (INT) of said casing (10), suitable for delivering a signal representative of a light intensity received by same, the display (1) being adapted such that the luminosity of an image generated by the image generation unit (20) is controlled as a function of said signal. According to the invention, the display (1) further comprises a light guide (50) situated in the interior (INT) of the casing (10) of the display (1), having an inlet face (51) and being shaped to collect at the input face (51) of same a light ray coming from outside the casing (10) of the display, and for guiding said light ray to said sensor (30).

Abstract: A compact head-up display for a vehicle includes: an image generator that displays an image on a display surface, and a semi-reflecting optical element, arranged at a distance from the image generator, that forms, on a first side of the optical element, a virtual image. The virtual image is visible from a viewing window on a second side of the optical element. The display includes an optical component that lengthens the optical path of the image passing from the image generator to the optical element. The optical component includes one entry face and one exit face, and a first reflecting face and a second reflecting face. The first reflecting face reflects the image from the entry face toward the second reflecting face. The second reflecting face reflects the image from the first reflecting face toward the exit face. The entry face is in contact with the display surface.

Abstract: The invention relates to an image generating device (11), comprising:—a light source (12),—a light modulator (13) or a diffuser adapted to display an image on an output face side, and—an auto-stereoscopic filter (14) of which an input face is turned towards the output face of the light modulator or the diffuser. According to the invention, the auto-stereoscopic filter extends opposite only a portion of the output face, and an image plane offset panel (15) is provided, which is located only opposite the remaining portion of the output face.

Abstract: The invention relates to a device (20) for generating images, comprising: a diffuser (25), and a scanning unit (22) designed to generate a light beam scanning a face of said diffuser. According to the invention, the image generating device also comprises an autostereoscopic filter (26).

Abstract: The invention relates to an active screen (220), i.e. to a light-emitting screen, comprising a matrix array of modules (222) that each form one pixel, and a matrix array (260) of control elements that are intended to address each of these modules, respectively. According to the invention, each module comprises at least three light-emitting submodules (224) that each include a three-dimensional light-emitting structure (250), and each control element is intended to individually address each submodule. A head-up display (1) comprising such a screen (220), and a device (24) for projecting images, said device being suitable for transmitting, in the direction of a semitransparent mirror (10) the images generated by said screen, is also described.

Abstract: The invention relates to a head-up display device (1) for a vehicle (2) comprising:—an image generating unit (4) generating a primary light beam (7) representing a scene to be displayed, and—an optical projection system (8, 9) for projecting this scene onto an individual (3) situated inside the vehicle, the optical projection system comprising a return mirror (8) having a first face (10) and a second face (11), the first face being turned towards the image generating unit so as to reflect the primary light beam towards a combiner (9) adapted to form an image (16) of the scene visible by the individual. According to the invention, the device comprises at least one element (18) facing the second face of the return mirror and adapted to emit a secondary light beam (19) in the direction of this second face, the secondary light beam being transmitted through the return mirror towards the combiner forming an image (20) of the element visible by the individual.

Abstract: The invention relates to a compact head-up display (1), in particular for a motor vehicle, comprising: an image generator (9) for displaying an image (7) on a display surface (2); a semi-reflective optical element (3), typically a windscreen, arranged at a distance from the image generator (9) so as to form a virtual image (4) of the image (7) from the image generator (9) on a first side of the optical element (3), said virtual image (4) being visible from a view window (5) located on a second side of the optical element (3). The compact head-up display (1) comprises an optical part (10), typically a pentaprism, for extending the optical path of the image (7) passing therethrough from the image generator (9) to the optical element (3), said optical part (10) comprising an image input face (14) and an image output face (17), as well as first (15) and second (16) reflective surfaces.

Abstract: The invention relates to a head-up display (1) with a side image generator (2), particularly for motor vehicle. Said head-up display comprises:—an image generator (2) configured to display an image along a display axis (7);—a semi-reflective optical element (3) arranged space apart from the image generator (2) and configured o display a virtual image along a projection axis (9); and—at least one mirror (4) arranged on the display axis (7) so as to reflect the image from the image generator (2) towards the optical element (3) along a reflection axis (8). The display axis (7) of the image generator (2) is perpendicular to the projection axis (9) of the optical element.

Abstract: The subject of the invention is a device for generating images (10) for automotive vehicle head-up display (100), comprising a liquid crystal screen (12) and a back-lighting device (14), said back-lighting device (14) comprising: at least one light-emitting diode (16), a housing (28; 29) surrounding the space lying between the at least one light-emitting diode (16) and the liquid crystal screen (12), characterized in that said housing (28; 29) is bent, the device for generating images (10) furthermore comprising a reflecting surface (31; 32) arranged in a bent portion (28c; 29c) of the housing (28; 29) and oriented in such a way as to reflect the light emitted by the at least one light-emitting diode (16) in the direction of the screen (12). The invention also relates to a head-up display (100).

Abstract: The invention relates to an image generator, particularly for head-up display with an adjustable viewing window, particularly for motor vehicle. The image generator is configured to display an image (7) on a display surface (2). The image (7) is for a semi-reflective optical element (3) arranged spaced apart from the image generator and configured to form, on a first side of the optical element (3), a virtual image (4) of the image (7). The virtual image (4) is visible from a viewing window (5) located on a second side of the optical element (4). The image generator is configured to display the image (7) on only one part of the display surface (2) and comprises a means for moving the image (7) on the display surface (2). The invention also relates to a head-up display (1) with an adjustable viewing window, said display comprising such an image generator.