Within Display Element Patents (Class 359/277)
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Patent number: 11169517Abstract: Method and apparatus are disclosed for initiation of vehicle remote park-assist with key fob. An example vehicle includes a cabin, a human-machine interface (HMI) unit located in the cabin, and a receiver-transceiver module. The receiver-transceiver module is configured to receive a return signal including a distance indicator from a key fob and a remote park-assist (RePA) signal. The example vehicle also includes an autonomy unit configured to perform RePA based on the RePA signal. The example vehicle also includes a controller configured to receive, via the HMI unit, selections to activate RePA and utilize the key fob for transmitting the RePA signal and determine, based on the distance indicator, whether the key fob is in the cabin. The controller also is configured to, responsive to determining that the key fob is in the cabin, prevent the autonomy unit from performing RePA.Type: GrantFiled: April 1, 2019Date of Patent: November 9, 2021Assignee: Ford Global Technologies, LLCInventors: Erick Michael Lavoie, John Robert Van Wiemeersch, Ali Hassani
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Patent number: 10955718Abstract: Various embodiments herein relate to networks of electrochromic windows. The networks may be configured in particular ways to minimize the likelihood that the windows on the network draw more power than can be provided. The network may include particular hardware components that provide additional power to windows as needed. The network may also be configured to adjust how the windows therein transition to prevent overloading the network. The techniques described herein can be used to design networks of electrochromic windows that are undersized when considering the amount of power that would be needed to simultaneously transition all the windows on the network using normal transition parameters, while still allowing simultaneous transitions to occur.Type: GrantFiled: April 10, 2019Date of Patent: March 23, 2021Assignee: View, Inc.Inventors: Jose Vigano, Stephen Clark Brown, Dhairya Shrivastava
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Patent number: 10779905Abstract: Focusing optics for mode mixing may be used to homogenize different modes in an optical fiber used for surgical illumination. A vibration stage may impart mechanical motion to a condenser lens to generate a homogeneous illumination field from a coherent light source.Type: GrantFiled: January 29, 2018Date of Patent: September 22, 2020Assignee: Alcon Inc.Inventors: Cesario Dos Santos, Gerald David Bacher, Ronald Smith, Alireza Mirsepassi, Michael Papac
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Patent number: 10284816Abstract: A mechanism is described for facilitating true three-dimensional (3D) virtual imaging on computing devices. A method of embodiments, as described herein, includes computing a virtual 3D model corresponding to an object. The method may further include computing and projecting, based the virtual 3D model, a unified surface image of the object via a dynamic 3D shape component, and generating and rendering a virtual image of the object based on the unified surface image such that the virtual image is capable of floating in air.Type: GrantFiled: March 23, 2015Date of Patent: May 7, 2019Assignee: INTEL CORPORATIONInventor: Ronald T. Azuma
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Patent number: 10026363Abstract: A window display device includes a display screen provided in a transparent rear window glass pane of a vehicle, an operating device adapted to detect an action for operating the display screen, and a control device, which displays a shade on the display screen. The shade is movable to selectively open and close the display screen based on an action performed on the operating device.Type: GrantFiled: September 24, 2015Date of Patent: July 17, 2018Assignee: Toyota Shatai Kabushiki KaishaInventors: Naoto Iwakawa, Akihito Kouketsu
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Patent number: 9462215Abstract: Projector display systems comprising a light dimmer and first modulator are disclosed. The light dimmer may comprise an adjustable iris, adjustable light sources and/or LCD stack that is capable of lowering the luminance of the light source illuminated the first modulator. The first modulator may comprise a plurality of analog mirrors (e.g. MEMS array) and the second modulator may comprise a plurality of mirrors (e.g., DMD array). The display system may further comprise a controller that sends control signals to the light dimmer and first modulator. The display system may render a desired dynamic range for rendering a projected image by a combination of such control signals.Type: GrantFiled: November 3, 2014Date of Patent: October 4, 2016Assignee: Dobly Laboratories Licensing CorporationInventors: Douglas J. Gorny, Douglas Jason Darrow, Craig Todd
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Patent number: 8922871Abstract: An electrowetting display device includes: a lower substrate, a pixel electrode disposed on the lower substrate, a lower water-repellent layer disposed on the pixel electrode, a plurality of partitions disposed on the lower water-repellent layer and an oil layer disposed on the lower water-repellent layer between the partitions, and wherein the partitions include a side wall having a reverse taper structure.Type: GrantFiled: August 22, 2012Date of Patent: December 30, 2014Assignee: Amazon Technologies, Inc.Inventors: Byung Seok Choi, Seung-Jin Baek, Ji Eun Lee, Wang Su Hong
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Patent number: 8823605Abstract: An incandescent light source display includes a container and a number of incandescent light sources. The incandescent light sources are located in the container. Each of the incandescent light sources includes a first electrode, a second electrode and an incandescent element. The second electrode is spaced from the first electrode. The incandescent element is electrically connected to the first electrode and the second electrode. The incandescent element includes a carbon nanotube structure.Type: GrantFiled: December 16, 2013Date of Patent: September 2, 2014Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.Inventors: Peng Liu, Liang Liu, Kai-Li Jiang, Shou-Shan Fan
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Patent number: 8810890Abstract: A laser light shaping and wavefront controlling optical system 1 in accordance with an embodiment of the present invention comprises an intensity conversion lens 24 for converting and shaping an intensity distribution of laser light incident thereon into a desirable intensity distribution; an optical modulation device 34 for modulating the laser light emitted from the intensity conversion lens 24 so as to control a wavefront thereof; a condenser optical system 36 for converging the laser light issued from the optical modulation device 34; and an image-forming optical system 30, arranged between the optical modulation device 34 and the condenser optical system 36, having an entrance-side imaging plane between a plane 24x where the laser light emitted from the intensity conversion lens 24 attains the desirable intensity distribution and a modulation plane 34a of the optical modulation device 34 and an exit-side imaging plane on a pupil plane 36a of the condenser optical system 36.Type: GrantFiled: July 13, 2011Date of Patent: August 19, 2014Assignee: Hamamatsu Photonics K.K.Inventors: Haruyasu Ito, Takashi Yasuda
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Publication number: 20140035959Abstract: The present invention provides a light field display device (300) comprising an array of light field display elements (310) populating a display surface, each display element (310) comprising: a beam generator (522) for generating an output beam of light; a radiance modulator (524) for modulating the radiance of the beam over time; a focus modulator (530) for modulating the focus of the beam over time; and a scanner (504, 506) for scanning the beam across a two-dimensional angular field.Type: ApplicationFiled: August 4, 2012Publication date: February 6, 2014Inventor: Paul Lapstun
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Patent number: 8638275Abstract: An incandescent light source display includes a substrate, a plurality of first electrode down-leads, a plurality of second electrode down-leads and a plurality of heating units. The plurality of first electrode down-leads are located on the substrate in parallel to each other and the plurality of second electrode down-leads are located on the substrate in parallel to each other. The first electrode down-leads cross the second electrode down-leads and corporately define a grid having a plurality of cells. Each of the incandescent light sources is located in correspondence with each of the cells. Each incandescent light source includes a first electrode, a second electrode and an incandescent element. The incandescent element includes a carbon nanotube structure.Type: GrantFiled: November 13, 2009Date of Patent: January 28, 2014Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.Inventors: Peng Liu, Liang Liu, Kai-Li Jiang, Shou-Shan Fan
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Patent number: 8462420Abstract: A tunable plasmonic filter or an optical filtering method discloses plasmonic filter structure and a voltage or current source. An intensity or wavelength of light transmitted through the filter structure is modulated by the intensity of a voltage or current from the voltage or current source. The plasmonic filter structure is located between electrodes electrically connected to the voltage or current source. The plasmonic filter structure is configured such that the incident light is resonant with at least one plasmonic mode on the structure, and a predetermined wavelength will perturb the metallic plasmonic structure in surface plasmon on energy bands for the wavelength selective transmission of light.Type: GrantFiled: December 21, 2007Date of Patent: June 11, 2013Assignee: NanoLambda, Inc.Inventors: Byounghee Lee, Byung Il Choi
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Publication number: 20130107346Abstract: A laser light shaping and wavefront controlling optical system 1 in accordance with an embodiment of the present invention comprises an intensity conversion lens 24 for converting and shaping an intensity distribution of laser light incident thereon into a desirable intensity distribution; an optical modulation device 34 for modulating the laser light emitted from the intensity conversion lens 24 so as to control a wavefront thereof; a condenser optical system 36 for converging the laser light issued from the optical modulation device 34; and an image-forming optical system 30, arranged between the optical modulation device 34 and the condenser optical system 36, having an entrance-side imaging plane between a plane 24x where the laser light emitted from the intensity conversion lens 24 attains the desirable intensity distribution and a modulation plane 34a of the optical modulation device 34 and an exit-side imaging plane on a pupil plane 36a of the condenser optical system 36.Type: ApplicationFiled: July 13, 2011Publication date: May 2, 2013Applicant: HAMAMATSU PHOTONICS K.K.Inventors: Haruyasu Ito, Takashi Yasuda
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Patent number: 8106399Abstract: An electrophoretic display device includes a gate line on a substrate, a common line parallel to the gate line, a gate insulating layer on the gate line and the common line, a data line on the gate insulating layer, the data line crossing the gate line to define a pixel region, a thin film transistor connected to the gate line and the data line, the thin film transistor including a gate electrode, a semiconductor layer, a source electrode and a drain electrode, a first storage electrode extending from the common line, a first passivation layer over the thin film transistor, the gate line and the data line, the first passivation layer exposing the drain electrode, and a pixel electrode on the first passivation layer, the pixel electrode contacting the drain electrode and overlapping the gate line and the data line, wherein the pixel electrode includes a second storage electrode overlapping the first storage electrode, and the first and second storage electrodes form a storage capacitor with the gate insulatingType: GrantFiled: September 4, 2009Date of Patent: January 31, 2012Assignee: LG Display Co., Ltd.Inventor: Sung-Jin Park
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Patent number: 7967452Abstract: A projection type display apparatus is provided that is safe even when a person looks directly into a laser beam. A laser operation control unit sets the output power of at least one laser source so that intensity A (mW/mm2) of the laser beam on at least one spatial light modulation element satisfies relationship of A<686×B2 when numerical aperture B on image side of an illumination optics system is set.Type: GrantFiled: August 24, 2006Date of Patent: June 28, 2011Assignee: Panasonic CorporationInventors: Tatsuo Itoh, Kazuhisa Yamamoto, Kenichi Kasazumi, Kiminori Mizuuchi
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Publication number: 20100157408Abstract: A display device may include a substrate, a thin film layer formed on the substrate and/or having a light absorptance that varies according to an electric field applied to the thin film layer, and/or electrodes disposed to apply the electric field to the thin film layer and/or configured to change the electric field applied to the thin film layer.Type: ApplicationFiled: December 8, 2009Publication date: June 24, 2010Inventor: Hyun-jong Chung
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Publication number: 20100141556Abstract: The invention relates to an ophthalmic display comprising an optical imager both for shaping light beams emitted by a miniature screen of a light-beam generator system for generating light beams that are introduced into said imager via an inlet face, and for directing them towards the eye of the wearer so as to make it possible to view an image, an adapter being in a reference position relative to the imager, and said light-beam generator system including a connection arrangement for connection to said adapter, the connection between said system and said adapter being releasable. In the invention, said adapter is constituted by two snap-fastener hooks for housing in housings carried by said connection arrangement.Type: ApplicationFiled: October 25, 2007Publication date: June 10, 2010Inventors: Renaud Moliton, Cecile Bonafos, Benjamin Rousseau
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Patent number: 7719748Abstract: The disclosure relates to a method and apparatus for providing switching optical filter. The switching optical filter provides several functionalities at the same time. For example, the filter can be used to remove photons of undesirable wavelength, such as ultraviolet or infrared, while simultaneously switching from and between one mode to another in order to accommodate changing ambient light conditions. In one embodiment, the disclosure relates to a method for forming an optical filter, the method comprising: forming a first electrode layer on a substrate; forming an ion conductor layer to at least partially cover the first electrode layer; forming an optically transparent layer over the ion conductor layer, the optically transparent layer preventing transmission of photons having a first wavelength while transmitting photons of a second wavelength; and forming a second electrode layer to at least partially cover the optically transparent layer.Type: GrantFiled: May 20, 2008Date of Patent: May 18, 2010Assignee: Teledyne Scientific & Imaging LLCInventors: Randolph L. Hall, Rand D. Dannenberg
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Patent number: 7715082Abstract: An electrochromic switching device comprises a counter electrode, an active electrode and an electrolyte layer disposed between the counter electrode and the active electrode. The active electrode comprises at least one of an oxide, a nitride, an oxynitrides, a partial oxide, a partial nitride and a partial oxynitride of at least one of Sb, Bi, Si, Ge, Sn, Te, N, P, As, Ga, In, Al, C, Pb and I. Upon application of a current to the electrochromic switching device, a compound comprising at least one of the alkali and the alkaline earth metal ion and an element of the active electrode is formed as part of the active electrode.Type: GrantFiled: June 30, 2008Date of Patent: May 11, 2010Assignee: Soladigm, Inc.Inventors: Zhongchun Wang, Paul P. Nguyen
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Publication number: 20100046060Abstract: A tunable plasmonic filter or an optical filtering method discloses plasmonic filter structure and a voltage or current source. An intensity or wavelength of light transmitted through the filter structure is modulated by the intensity of a voltage or current from the voltage or current source. The plasmonic filter structure is located between electrodes electrically connected to the voltage or current source. The plasmonic filter structure is configured such that the incident light is resonant with at least one plasmonic mode on the structure, and a predetermined wavelength will perturb the metallic plasmonic structure in surface plasmon on energy bands for the wavelength selective transmission of light.Type: ApplicationFiled: December 21, 2007Publication date: February 25, 2010Inventors: Byounghee Lee, Byung Il Choi
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Publication number: 20090027759Abstract: There is disclosed an automatic electronic window shading (tinting) system for houses and transport vehicles such as automobiles, RV's, trains, boats and the like, to provide shading for people to protect them from exposure to harmful direct sunlight, by providing the windows of said houses and transport vehicles with display elements and light (photocell/photovoltaic) sensors. The system comprises liquid crystal, electrochromic, suspended particle device (SPD), or NanoChromics display (NCD) element attached to a part of a transparent body (such as the windows) and a liquid crystal, electrochromic, suspended particle device (SPD), or NanoChromics display (NCD) controlling semiconductor element controlling the operation of the display element.Type: ApplicationFiled: July 23, 2007Publication date: January 29, 2009Applicant: UNIVERSITY OF KUWAITInventor: Tareq Abduljalil Albahri
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Patent number: 7136213Abstract: An iterferometric modulator is formed having a dielectric with charge persistence. The interferometric modulator is addressed by a method making advantageous use of the charge persistence property, wherein the interferometric modulator is pre-charged in such a way that the pre-charging is not observable to a viewer, and the actuation voltage threshold of the imod is significantly lowered. Subsequently the interferometric modulator may be actuated with a significantly lower actuation voltage, thereby saving power.Type: GrantFiled: August 15, 2005Date of Patent: November 14, 2006Assignee: IDC, LLCInventor: Clarence Chui
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Patent number: 6903871Abstract: A three-dimensional surface shape is produced from input numerical data. The shape of a sheet elastic material is determined by the positions of a matrix of control rods. The position of each of the rods is determined by a computer-controlled system. Each rod is fitted with two pneumatically controlled locking mechanisms, one for the X coordinate and one for the Y coordinate. When both locks on a particular rod are released the rod is free to move to a new position determined by an elevator. Once all of the rods have been adjusted they are locked in position and the surface has been configured. In one application, the surface can be used as a mold for casting a replica or in another application can be used as the screen in an image projection system.Type: GrantFiled: January 9, 2002Date of Patent: June 7, 2005Inventor: Derrick John Page
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Patent number: 6897992Abstract: Disclosed is an illuminating optical unit in an image display unit for displaying an image by irradiating a GLV (spatial modulation device) with a laser beam and modulating the laser beam based on an image signal inputted to the GLV, which includes a polarized light rotation means for equally dividing a polarized light component of the laser beam into a P polarized light component and an S polarized light component, a polarized light beam splitter for separating from each other the P polarized light component and the S polarized light component equally divided by the polarized light rotation means, and an optical path difference generation means for generating an optical path difference not less than the coherence length of the laser beam between the laser beam of the P polarized light component and the laser beam of the S polarized light component.Type: GrantFiled: October 6, 2003Date of Patent: May 24, 2005Assignee: Sony CorporationInventor: Hiroki Kikuchi
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Patent number: 6865641Abstract: In one form of the invention, an apparatus for visually displaying a non-volatile message includes an integrated circuit having first circuitry. The apparatus also includes a package for the integrated circuit and a display affixed to the integrated circuit package. The first circuitry is coupled to the display and operable to be coupled to an electronic device by pins of the integrated circuit package and to write a non-volatile, visual image via the display responsive to receiving a message from the electronic device.Type: GrantFiled: August 29, 2002Date of Patent: March 8, 2005Assignee: International Business Machines CorporationInventor: Robert Christopher Dixon
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Publication number: 20040263942Abstract: The present invention provides a first pixel array and a second pixel array disposed along an optical path. The first pixel array is adapted to generate an image. The second pixel array is adapted to adjust an output luminescence of the image.Type: ApplicationFiled: June 24, 2003Publication date: December 30, 2004Inventors: Matthew Grant Lopez, Nancy Eng Wilson, John F. Wilson
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Publication number: 20040233504Abstract: The present invention is related to an optical element that carries out the full complex phase and amplitude modulation of light wave fronts. The phase modulation can be attained by changing the optical pathway (for example, by changing the thickness or introducing a relief upon the optical surface) and the amplitude modulation is carried out by blocking the light pathway, (for example, by reflecting, absorbing, attenuating, blocking, polarizing or changing the polarization of the light.Type: ApplicationFiled: December 12, 2003Publication date: November 25, 2004Inventors: Luiz Goncalves, Ronaldo Mansano, Giuseppe A. Cirino, Patricia S. P. Cardona, Patrick B. Verdonck
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Patent number: 6665108Abstract: A system for the production of a dynamic image for use in display applications includes a light source (16) which travels via a liquid crystal modulator (18) placed in the path of the light source (16). The output of the LC modulator (18) passes modulated light a lens ray (22) which itself guides light to an optically addressed spatial light modulator (24). The resulting real image from the optically addressed spatial light modulator (24) may be used in two dimensional and three dimensional displays. The addressing frame-rate of the liquid crystal modulator (18) is substantially greater than the frame-rate of the optically addressed spatial light modulator (24).Type: GrantFiled: July 9, 2002Date of Patent: December 16, 2003Assignee: Holographic Imaging LLCInventors: Carl V Brown, Maurice Stanley
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Patent number: 6580560Abstract: An apparatus and method for a laser light display projector for projecting a beam of laser light so as to produce a light pattern forming a visually perceptible light image includes a laser light source generating a substantially parallel light beam; a diffuser positioned so that the light beam passes therethrough prior to forming the visually perceptible display, the diffuser having a diffusion pattern effective for diffusing the light beam by a predetermined amount; a rotary actuator bearing the diffuser to thereby impart a rotating motion to the diffuser so that the diffusion pattern rotatably intersects the light beam; and a controller operatively connected to at least the rotary actuator to control rotational positioning of the diffuser in the light beam.Type: GrantFiled: February 1, 2002Date of Patent: June 17, 2003Inventor: William R. Benner, Jr.
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Publication number: 20030035190Abstract: A system for the production of a dynamic image for use in display applications includes a light source (16) which travels via a liquid crystal modulator (18) placed in the path of the light source (16). The output of the LC modulator (18) passes modulated light a lens ray (22) which itself guides light to an optically addressed spatial light modulator (24). The resulting real image from the optically addressed spatial light modulator (24) may be used in two dimensional and three dimensional displays. The addressing frame-rate of the liquid crystal modulator (18) is substantially greater than the frame-rate of the optically addressed spatial light modulator (24).Type: ApplicationFiled: July 9, 2002Publication date: February 20, 2003Applicant: Holographic Imaging LLCInventors: Carl V. Brown, Maurice Stanley
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Patent number: 6437919Abstract: A system for the production of a dynamic image for use in holography includes a light source (16) which travels via a liquid crystal modulator (18) placed in the path of the light source (16). The output of the LC modulator (18) passes modulated light through a lens array (22) which itself guides light to an optically addressed spatial light modulator (24). The resulting real image from the optically addressed spatial light modulator (24) may be used in holography. The addressing frame-rate of the liquid crystal modulator (18) is substantially greater than the frame-rate of the optically addressed spatial light modulator (24).Type: GrantFiled: June 13, 2000Date of Patent: August 20, 2002Assignee: Holographic Imaging LLCInventors: Carl V Brown, Maurice Stanley
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Patent number: 6388797Abstract: A pair of stereoscopic eyewear includes an element for integral assembly with the eyewear including a conductive circuit trace. The conductive pattern provides electrical contact between a contact area of the frame (which is hardwired to an electrical cable) and the contact pads of the liquid crystal shutter pair. Preferably, a conductive elastomer is used to facilitate the electrical contact to the shutters and the frame. Additionally, each wire of the cable is terminated with a fixed electrical contact adapted to securely mate with a slot in the frame that correspond to the contact area. A lens assembly attaches to the frame to rigidly hold the frame, the shutters and the conductive trace in intimate juxtapostion.Type: GrantFiled: October 22, 1999Date of Patent: May 14, 2002Assignee: StereoGraphics CorporationInventors: Lenny Lipton, Jeffrey James Halnon, William McKee
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Patent number: 6359723Abstract: A system for producing modulated light is disclosed. The system comprises a spatial light modulator including a light modulating medium switchable between different states so as to act on light in ways which form overall patterns of modulated light. The system also includes an arrangement for switching the modulating medium between the different states in a controlled way and an illumination arrangement for producing a source of light. The system further includes an optics arrangement for directing light from the source of light into the spatial light modulator and for directing light from the spatial light modulator through a predetermined source imaging area. The optics arrangement cooperates with the illumination arrangement and the spatial light modulator so as to produce a real image of the source of light within the source imaging area such that an individual is able to view a virtual image of the overall patterns of modulated light from the source imaging area.Type: GrantFiled: December 13, 2000Date of Patent: March 19, 2002Assignee: Displaytech, Inc.Inventors: Mark A. Handschy, Michael R. Meadows, Holden Chase
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Patent number: 6130774Abstract: An electrophoretic display element includes a capsule having a first, larger surface and a second, smaller surface. The capsule contains a suspending fluid and at least one particle dispersed within said suspending fluid. Application of a first electrical field causes the particle or particles to migrate towards the first, larger surface of the capsule, causing it to take on the visual appearance of the particles. Application of a second electrical field causes the particle or particles to migrate towards the second, smaller surface, allowing the capsule to take on the visual appearance of the dispersing fluid or of a substrate or electrode positioned behind the display element. Displays may be fabricated from multiple display elements arranged on a substrate.Type: GrantFiled: April 27, 1999Date of Patent: October 10, 2000Assignee: E Ink CorporationInventors: Jonathan D. Albert, Barrett Comiskey
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Patent number: 6055086Abstract: A method and apparatus for modulating a light beam in an optical processing system is described. Preferably, an electrically-controlled polarizer unit and/or an analyzer unit are utilized in combination with a spatial light modulator and a controller. Preferably, the spatial light modulator comprises a pixelated birefringent medium such as a liquid crystal video display. The combination of the electrically controlled polarizer unit and analyzer unit make it simple and fast to reconfigure the modulation described by the Jones matrix of the spatial light modulator. A particular optical processing objective is provided to the controller. The controller performs calculations and supplies control signals to the polarizer unit, the analyzer unit, and the spatial light modulator in order to obtain the optical processing objective.Type: GrantFiled: July 27, 1998Date of Patent: April 25, 2000Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Colin Soutar, Richard D. Juday
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Patent number: 5949569Abstract: A projection display apparatus includes a light source, a spatial light modulation device, a condenser lens, an aperture stop, and a projecting lens. When the spatial period of complex amplitude modulation in the spatial light modulation device is represented by p, the center wavelength of the incident light is represented by .lambda., and a half angle subtended by an area around an opening edge of the aperture stop at the condenser lens along the first direction is represented by .theta.asx, parameters of the light source, the spatial light modulation device, the condenser lens, the screen, the aperture stop and the projecting lens and a relative positional relationship therebetween are defined such that the following condition is satisfied:0.35<.theta.asx/arcsin(.lambda./p)<0.6.Type: GrantFiled: February 7, 1997Date of Patent: September 7, 1999Assignee: Kabushiki Kaisha ToshibaInventor: Kei Shimura
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Patent number: 5859735Abstract: An optical element (8) is provided on a substrate, for example a display screen (3) of a display device (1), which optical element comprises a light-transmitting layer whose transmission in the visible region varies in response to a change in ambient light. The optical element (8) is characterized in that it further comprises a colored coating which selectively absorbs light in the visible region. The colored coating has such an absorption characteristic that the color coordinates (x;y) of the combination of the light-transmitting layer and the colored coating vary in such a way, as a result of a variation in ambient light, that a line, which interconnects the color coordinates, is partly situated in an elliptical area with achromatic point (0.333;0.333) in the color triangle, which ellipse comprises a major axis and a minor axis, which major axis terminates in (0.30;0.28) and (0.36;0.38) and the eccentricity of which ranges between 2 and 3.Type: GrantFiled: February 18, 1997Date of Patent: January 12, 1999Assignee: U.S. Philips CorporationInventor: Gosse C. De Vries
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Patent number: 5859728Abstract: A method and apparatus for modulating a light beam in an optical processing system is described. Preferably, an electrically-controlled polarizer unit and/or an analyzer unit are utilized in combination with a spatial light modulator and a controller. Preferably, the spatial light modulator comprises a pixelated birefringent medium such as a liquid crystal video display. The combination of the electrically controlled polarizer unit and analyzer unit make it simple and fast to reconfigure the modulation described by the Jones matrix of the spatial light modulator. A particular optical processing objective is provided to the controller. The controller performs calculations and supplies control signals to the polarizer unit, the analyzer unit, and the spatial light modulator in order to obtain the optical processing objective.Type: GrantFiled: October 24, 1994Date of Patent: January 12, 1999Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Soutar Colin, Richard D. Juday
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Patent number: 5617243Abstract: An electro-optical system such as an image display system and a method of displaying images are described. Laser beams of three primary colors are emitted from three lasers in a time sharing mode. These laser beams are directed onto the same optical path and then separately given optical information from the same optical modulating device in accordance with images of the respective primary colors. By this structure, displacement of constituent color images can be effectively avoided.Type: GrantFiled: June 5, 1995Date of Patent: April 1, 1997Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Yasuhiko Takemura
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Patent number: 5218469Abstract: A technique for reducing interpixel crosstalk by selecting particular illumination conditions and thus tailoring a portion of the spatial frequency response of an optical image bar. A desirable frequency response is one that approximates sin(.pi.Pf) for absolute values of f less than about 1/P, where f is the spatial frequency and P is the minimum pixel pitch. A skew angle of zero and a grazing angle that is approximately twice the interorder diffraction angle provides the desired cutoff of the response for absolute values of f above about 1/P. The desired frequency response for absolute values of f near zero can be achieved by selecting appropriate values for other physical parameters.Type: GrantFiled: December 31, 1991Date of Patent: June 8, 1993Assignee: Xerox CorporationInventor: David L. Hecht
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Patent number: 5170281Abstract: A spatial light modulator includes an electro-optic crystal plate and a mesh electrode for capturing secondary electrons emitted from the crystal plate. Primary electrons carrying an image corresponding to an input optical image are incident on the front surface of the crystal plate to write a charge pattern thereon. In a writing operation, a dc voltage and a ramp voltage is applied to the mesh electrode and the back surface of the crystal plate, respectively. The dc voltage and a variation range of the ramp voltage are shifted to obtain a desired input/output characteristic of the device. Alternatively, a decreasing rate of the ramp voltage is changed to obtain a desired characteristic.Type: GrantFiled: April 8, 1991Date of Patent: December 8, 1992Assignee: Hamamatsu Photonics K.K.Inventors: Yuji Kobayashi, Tsutomu Hara, Haruyoshi Toyoda
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Patent number: 5115228Abstract: The present invention accomplishes the above objects by employing a display having the capability to emit light and form images viewable from both the front and back of the display. The invention also shutters the images displayed on the front and back of the display so that the images can be correctly displayed depending on the viewpoint of the viewer. Text and images displayed such that they are seen from both the front and back of the display appear differently to the front and rear viewer. Electronic shutters are placed between the display and both the front and rear viewers so that they can be flashed on and off fast enough to provide a stable image appearing to each viewer. The shutters also flash slow enough so that display data can be rewritten to provide each viewer with a correct image. The correct image can be either the corrected image of that image seen by the opposing viewer, or a completely separate image. In this way, simultaneous images appear to both the front and rear viewer.Type: GrantFiled: August 2, 1990Date of Patent: May 19, 1992Assignee: International Business Machines CorporationInventors: Richard H. Harris, Richard G. Minor, Robert W. Price