Patent application number | Description | Published |
20090141285 | Input device and method for making same - A light guide has a first surface and a second surface with diffractive structures. A slanted facet is provided at one corner of the light guide. The diffractive structures have concentric fringes centered near the slanted facet. Fringes are arranged such that a light beam directed from the first surface at a location P toward the second surface is diffracted by the fringes only if the beam encounters the diffractive structures at a certain direction. The diffracted beam is guided and exits through the slanted surface at an exiting angle, which is correlated to the location P. If the light guide is illuminated in such a way that when an object is present at the first surface, it changes the light intensity of the exiting light beam. By detecting the exiting angle and the change of light intensity, the location of the object can be determined. | 06-04-2009 |
20090244706 | Illumination Method for Displaying Different Graphical Layouts - The specification and drawings present a new method, apparatus and software product for illuminating different graphical layouts in a component comprising an optical device, e.g., in a keyboard or in a liquid crystal display of an electronic device. The optical device uses a diffractive planar waveguide comprising diffraction gratings disposed on a lightguiding plate and the property that a short period diffractive grating has no diffraction orders at certain conical angles. Therefore, the out-coupling gratings on the waveguide are designed so that the optical beam coming from a certain direction can be effectively coupled out of the waveguide or be kept confined inside of the waveguide due to a total internal reflection. Then different graphical layouts can be disposed on the waveguide using, e.g., pixels having diffraction gratings with periodic lines at different orientations. Multiple substrate (waveguide) arrangements are described. | 10-01-2009 |
20090303599 | General diffractive optics method for expanding an exit pupil - This invention describes a general diffractive optics method that uses a plurality of diffractive elements on an optical substrate for expanding the exit pupil of a display of an electronic device for viewing. The method can be used for optical coupling in an optical device and it is characterized by extending of an exit pupil of an input optical beam in an output optical beam wherein the optical device comprises: an optical substrate and in-coupling, intermediate and out-coupling diffractive element disposed on the optical substrates, wherein periodic lines of the intermediate diffractive element comprise an angle ρ with periodic lines of the in-coupling and of the out-coupling diffractive elements, respectively. The system can support a broad range of rotation angles (e.g., 0<ρ<70°) and corresponding conical angles and remains geometrically accurate. | 12-10-2009 |
20100079841 | Device and a method for polarized illumination of a micro-display - A display device comprises a light source to provide an input light beam, a substrate having an input surface to form an in-coupled light beam by receiving light of the input light beam, wherein the in-coupled light beam is confined to the substrate by total internal reflections, the substrate further comprising a plurality of out-coupling features to form an illuminating light beam by diffracting light of the in-coupled light beam out of the substrate, a display element having a plurality of reflective polarization-rotating pixels arranged to form reflected light beams by reflecting light of the illuminating light beam, and imaging optics to form an image by focusing or collimating light of the reflected light beams transmitted through the out-coupling features. | 04-01-2010 |
20100165287 | Display Apparatus and Device - A near-eye display related apparatus and device is disclosed. The apparatus includes a housing configured to receive an optical engine, and a light guiding plate attached to the housing and configured to receive light representing an image from the optical engine, the light guiding plate includes a first diffractive grating adapted to incouple the light into the light guiding plate, and a second diffractive grating adapted to outcouple the light from the light guiding plate such that the light is received by an eye of a user wearing the apparatus. The light guiding plate has a contact surface portion configured to optically couple the light guiding plate to a transparent plate, The contact surface portion being adapted to be in physical contact with the transparent plate. | 07-01-2010 |
20100165465 | Color Distribution in Exit Pupil Expanders - The specification and drawings present a new apparatus and method for providing color separation in an exit pupil expander system that uses a plurality of diffractive elements for expanding the exit pupil of a display in an electronic device for viewing by introducing a selectively absorbing area or areas in the exit pupil expanders. | 07-01-2010 |
20100207964 | DISPLAYS WITH INTEGRATED BACKLIGHTING - The specification and drawings present a new apparatus and method for designing and using display devices with integrated backlight layer structure utilizing separate color diffractive out-coupling (e.g., diffraction out-coupling). A lower substrate of the display can be used to integrate the backlight component (or the backlight layer structure), thus enabling a thin module with the integrated backlighting. | 08-19-2010 |
20100214659 | DIFFRACTIVE BEAM EXPANDER AND A VIRTUAL DISPLAY BASED ON A DIFFRACTIVE BEAM EXPANDER - A diffractive beam expander ( | 08-26-2010 |
20100231693 | Stereoscopic Exit Pupil Expander Display - The specification and drawings present a new apparatus and method for providing a stereoscopic display in electronic devices with a diffractive exit pupil expander using sequentially switching between right and left images of one display (e.g., microdisplay). An optical delivery system can provide a sequential left and right image of the display and the illumination is then switched for left and right accordingly using exit pupil expander (EPE) with asymmetric, e.g., highly slanted, in-coupling gratings, sending light practically to only one direction (e.g., one area of the EPE substrate). | 09-16-2010 |
20100277803 | Display Device Having Two Operating Modes - A display device ( | 11-04-2010 |
20100302276 | Apparatus for enabling users to view images, methods and computer readable storage mediums - An apparatus including a first expander configured to provide a first image and including a first portion configured to provide a first calibration image; a second expander configured to provide a second image and including a second portion configured to provide a second calibration image; and a controller configured to control alignment of the first image and the second image, a combination of the first calibration image and the second calibration image being useable to control alignment of the first image and the second image. | 12-02-2010 |
20100315719 | Exit Pupil Expanders with Spherical and Aspheric Substrates - The specification and drawings present a new apparatus and method for using exit pupil expanders (EPE) with spherical or aspheric non-flat substrates and a plurality of diffractive elements for expanding the exit pupil of a display for viewing in order to reduce image spreading. This can also enable improved image resolution and utilization of shorter focus distances. | 12-16-2010 |
20100321781 | DEVICE FOR EXPANDING AN EXIT PUPIL IN TWO DIMENSIONS - A diffractive beam expander ( | 12-23-2010 |
20100328794 | OPTICAL APPARATUS AND METHOD - An apparatus and a method are provided. The apparatus including: a light expander configured to expand light, input into the light expander, in a first dimension, and configured to provide diverging light that diverges in the first dimension; and an optical device configured to redirect diverging light, received from the light expander, to produce converging light that converges in the first dimension. | 12-30-2010 |
20110019258 | DISPLAY DEVICE AND A METHOD FOR ILLUMINATING A LIGHT MODULATOR ARRAY OF A DISPLAY DEVICE - Illuminating light (B | 01-27-2011 |
20110019874 | DEVICE AND METHOD FOR DETERMINING GAZE DIRECTION - An eye tracker device ( | 01-27-2011 |
20110096401 | Split Exit Pupil Expander - The specification and drawings present a new apparatus and method for using a split exit pupil expander to provide general diffractive optics method that uses a plurality of diffractive elements for expanding the exit pupil of a display of an electronic device for viewing. | 04-28-2011 |
20120320460 | COLOR DISTRIBUTION IN EXIT PUPIL EXPANDERS - The specification and drawings present a new apparatus and method for providing color separation in an exit pupil expander system that uses a plurality of diffractive elements for expanding the exit pupil of a display in an electronic device for viewing by introducing a selectively absorbing area or areas in the exit pupil expander. | 12-20-2012 |
20130314789 | Optical Apparatus and Method for Expanding an Exit Pupil - A first optical arrangement is configured to couple into an apparatus a first component of a light beam having a wavelength within a first spectral range; a second optical arrangement configured to couple a second component of the light beam having a wavelength within a different second spectral range; a third optical arrangement configured to expand the first component in a first dimension to create an expanded first component; a fourth optical arrangement configured to expand, in a second dimension, the expanded first component to create a further expanded first component, and to output the further expanded first component; a fifth optical arrangement configured to expand the second component in the second dimension to create an expanded second component; and a sixth optical arrangement configured to expand, in the first dimension, the expanded second component to create a further expanded second component, and to output the further expanded second component. | 11-28-2013 |
20140064655 | NED POLARIZATION SYSTEM FOR WAVELENGTH PASS-THROUGH - A system and method are disclosed for providing uniform color distribution of light emitted from a light source to an eye box in a near eye display (NED). An example of the system and method uses an optical element including two or more waveguides optimized to different colors of the visible light spectrum. The optical element further includes one or more polarization state generators for controlling the polarization of light incident on the waveguides to facilitate coupling of light into a matched waveguide, and to impede coupling of light into unmatched waveguides. | 03-06-2014 |