Plural Modulation Cells Patents (Class 359/259)
  • Patent number: 10355440
    Abstract: The invention relates to a method for the synthesis of electromagnetic radiation, wherein electromagnetic radiation having a spectrum comprising two or more spectral components is generated and phase setting of the electromagnetic radiation is performed. The invention proposes that the phase setting comprises phase shifting of the spectral components of the electromagnetic radiation, wherein the relative phase relationship of the spectral components is predeterminable. In addition, the invention relates to an apparatus for the synthesis of electromagnetic radiation, said apparatus comprising a pulsed laser (1), which generates a sequence of temporally equidistant light pulses, wherein the spectrum of the electromagnetic radiation of the pulsed laser (1) is the spectrum of an optical frequency comb, which is characterized by an offset frequency and a repetition rate. Furthermore, the apparatus has a phase setter (5), which effects phase setting of the electromagnetic radiation of the pulses laser (1).
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: July 16, 2019
    Assignee: TOPTICA PHOTONICS AG
    Inventors: Armin Zach, Thomas A. Puppe, Thomas Hellerer
  • Patent number: 10281734
    Abstract: Optical MEMS scanning micro-mirror comprising: —a movable scanning micro-mirror (101), being pivotally connected to a MEMS body (102) substantially surrounding the lateral sides of the micro-mirror, —a transparent window (202) substantially covering the reflection side of the micro-mirror; —wherein a piezo-actuator assembly (500) and a layer of deformable transparent material (501) are provided on the outer portion of said window (202); —the piezo-actuator assembly (500) being arranged at the periphery of the layer of transparent material (501); —said piezo-actuator assembly (500) and transparent material (501) cooperating so that when actuated, the piezo-actuator assembly (500) causes micro-deformation of the transparent material (501), thereby providing an anti-speckle effect. The invention also provides the corresponding micro-projection system and method for reducing speckle.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: May 7, 2019
    Assignee: North Inc
    Inventors: Lucio Kilcher, Nicolas Abele, Faouzi Khechana
  • Patent number: 10274164
    Abstract: The invention provides a lighting device comprising a plurality of different light sources with a first subset of one or more first light sources configured to provide first light source light and a second subset of one or more second light sources configured to provide second light source light having a spectral distribution different from the first light source light, wherein the one or more first light sources have a light-source off-state color appearance, wherein the one or more second light sources comprise one or more optical filters, wherein the one or more optical filters are selected to convert less than 10% of said second light source light, wherein each optical filter is associated with a respective second light source, and wherein the one or more optical filters have the same color appearance as the off-state color appearance of the one or more first light sources.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: April 30, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Ties Van Bommel, Rifat Ata Mustafa Hikmet
  • Patent number: 10120210
    Abstract: A device and method of optical equalization using an optical modulator is provided. An electrical modulation signal is split into a first modulation signal and a second modulation signal. The second modulation signal is delayed relative to the first modulation signal. An amplitude of the second modulation signal is attenuated relative to the first modulation signal. The first modulation signal is applied to a first waveguide segment of the optical modulator. The second modulation signal that is delayed and attenuated relative to the first modulation signal is applied to a second waveguide segment of the optical modulator. Both the applied first and second modulation signals generate a feed-forward equalized optical signal that is recombined in the optical domain.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: November 6, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Nicolas Dupuis, Tam N. Huynh, Benjamin G. Lee, Jonathan E. Proesel, Renato Rimolo-Donadio, Alexander V. Rylyakov, Clint L. Schow
  • Patent number: 10108042
    Abstract: A display substrate and a display apparatus are disclosed. The display substrate includes a base substrate and a plurality of pixel units sequentially arranged on the base substrate, each of the pixel units includes a plurality of color sub-pixels; part of or all of the color sub-pixels are provided with white light-transmitting regions. Since the transmittance of the white light-transmitting regions is higher than that of the color sub-pixels, the transmittance of the display substrate is effectively improved by providing the white light-transmitting regions in the color sub-pixels, so that the transmittance of the display apparatus is also improved.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: October 23, 2018
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yubo Xu, Ming Hu
  • Patent number: 10101582
    Abstract: A hand-held electronic device including a display device and an optical film is provided. The display device includes a display light source and displays information by a display light emitted by the display light source. The optical film is disposed on the display device. The display light emitted by the display light source for displaying the information is deflected by an angle after passing through the optical film to project the information on a display surface outside the display device. A protective case for protecting the hand-held electronic device is also provided.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: October 16, 2018
    Assignee: HTC Corporation
    Inventors: I-Hsuan Lin, Chih-Kai Hu
  • Patent number: 10056225
    Abstract: A plasma etching system having a substrate support assembly with multiple independently controllable heater zones. The plasma etching system is configured to control etching temperature of predetermined locations so that pre-etch and/or post-etch non-uniformity of critical device parameters can be compensated for.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: August 21, 2018
    Assignee: LAM RESEARCH CORPORATION
    Inventors: Keith William Gaff, Harmeet Singh, Keith Comendant, Vahid Vahedi
  • Patent number: 9997560
    Abstract: A display substrate, a method for fabricating the same and a display device are disclosed.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: June 12, 2018
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yubo Xu, Ming Hu
  • Patent number: 9921415
    Abstract: Optical MEMS scanning micro-mirror comprising: —a movable scanning micro-mirror (101), being pivotally connected to a MEMS body (102) substantially surrounding the lateral sides of the micro-mirror, —a transparent window (202) substantially covering the reflection side of the micro-mirror; —wherein a piezo-actuator assembly (500) and a layer of deformable transparent material (501) are provided on the outer portion of said window (202); —the piezo-actuator assembly (500) being arranged at the periphery of the layer of transparent material (501); —said piezo-actuator assembly (500) and transparent material (501) cooperating so that when actuated, the piezo-actuator assembly (500) causes micro-deformation of the transparent material (501), thereby providing an anti-speckle effect. The invention also provides the corresponding micro-projection system and method for reducing speckle.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: March 20, 2018
    Assignee: INTEL CORPORATION
    Inventors: Lucio Kilcher, Nicolas Abele, Faouzi Khechana
  • Patent number: 9684163
    Abstract: Methods, systems, and products illuminate display devices. Light in a waveguide is frustrated to illuminate an array of picture elements.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: June 20, 2017
    Assignee: E Ink Corporation
    Inventor: Kevin A. Li
  • Patent number: 9599814
    Abstract: The optical projection system according to the invention for a display has an imaging display unit, which emits image information at least partly in the form of unpolarized light, and imaging optics, wherein the imaging optics are configured to present a virtual image of image information generated by the display unit in a display area, and wherein the imaging optics are further configured to split the light emitted by the display unit into two partial beam paths each having a different polarization, to rotate the polarization direction of at least one of the two partial beam paths and to subsequently superimpose the two partial beam paths and to present them as a virtual image display in the display area.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: March 21, 2017
    Assignee: SYPRO OPTICS GMBH
    Inventor: Eberhard Piehler
  • Patent number: 9389439
    Abstract: Provided is a spatial light modulation element comprising a substrate; a reflecting mirror that moves from an initial position relative to the substrate; an elastic member that exerts an elastic force in a direction causing the reflecting mirror to return to the original position; a support body that supports the elastic member; and an elastic support member that elastically supports the support body relative to the substrate. In the spatial light modulation element, the support body may be supported at a distance from a surface of the substrate. The spatial light modulation element may further comprise a connecting portion that connects the support body to the substrate such that the support body can move along a surface direction of the substrate.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: July 12, 2016
    Assignee: Nikon Corporation
    Inventor: Yoshihiko Suzuki
  • Patent number: 9049413
    Abstract: Dual or multi-modulation display systems comprising a first modulator and a second modulator are disclosed. 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 first and second modulator. The display system may render highlight features within a projected image by affecting a time multiplexing scheme. In one embodiment, the first modulator may be switched on a sub-frame basis such that a desired proportion of the available light may be focused or directed onto the second modulator to form the highlight feature on a sub-frame rendering basis.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: June 2, 2015
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Martin J. Richards
  • Publication number: 20150001378
    Abstract: The present invention relates to an automatic welding filter that changes from a light transmission state to a dark transmission state in response to incident welding light and includes a colour-tunable filter whose spectral transmittance can be varied to optimise the visual appearance of a welding task. The colour-tunable filter comprises at least one low twist liquid crystal cell disposed between polarisation filters having substantially parallel polarisation directions. The user is able to adjust the colour of the automatic welding filter in the dark transmission state, independently of the shade, in response to a user selected colour signal which alters the birefringence properties of the low twist liquid crystal cell.
    Type: Application
    Filed: January 15, 2013
    Publication date: January 1, 2015
    Inventors: Kristina M. Magnusson, Kenneth Jarefors
  • Publication number: 20140307301
    Abstract: Window units, for example insulating glass units (IGU's), that have at least two panes, each pane having an electrochromic device thereon, are described. Two optical state devices on each pane of a dual-pane window unit provide window units having four optical states. Window units described allow the end user a greater choice of how much light is transmitted through the electrochromic window. Also, by using two or more window panes, each with its own electrochromic device, registered in a window unit, visual defects in any of the individual devices are negated by virtue of the extremely small likelihood that any of the visual defects will align perfectly and thus be observable to the user.
    Type: Application
    Filed: January 21, 2014
    Publication date: October 16, 2014
    Applicant: View, Inc.
    Inventors: Robin Friedman, Sridhar Kailasam, Rao Mulpuri, Ron Powell, Dhairya Shrivastava
  • Publication number: 20140285429
    Abstract: A light control and display technology applicable to light redirection and projection with the capacity, in a number of embodiments modified for particular applications, to produce managed light, including advanced images. Applications include miniature to very large scale video displays, optical data processing, 3-dimensional imaging, and lens-less vision enhancement for poor night-driving vision, cataracts and macular degeneration.
    Type: Application
    Filed: March 17, 2014
    Publication date: September 25, 2014
    Inventor: John Castle Simmons
  • Publication number: 20140153077
    Abstract: An optical modulation device including: bias power supplies that output a signal having a bias voltage corresponding to the null point of an optical modulation unit to the optical modulation unit; and synchronous detection circuits that determine whether an intensity of a QAM signal at a drift non-occurrence time where no drift occurs in the bias voltage becomes larger or smaller than the intensity of the QAM signal at a drift occurrence time where a drift occurs in the bias voltage, adjust the bias voltage to maximize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes larger than the intensity of the QAM signal at the drift occurrence time, and adjust the bias voltage to minimize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes smaller than the intensity of the QAM signal at the drift occurrence time.
    Type: Application
    Filed: August 21, 2012
    Publication date: June 5, 2014
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hiroto Kawakami, Eiji Yoshida, Yutaka Miyamoto
  • Publication number: 20140098409
    Abstract: A light modulator includes a band-pass filter configured to select a wavelength of an incident light; a first layer; a second layer configured to include a trench with a bottom surface, a side surface, and a top surface; a thin metal film provided on the side surface of the trench of the second layer; and a dielectric layer provided between the first and second layers at the bottom and the top surfaces of the trench. An electric field is applied to the dielectric layer by using the first and second layers. The dielectric layer is provided between the thin metal film and the first layer at the side surface of the second layer so that the thin metal film has an anisotropic permittivity due to the electric field.
    Type: Application
    Filed: October 4, 2013
    Publication date: April 10, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Mamoru Miyawaki
  • Publication number: 20140078459
    Abstract: Disclosed is a filter for selective transmission of visible rays and infrared rays using an electrical signal. The filter comprises: a first filter for controlling the degree of absorption of visible rays by changing the molecular arrangement in accordance with the control of the electrical signal; and a second filter for controlling the degree of reflection of infrared rays by changing reflectivity in accordance with the control of the electrical signal.
    Type: Application
    Filed: October 28, 2011
    Publication date: March 20, 2014
    Inventors: Seong Jin Kim, Do Kyoon Kim, Kee Chang Lee
  • Patent number: 8643929
    Abstract: An apparatus includes an optical splitter, an optical intensity combiner, first and second Mach-Zehnder interferometers, and first and second drive electrodes. The first Mach-Zehnder interferometer connects a first optical output of the optical intensity splitter to a first optical input of the optical intensity combiner. The second Mach-Zehnder interferometer connects a second optical output of the optical intensity splitter to a second optical input of the optical intensity combiner. The first drive electrode is located between and connected to a pair of semiconductor junctions along first internal optical arms of the Mach-Zehnder interferometers. The second drive electrode is located between and connected to a pair of semiconductor junctions along second internal optical arms of the Mach-Zehnder interferometers.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: February 4, 2014
    Assignee: Alcatel Lucent
    Inventors: Douglas M. Gill, Mahmoud Rasras
  • Publication number: 20140028936
    Abstract: An optical node device includes a light receiving/emitting portion having an input port into which a signal beam is incident and an output port that emits a signal beam of a selected wavelength, a chromatic dispersion device that scatters spatially the signal beam depending on the wavelength of the signal beam, an optical coupler that focuses, onto a two-dimensional plane, beams dispersed by the chromatic dispersion device, a spatial light modulating element arranged so as to receive incident light deployed on an xy plane made up of an x-axis direction deployed according to wavelength and a y-axis direction orthogonal to the x-axis direction, and having numerous pixels arranged in a lattice on the xy plane, and a spatial light modulating element driving portion that drives electrodes of the individual pixels arranged in the xy axial directions in the spatial light modulating element.
    Type: Application
    Filed: July 10, 2013
    Publication date: January 30, 2014
    Inventors: Noboru Uehara, Yuji Hotta
  • Patent number: 8638486
    Abstract: An optical modulator includes first and second modulation waveguides, a demultiplexer, first and second phase adjustment waveguides that changes phases of a light of the first and second modulation waveguides, a multiplexer that combines light outputs from the first and second phase adjustment waveguides, a gain controller and a modulator bias controller in which voltages of the first and second modulation signals are controlled so that a result of adding light from the first modulation waveguide to light from the second modulation waveguide where light from the first modulation waveguide has a predetermined phase is equal to a result of adding light from the first modulation waveguide to light from the second modulation waveguide where light from the second modulation waveguide has a predetermined phase. A phase-adjustment bias controller that controls phase amounts changed by the first and second phase adjustment waveguides so as to cancel phase errors.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: January 28, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keisuke Matsuda, Takashi Sugihara, Keita Mochizuki, Hiroshi Aruga
  • Patent number: 8477401
    Abstract: A windshield assembly that includes a fluorescent electrowetting cell and an opaque electrowetting cell overlying a windshield and configured so the opaque electrowetting cell cooperates with the fluorescent electrowetting cell to contrast an image displayed by the fluorescent electrowetting cell with respect to a field of view beyond the windshield assembly. The ability to contrast the image makes the image easier to see when bright sunlight is present.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: July 2, 2013
    Assignee: Delphi Technologies, Inc.
    Inventors: Frederick F. Kuhlman, David K. Lambert, Dwadasi H. R. Sarma, Kris R. Stark
  • Patent number: 8456728
    Abstract: An electrowetting display, a pixel array substrate thereof, and an electrowetting display pixel structure thereof are provided. The electrowetting display pixel structure is disposed on a substrate. The electrowetting display pixel structure includes a pixel electrode, an insulating layer and a hydrophobic layer. The pixel electrode is covered with the insulating layer, and the insulating layer is covered with the hydrophobic layer. The hydrophobic layer has at least one flow guiding area, and a flowing path of a fluid medium is determined by a layout of the flow guiding area.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: June 4, 2013
    Assignee: Wintek Corporation
    Inventors: Cheng-Yi Chen, Chih-Yuan Wang
  • Publication number: 20130088765
    Abstract: Techniques and configurations are provided to generate multiple coherent optical subcarriers. A laser source generates as output a light beam at a carrier frequency. A multicarrier generator is provided that is coupled to the laser source and comprises one or more dual carrier generators each configured to modulate the light beam at the same modulation frequency or different modulation frequencies so as to output a plurality of light beams each at a different subcarrier frequency that is offset from the carrier frequency. The multicarrier generator generates the plurality of light beams on individual outputs, e.g., fibers, without the need for an optical demultiplexing filter.
    Type: Application
    Filed: October 10, 2011
    Publication date: April 11, 2013
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Thomas Duthel, James Whiteaway
  • Publication number: 20130033735
    Abstract: According to example embodiments, an electrochromic device includes pixel containing a first sub-pixel and a second sub-pixel. The first sub-pixel includes a first electrolyte contacting a first electrochromic layer. The first electrochromic layer includes a first electrochromic material configured to display each one of transparency and at least two colors, based on a voltage applied to the first electrochromic material. The second sub-pixel includes a second electrolyte contacting a second electrochromic layer. The second electrochromic layer includes a second electrochromic material configured to display each one of transparency, black, and at least one color other than black, based on a voltage applied to the second electrochromic material.
    Type: Application
    Filed: February 14, 2012
    Publication date: February 7, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang Ho Noh, Rupasree Ragini Das, Jung Woo Kim, Seog Jin Jeon
  • Publication number: 20130027651
    Abstract: In one or more embodiments, barriers for reflective pixels electrodes of display devices and methods are disclosed. In one such embodiment, a reflective spatial light modulator for a display device has a plurality of reflective pixel electrodes. Each reflective pixel electrode may include a conductor, a tantalum containing barrier over the conductor, and a conductive reflector over the conductive barrier.
    Type: Application
    Filed: July 27, 2011
    Publication date: January 31, 2013
    Inventor: Mark Meldrim
  • Patent number: 8335031
    Abstract: An optical module 1A is an optical module, which is manufactured from an SOI substrate having a support substrate 10 and a semiconductor layer 14 disposed on a surface 10a of the support substrate 10 via an insulating layer 12, the optical module including a movable mirror 22 in which a mirror surface 22a is formed on a side face intersecting with a Y-direction, that is movable in the Y-direction, a photodiode 32 which is provided on the surface 10a of the support substrate 10, and is optically coupled to the mirror surface 22a of the movable mirror 22, a cap member 34 which is provided on the surface 10a of the support substrate 10, that airtight-seals the movable mirror 22 and the photodiode 32, and an element electrode part 36 which is provided through the support substrate 10 and the insulating layer 12, and is electrically connected to the photodiode 32.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: December 18, 2012
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Yoshihisa Warashina, Tomofumi Suzuki
  • Patent number: 8320036
    Abstract: The present invention provides an apparatus that includes a waveguide and one or more pixels deployed adjacent the top surface of the waveguide which contains TIR light therein. Each pixel includes a deformable active layer having a first conductor and a driver electronics layer having a second conductor. The driver electronics layer is deployed in spaced-apart relation to the active layer and opposite the waveguide. In a quiescent state of a pixel, the active layer is in contact or near contact with the top surface of the waveguide so as to optically couple light out via FTIR (i.e., pixel's ON state). To actuate the pixel, the electronics layer is configured to selectively apply an electrical potential difference to the second conductor thereby causing the active layer to move away from the top surface so as to prevent the optical coupling of light out of the waveguide (i.e., pixel's OFF state).
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: November 27, 2012
    Assignee: Rambus Inc.
    Inventors: Kevin J. Derichs, Carey King, Daniel K. Van Ostrand, Berry Tod Cox, Reed J. Killion
  • Patent number: 8305676
    Abstract: An optical deflector includes multiple voltage-dependent refractive boundaries. Light passes through the refractive boundaries and accumulates a deflection angle. An electrode placed to apply a voltage to the boundaries may be non-uniform to modulate a wavefront as it passes. A scanning laser projector includes the optical deflector to modulate laser light.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: November 6, 2012
    Assignee: Microvision, Inc.
    Inventor: Bin Xue
  • Patent number: 8300295
    Abstract: A thin film semiconductor device includes, on a substrate, a thin film transistor of which channel is N-type, and a thin film transistor of which channel is P-type, wherein a source region of the N-type thin film transistor and a source region of the P-type thin film transistor are arranged so as to be adjacent to each other at least in some region and are electrically connected to a first electrode through one contact hole formed on the some region, and a drain region of the N-type thin film transistor and a drain region of the P-type thin film transistor are arranged so as to be adjacent to each other at least in some region and are electrically connected to a second electrode through one contact hole formed on the some region.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: October 30, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Yasushi Hiroshima
  • Patent number: 8243355
    Abstract: An optical unit for dynamically shaping a wavefront is disclosed, having light modulation cells disposed regularly in cell fields, and locally influencing partial light waves in a propagating light wavefront. Each cell field is connected to a cell controller separately adjusting the optical behavior of the light modulator cells. Serially-disposed fields, each having modulator cells, are located in the light path of the light wavefront. Cell control means adjust the modulator cells in a first cell field such that the modulator cells discretely implement a phase shift having a continuous phase value, and in a second cell field such that the modulator cells implement a prism function having a continuous directional value for the partial light waves. A focusing means for the emitted wavefront is also located in the light path of the optical unit, guiding the partial light waves at an output pupil of the optical unit.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: August 14, 2012
    Assignee: SeeReal Technologies S.A.
    Inventors: Bo Kroll, Armin Schwerdtner, Gerald Futterer
  • Patent number: 8130437
    Abstract: A color filter including a substrate, a plurality of pixel units and a transparent electrode layer is provided. The substrate has a plurality of pixel regions. Each pixel region has a plurality of first sub-pixel regions and a second sub-pixel region. Each pixel unit is disposed in one of the pixel regions corresponding thereto and includes a plurality of and a white filter film. Each color filter film is disposed in one of the first sub-pixel regions corresponding thereto and the white filter film is disposed in the second sub-pixel region. Since the area of the white filter film is larger than the area of each color filter film, the color filter has high light-transmittance. The transparent electrode layer is disposed on the pixel units. Furthermore, a color reflective display device with the color filter is disclosed.
    Type: Grant
    Filed: July 26, 2009
    Date of Patent: March 6, 2012
    Assignee: E Ink Holding Inc.
    Inventors: Po-Wen Hsiao, Yuan-Chih Tasi, Lee-Tyng Chen, Chuan-Feng Liu, Ted-Hong Shinn
  • Patent number: 8125702
    Abstract: A display has first and second spatial light modulators for modulating light from a light source. The first spatial light modulator has a plurality of elements switchable between ON and OFF states according to a pattern having a spatially-varying density. Transfer optics blur and carry light modulated by the first spatial light modulator to the second spatial light modulator to yield a light field at the second spatial light modulator. The second spatial light modulator has a plurality of elements switchable between ON and OFF states to perform temporal dithering of the light field to provide a reconstruction of the image.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: February 28, 2012
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Gregory John Ward, Gerwin Damberg, Helge Seetzen
  • Patent number: 8111444
    Abstract: An imaging method includes emitting radiation from an illumination source towards a total internal reflection (TIR) modulator. At least one of the pixel regions is controlled to form at least one image pixel on a surface. A first electric potential is imposed on a first pixel region, the first electric potential being associated with a first signal provided by a first electrical conductor to the second set of electrodes associated with the first pixel region, the first electrical conductor extending over a first non-pixel region. A second electric potential is imposed on the first pixel region, the second electric potential being associated with a second signal provided by a second electrical conductor to first set of electrodes associated with the first pixel region, the second electrical conductor extending over a second non-pixel region, wherein the second non-pixel region is different from the first non-pixel region, and the second electric potential is different from the first electric potential.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: February 7, 2012
    Assignee: Eastman Kodak Company
    Inventors: James G. Ko, Meritt W. Reynolds
  • Publication number: 20110286063
    Abstract: A device that provides light beam switching, agile steering of the light beam over a range of angles, and generation of arbitrary wavefront shapes with high spatial and temporal resolution. The agile device can include a volume diffractive structure comprising Bragg planes having one refractive index and the Bragg planes separated by regions containing an active optical medium. Electrodes (which may be the Bragg planes themselves, or may be arrayed adjacent to the active optical medium) are used to control the electric field intensity and direction across the structure, and thereby control the diffraction efficiency of the structure and the local phase delay imposed on a diffracted wavefront. Means are provided for addressing the many thousands of electrodes required for precise and rapid wavefront control. Applications include free-space atmospheric optical communications, near-eye displays, direct-view 3D displays, optical switching, and a host of other applications.
    Type: Application
    Filed: August 1, 2011
    Publication date: November 24, 2011
    Applicant: VUZIX CORPORATION
    Inventor: Stephen Paul McGrew
  • Patent number: 8052286
    Abstract: A method includes generating a plurality of beams that each illuminate a separate portion of a spatial light modulator. The spatial light modulator has a first dimension of a first length and a second dimension of a second length. Each of the beams spans a portion of the first length of the first dimension and a portion of the second length of the second dimension. The method also includes scrolling the plurality of beams along the second dimension of the spatial light modulator while maintaining at least a first gap between each of the plurality of beams.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: November 8, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Philip Scott King, Gregory James Hewlett, Roger Mitsuo Ikeda, Jeffrey Scott Farris
  • Publication number: 20110235148
    Abstract: An imaging method includes emitting radiation from an illumination source towards a total internal reflection (TIR) modulator. At least one of the pixel regions is controlled to form at least one image pixel on a surface. A first electric potential is imposed on a first pixel region, the first electric potential being associated with a first signal provided by a first electrical conductor to the second set of electrodes associated with the first pixel region, the first electrical conductor extending over a first non-pixel region. A second electric potential is imposed on the first pixel region, the second electric potential being associated with a second signal provided by a second electrical conductor to first set of electrodes associated with the first pixel region, the second electrical conductor extending over a second non-pixel region, wherein the second non-pixel region is different from the first non-pixel region, and the second electric potential is different from the first electric potential.
    Type: Application
    Filed: March 24, 2010
    Publication date: September 29, 2011
    Inventors: James G. Ko, Meritt W. Reynolds
  • Patent number: 8023170
    Abstract: A total internal reflection (TIR) modulator includes a member comprising an electro-optic material; a plurality of first electrode sets; a plurality of second electrode sets; and a first set of electrical conductors, each electrical conductor in the first set of electrical conductors being coupled to one of the second electrode sets wherein the electrodes in each second electrode set are arranged in an interdigitated relationship with the electrodes in one of the first electrode sets; and each of the first electrode sets comprises a first electrode, the first electrodes being arranged in an interdigitated relationship with the electrical conductors in the first set of electrical conductors.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: September 20, 2011
    Assignee: Eastman Kodak Company
    Inventors: James G. Ko, Meritt W. Reynolds
  • Patent number: 8014055
    Abstract: An electro-optic device includes a shift register and another circuit. Source and drain regions of transistors in the shift register contain the same kind of impurity as that contained in the source and drain regions of transistors in the other circuit and contain a higher concentration of the impurity than a concentration of the impurity in the source and drain regions of transistors in the other circuit.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: September 6, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Hiroaki Mochizuki
  • Publication number: 20110170161
    Abstract: An apparatus includes an optical splitter, an optical intensity combiner, first and second Mach-Zehnder interferometers, and first and second drive electrodes. The first Mach-Zehnder interferometer connects a first optical output of the optical intensity splitter to a first optical input of the optical intensity combiner. The second Mach-Zehnder interferometer connects a second optical output of the optical intensity splitter to a second optical input of the optical intensity combiner. The first drive electrode is located between and connected to a pair of semiconductor junctions along first internal optical arms of the Mach-Zehnder interferometers. The second drive electrode is located between and connected to a pair of semiconductor junctions along second internal optical arms of the Mach-Zehnder interferometers.
    Type: Application
    Filed: January 12, 2010
    Publication date: July 14, 2011
    Inventors: Douglas M. Gill, Mahmoud Rasras
  • Patent number: 7967445
    Abstract: An image projecting apparatus enables the formation of a projected image faithful to original image information by reducing degradation in the projected image due to decrease in imaging performance of a projection optical system. Image information is processed by an image processing device, which includes a first and a second image processor. A light modulating device modulates a flux of light emitted by an illumination optical system based on the processed image information. The modulated flux of light is projected on a screen by a projection optical system. If the image information processed by the first image processor in a pixel region is not within a representable modulation range of the light modulating device, the image information is processed by the second image processor.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: June 28, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukiko Hamano, Ryosuke Kasahara, Toshiyuki Kawasaki
  • Patent number: 7965433
    Abstract: The present invention relates to a bias controller for a dual output electro-optic modulator and a method for controlling the bias of a dual output electro-optic modulator. The invention further comprises an optical commutator switch with a plurality of dual-output electro-optic modulators interconnected in a tiered arrangement, and control means for deriving measurements of optical power from each of the modulators. The optical commutator is further used for determining respective bias control signals to achieve and maintain operation of the modulators substantially at their quadrature bias points, and further for generating said respective bias control signals for applying them to the respective modulators.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: June 21, 2011
    Assignee: BAE Systems PLC
    Inventors: Andrew James Smith, Christopher Ralph Pescod
  • Patent number: 7965439
    Abstract: A scanning device includes: an optical element in which a refractive index distribution changes according to the intensity of an electric field generated therein such that an incident laser beam is scanned; first and second electrodes provided on two opposite surfaces of the optical element; and a control unit that controls a voltage applied to at least one of the first and second electrodes such that the electric field is generated in one direction and the other direction opposite to the one direction with time in the optical element.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: June 21, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Shigeo Nojima
  • Publication number: 20110109953
    Abstract: According to particular embodiments, reducing cross-phase modulation includes sending instructions to a phase modulation array comprising channel pixel sets that modulate phases of channels. The channel pixel sets comprise a first channel pixel set that modulates a first phase of a first channel and a second channel pixel set that modulates a second phase of a second channel that uses a phase modulation format. The first channel pixel set is instructed to modulate the first phase at a first constant phase. The second channel pixel set is instructed to modulate the second phase at a second constant phase different from the first constant phase in order to create a group delay between the first channel and the second channel.
    Type: Application
    Filed: November 10, 2009
    Publication date: May 12, 2011
    Applicant: Fujitsu Limited
    Inventors: Olga I. Vassilieva, Richard L. Colter, Daniel Bihon, Paparao Palacharla
  • Patent number: 7880949
    Abstract: A display device includes a number of sub-pixels. A main region and a sub region are defined in each sub-pixel, and correspond to a first pixel electrode and a second pixel electrode respectively. The first and the second pixel electrodes are separated from each other and thereby forming a gap between the first and the second pixel electrodes substantially perpendicular to the gate lines. Each sub-pixel includes a coupling electrode, a first switching transistor, a second switching transistor and a sharing transistor. The coupling electrode is capacitively coupled with the first pixel electrode. The first switching transistor and the second switching transistor are electrically connected to a gate line, a data line, and respectively connected to the first and the second pixel electrodes. The sharing transistor is electrically connected to another gate line, the coupling electrode and the second pixel electrode.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: February 1, 2011
    Assignee: AU Optronics Corp.
    Inventors: Hui Chu-Ke, Sheng-Wen Cheng
  • Patent number: 7859753
    Abstract: A wavelength discriminating optical filter has birefringent retarders stacked between polarizing filters, in relative rotational orientations causing passband wavelengths to emerge in a polarization state aligned to a second such polarizing filter, for transmission, whereas wavelengths at orthogonal polarization states are blocked. The second polarizing filter can be a wiregrid type that reflects the blocked orthogonal component backwards along the light signal propagation path. Internal reflections are minimized while obtaining a high transmission ratio and high discrimination for the passband wavelengths, by pairing a zero-degree reflective polarizer as the second or selection polarizer, with a preceding non-zero-degree reflective polarizer. The non-zero-degree reflective polarizer can absorb the blocked orthogonal polarization components, for example using an oriented dichroic material, or a polarizing cube or the like can be provided to divert the blocked polarization component.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: December 28, 2010
    Assignee: Chem Image Corporation
    Inventor: Xinghua Wang
  • Patent number: 7859735
    Abstract: A lithography method is provided. The method includes generating a beam of radiation, patterning portions of the beam of radiation, projecting the patterned beam of radiation towards a substrate, and blocking scattered light from the beam of radiation from the substrate.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: December 28, 2010
    Assignee: ASML Holding N.V.
    Inventors: Wenceslao A. Cebuhar, Jason D. Hintersteiner, Stan Janik, Yuli Vladimirsky
  • Patent number: RE43608
    Abstract: A spatial light modulator imaging system comprises an electrically addressed spatial light modulator (EASLM 4, 30) whose optical image output is projected onto different areas of an optically addressed spatial light modulator (OASLM, 6, 8, 31) in a sequence. The OASLM carries electrodes which allow separate areas to be selectively addressed by application of a voltage whilst receiving light from the EASLM. The combined output from all areas of the OASLM forms a visible image to an observer (11). When illuminated by coherent light the OASLM may produce a holographic image, otherwise incoherent light is used to provide a two dimensional image. The OASLM in one example contains a layer of nematic liquid crystal material between two cell walls both treated with an alignment layer providing low tilt surface alignment that is parallel in opposite direction; the product of layer thickness d and material birefringence ?n approximately equals one quarter of the wavelength ? of read light (12, 37).
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: August 28, 2012
    Assignee: F. Poszat HU, LLC
    Inventors: Jonathan R Hughes, Richard J Miller
  • Patent number: RE44483
    Abstract: A projection design configured for use with a projector having a projector lens is provided. The device includes at least one pi-cell or pi-cell electro-optical modulator in combination with a wire grid polarizer mounted proximate the pi-cell(s). The design may include a cleanup polarizer between the pi-cell(s) and the wire grid polarizer and optionally a protective window between the wire grid projector and projection lens. The device may be oriented at an angle substantially differing from the axis of the projector lens. The resultant device includes spacing for airflow and can offer improved performance, particularly in heating, over designs previously available.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: September 10, 2013
    Assignee: RealD Inc.
    Inventors: Lenny Lipton, Matt Cowan