Patent application number | Description | Published |
20080198430 | Method and Device for Encoding and Reconstructing Computer-Generated Video Holograms - A method and a device for encoding and reconstructing computer-generated video holograms using a conventional LC display: it provides holographic reconstruction of three-dimensional scenes using electronically controllable pixel in a holographic array ( | 08-21-2008 |
20080212153 | Controllable Illumination Device - The invention relates to a controllable illumination device for an autostereoscopic or holographic display, which illumination device contains an illumination matrix of primary light sources having at least one luminous element per light source and a controllable light modulator (SLM) and a reproduction matrix. A computer-generated hologram (CGH) illuminated by the primary light sources ( | 09-04-2008 |
20090180165 | Method for the Compensation of an Inhomogeneous Brightness Perception in Holographically Reconstructed Scenes - To compensate for an inhomogeneous brightness perception in a holographic reconstruction of 3D-scenes ( | 07-16-2009 |
20090219385 | Method for the Multimodal Representation of Image Contents on a Display Unit for Video Holograms, and Multimodal Display Unit - The invention relates to a method for the multimodal representation of image contents on a display unit for video holograms. Said unit comprises at least one or several light sources (LS), an optical system (L), and a spatial light modulator SLM (S) with hologram contents. According to the inventive method, the unit directs the wavefront that an object would emit to the associated eye positions (EP) such that the viewer sees the reconstruction of the scene and different views are presented to the eyes by means of temporal or spatial multiplexing in order to generate the stereo effect. The inventive method is characterized in that the light of the zero order of diffraction is directed to the eye positions (EP) for a holographic representation in a first mode, whereby the viewer sees the reconstructed scene (3D-S), while the non-diffracted light is directed to the eye positions for a direct representation in a second mode, whereby the viewer sees an autostereoscopic and/or a 2D representation (3D-2D) on the SLM. The invention also relates to display units for implementing said method. | 09-03-2009 |
20100014136 | Holographic Projection System Using Micro-Mirrors for Light Modulation - The invention relates to a holographic projection system wherein light modulator means SLM with electromechanically moved micro-mirrors modulate a light wave front LW | 01-21-2010 |
20100027083 | COMPACT HOLOGRAPHIC DISPLAY DEVICE - A holographic display device comprises a first OLED array writing onto a first OASLM, the first OLED array and the first OASLM forming adjacent layers, and a second OLED array writing onto a second OASLM, the second OLED array and the second OASLM forming adjacent layers. The first and the second OASLMs encode a hologram and a holographic reconstruction is generated by the device when an array of read beams illuminates the first and second OASLMs and the first and second OASLMs are suitably controlled by the first and second OLED arrays. Advantages include that this device permits independent control of phase and amplitude, and the device lends itself to compactness. | 02-04-2010 |
20100045775 | Holographic Reconstruction System Having an Enlarged Visibility Region - The invention relates to a holographic reconstruction system for the reconstruction of scenes having at least one video hologram modulated wave front, and an enlarged visibility region. The system utilizes two-dimensional coded light modulator cells of spatial light modulation means and optical focusing means, which realize a Fourier transformation of the modulated wave front in their focal plane. First optical deflection means deflect the parallel disposed partial light waves such that their Fourier transformations appear as cascading in the focal plane. A spatial frequency filter located on the focal plane, lets each of the same diffraction orders of all modulated partial light waves pass, and second optical deflection means arrange the wave front strips next to each other at the modulated wave front, which reconstructs the scene. | 02-25-2010 |
20100046049 | COMPACT HOLOGRAPHIC DISPLAY DEVICE - A holographic display device comprises an OLED array writing onto an OASLM, the OLED array and OASLM forming adjacent layers. The OASLM encodes a hologram and a holographic reconstruction is then generated by the device when an array of read beams illuminates the OASLM. The OASLM is suitably controlled by the OLED array. An advantage of the device is that it lends itself to compactness. | 02-25-2010 |
20100046050 | COMPACT HOLOGRAPHIC DISPLAY DEVICE - Holographic display device comprising a first EASLM and a second EASLM, the pair permitting independent modification of phase and amplitude, in which holographic reconstruction is visible through one or more virtual observer windows. An advantage is that an observer may view a holographic reconstruction through one or more virtual observer windows from a device housing a pair of EASLMs which permit independent modification of phase and amplitude. | 02-25-2010 |
20100053711 | DEVICE FOR SELECTION OF LIGHT IN A REFRACTION ARRANGEMENT - A device for the selection of light of at least one diffraction order comprises a light modulator device comprising a hologram. The light modulator device emits modulated light, where the light comprises one beam which is not deflected by the hologram and at least one diffracted beam. The device comprises at least one controllable angle-selective optical element which selects the light of diffraction orders. | 03-04-2010 |
20100097439 | MOBILE TELEPHONY SYSTEM COMPRISING HOLOGRAPHIC DISPLAY - A mobile telephony system comprising a calling party mobile telephone with an imaging system and a display. The imaging system is operable to capture an image of the calling party. The calling party mobile telephone sends an image of the calling party to a called party mobile telephone over a wireless link, and the called party mobile telephone locally generates a holographic reconstruction of the calling party using a holographic display that is encoded with a hologram. An advantage is that a mobile telephone call may be held in which one party views a holographic reconstruction of the other party. | 04-22-2010 |
20100103485 | HOLOGRAPHIC DISPLAY DEVICE - A holographic display comprising light sources (L | 04-29-2010 |
20100118117 | 3D CONTENT GENERATION SYSTEM - A 3D content generation system comprising a content generating party that generates 2D content and sends that content to a remote intermediary. The remote intermediary processes the content to facilitate subsequent holographic reconstruction and sends the processed content to a holographic display device which locally generates a 3D holographic reconstruction of the content. An advantage is that 2D content may be processed remotely to provide 3D holographic content. | 05-13-2010 |
20100165428 | Device for Minimizing Diffraction-Related Dispersion in Spatial Light Modulators - A device for minimizing diffraction-related dispersion in spatial light modulators for holographically reconstructing colored representations is disclosed, and comprises a spatial light modulator designed as a diffractive optical element and provided with controllable structures, and at least one light source illuminating the spatial light modulator. Wavelength-dependent visible ranges associated with a predefined higher order of diffraction have a lateral chromatic offset relative to the position of the extensions of said visible ranges at a defined viewer's level, said lateral chromatic offset being in relation to the normal line to the surface of the spatial light modulator. The quality of reconstruction is improved regardless of the direction of incidence and emergence of the light. | 07-01-2010 |
20100195178 | Device for Light Modulation - In known light modulation means, complex phase and amplitude values for modulating light waves are implemented and modulated either separately by two different light modulation means or a light modulation means having two layers of double-refracting materials, leading to increased expenses for material and adjustment. A new device is disclosed that simplifies the modulation of light waves in phase and amplitude in a single light modulation means made of double-refracting material. In a device having regularly disposed, controllable light-modulated elements having a double-refracting material for complex modulation of coherent light waves, and a modulation controller controlling the force-induced alignment of the optical axes of the molecules of the double-refracting material, means are provided for independently aligning the optical axes of the molecules in the light-modulating elements in two dimensions. The alignment can take place by electrical, magnetic, or optical acting means. | 08-05-2010 |
20100214395 | Camera System with Eye Finder Modules - The detection of the position of observer eyes in large object planes by a camera system with eye finder modules is disclosed, each of which comprises a camera with an objective lens and a camera chip. An embodiment is based on a camera system with two eye finder modules, where each eye finder module comprises an objective lens and a camera chip for detecting and determining the position of observer eyes in at least one object plane, and where the camera system is connected with a control unit. | 08-26-2010 |
20100271675 | METHOD FOR ENCODING A COMPUTER-GENERATED HOLOGRAM - The object of the invention is to improve the quality of encoding a CGH of a three-dimensional object on a light modulator with the help of an iterative method with phase encoding and thus to improve the reconstruction quality. Based on given object data sets, a two-dimensional distribution of N complex values of a wave field in a virtual observer window ( | 10-28-2010 |
20110149018 | HOLOGRAPHIC DISPLAY DEVICE COMPRISING MAGNETO-OPTICAL SPATIAL LIGHT MODULATOR - A holographic display device comprising at least one magneto-optical spatial light modulator (MOSLM). The holographic display device may comprise a first MOSLM and a second MOSLM, the first and second MOSLMs encoding a hologram and a holographic reconstruction being generated by the device. An advantage of the device is fast encoding of holograms. | 06-23-2011 |
20110216383 | HOLOGRAPHIC COLOR DISPLAY - Disclosed is a color filter with parallel, vertical color strips of the RGB base colors associated with the image separating means, the color strips repeating horizontally within the color filter in periodic fashion. The light modulator contains a sequence of two registered holograms for each base color interlaced into six pixel columns for a left observer eye and for a right observer eye, and the sequence is repeated horizontally in periodic fashion. The periods of the color filter and the hologram are arranged relative to one another with the same degree of expansion, with a color strip and at least two pixel columns with holograms of the base color of the color strip are associated with a separating element. | 09-08-2011 |
20120092735 | THREE-DIMENSIONAL LIGHT MODULATION ARRANGEMENT FOR MODULATING A WAVE FIELD HAVING COMPLEX INFORMATION - The present invention relates to a three-dimensional light modulator, of which the pixels are combined to form modulation elements. Each modulation element can be coded with a preset discrete value such that three-dimensionally arranged object points can be holographically reconstructed. The light modulator according to the invention is characterized in that assigned to the pixels of the modulator are beam splitters or beam combiners which, for each modulation element, combine the light wave parts modulated by the pixels by means of refraction or diffraction on the output side to form a common light beam which exits the modulation element in a set propagation direction. | 04-19-2012 |
20120092750 | LIGHTING DEVICE FOR A DIRECT VIEWING DISPLAY - The present invention relates to a lighting device having a planer optical fiber and at least one light source device for illuminating a controllable spatial light modulator, wherein the optical fiber comprises a light-conducting core and a cover coating, and the light modulator comprises a pixel matrix, the light source device is disposed on the side of the optical fiber, and the light emitted by at least one light source of the light source device propagates laminarly in the optical fiber. The lighting unit according to the invention is characterized in that the planar optical fiber comprises a deflecting coating having a selective polarization function for laminarly decoupling and deflecting the evanescent wave field of the light propagating in the optical fiber, wherein the thickness of the cover coating reduces in the direction of light propagation. | 04-19-2012 |
20120188621 | HOLOGRAPHIC RECONSTRUCTION SYSTEM HAVING AN ENLARGED VISIBILITY REGION - The invention relates to a holographic reconstruction system for the reconstruction of scenes having at least one video hologram modulated wave front, and an enlarged visibility region. The system utilizes two-dimensional coded light modulator cells of spatial light modulation means and optical focusing means, which realize a Fourier transformation of the modulated wave front in their focal plane. First optical deflection means deflect the parallel disposed partial light waves such that their Fourier transformations appear as cascading in the focal plane. A spatial frequency filter located on the focal plane, lets each of the same diffraction orders of all modulated partial light waves pass, and second optical deflection means arrange the wave front strips next to each other at the modulated wave front, which reconstructs the scene. | 07-26-2012 |
20130321899 | LIGHT MODULATION DEVICE FOR A DISPLAY - A display comprising an observer window, which in 3D and/or 2D representation mode of a 3D scene can be adapted to changing eye positions. Several observers can use the display simultaneously. The display includes a light modulation device having an actuatable diffraction unit and a controllable spatial light modulator, in which a 3D scene is coded in an actuatable manner, and a control unit. An observer window can be generated using coherent light beams on alternating eye positions. The diffraction unit includes at least electrodes and a controllable material into which a prism and/or lens function and/or scatter function can be written as a diffraction grating with a phase progression in an at least one-dimensionally controllable manner. | 12-05-2013 |
20140300709 | DISPLAY DEVICE AND METHOD FOR REPRESENTING A THREE-DIMENSIONAL SCENE - The invention relates to a display device for representing a three-dimensional scene, comprising a light source array, a lenticular system and a data display in this order, but not necessarily immediately following one another, and a corresponding method for representing a three-dimensional scene. The object thereof is to enlarge the observer region of a 3D display in such a way that this simultaneously provides a plurality of observers with the option of perceiving the 3D scene on the 3D display. This is achieved by an aforementioned display device with a multiplexing element, which follows the data display and can be used to distribute light incident from the data display into a plurality of angle segments, and by an aforementioned method, in which, in an additional step, a multiplexing element distributes the light coming from the data display in a plurality of angle segments. | 10-09-2014 |
20150036199 | METHOD OF COMPUTING A HOLOGRAM - A method of computing a hologram by determining the wavefronts at the approximate observer eye position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window that would be generated by a real object located at the same position of the reconstructed object. One can then back-transforms these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram can then generate a reconstruction of the three-dimensional scene that can be observed by placing one's eyes at the plane of the observer window and looking through the observer window. | 02-05-2015 |