Optical Modulator Patents (Class 359/237)
  • Patent number: 11169394
    Abstract: To provide a naked-eye type stereoscopic display device which can achieve a fine stereoscopic display property while achieving high-definition display and high yield. Aperture parts of sub-pixels neighboring to a first direction include overlapping regions which overlap in a second direction and a non-overlapping region which does not overlap. Provided that a width of the aperture part in the second direction is defined as a longitudinal aperture width, the non-overlapping region includes an aperture width fluctuating region where the longitudinal aperture width changes continuously from roughly a center of the aperture part towards both ends of the first direction, respectively. The sum of the longitudinal aperture widths of the two overlapping regions overlapping with each other at a same position in the first direction is larger than the longitudinal aperture width in roughly the center of the aperture part.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: November 9, 2021
    Assignee: TIANMA MICROELECTRONICS CO., LTD.
    Inventors: Takuya Asai, Koji Shigemura
  • Patent number: 11163175
    Abstract: The present disclosure concerns a device for forming a field intensity pattern in the near zone, from electromagnetic waves which are incident on said device. Notably, such a device allows confining electromagnetic waves, which are incident on the device, into beams of radiation in the near zone. It comprises at least one layer of dielectric material, which surface has at least one abrupt change of level forming a step. A lower and lateral part of said surface with respect to said step is in contact with a substance having a refractive index lower than that of said dielectric material. For an incident electromagnetic wave impinging upon the device in the vicinity of such a step, the corresponding step of index it encounters produces a complex electromagnetic phenomenon, which allows generating low-dispersive condensed beams and specific field patterns in the near zone.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: November 2, 2021
    Assignee: INTERDIGITAL CE PATENT HOLDINGS
    Inventors: Artem Boriskin, Laurent Blonde
  • Patent number: 11159706
    Abstract: There is disclosed a camera module manufacturing apparatus for joining together a lens unit that incorporates a taking lens and a sensor board to which an image sensor is attached. The camera module manufacturing apparatus includes an optical unit including a collimator lens and a measurement chart for forming an image of the measurement chart on the image sensor through the taking lens. The relative position of the lens unit and the sensor board is adjusted based on an image signal obtained by converting, using the image sensor, an image of the measurement chart that is formed on the image sensor by the optical unit. The measurement chart is disposed to be tilted with respect to a plane that is perpendicular to an optical axis of the collimator lens.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: October 26, 2021
    Assignees: PFA Corporation, TECHNO HORIZON CO., LTD., SHINKAWA LTD.
    Inventors: Tsukasa Yamamoto, Fujio Asano, Hideho Miyake, Koji Imagawa, Hiroki Takagaki, Shingo Natori
  • Patent number: 11150507
    Abstract: An optical composite film includes a reflection grating film layer, an optically-uniaxial optical film layer, and a substrate layer. The optically-uniaxial optical film layer includes a plate-shaped portion and a plurality of refraction portions, where the plate-shaped portion is disposed on the reflection grating film layer, the plurality of refraction portions is disposed on a side of the plate-shaped portion away from the reflection grating film layer, the plurality of refraction portions is selected from one type of camber columns and quadrangular prisms, and an extraordinary light refractive index of the optically-uniaxial optical film layer is less than an ordinary light refractive index of the optically-uniaxial optical film layer; and the substrate layer is stacked on a side of the plate-shaped portion close to the refraction portion.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: October 19, 2021
    Assignees: HKC Corporation Limited, CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Chih Tsung Kang
  • Patent number: 11130391
    Abstract: A vehicle may have optical structures such as windows and mirrors that have the potential to allow glare from external objects to shine into the eyes of a driver or other vehicle occupant. A control circuit may gather information on where the eyes of the driver are located using a camera mounted in the vehicle and may gather information on where the sun or other source of glare are located outside of the vehicle. Based on this information, the control circuit may direct a light modulator on a window or mirror to selectively darken an area that prevents the glare from reaching the eyes of the driver. The light modulator may have a photochromic layer that is adjusted by shining light onto the photochromic layer, may be a liquid crystal modulator, an electrochromic modulator, or other light modulator layer.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: September 28, 2021
    Inventors: Hyungryul J. Choi, Arthur Y. Zhang, Cheng Chen, Graham B. Myhre, Malcolm J. Northcott, Matheen M. Siddiqui, Russell Y. Webb, Matthew E. Last
  • Patent number: 11086231
    Abstract: A method for describing an array of elements includes the steps of providing an array description system that includes a library of possible alternative designations; and describing the array of elements using at least one of the alternative designations. The library of possible alternative designations includes one or more of the following (i) a line designation, (ii) a column designation, (iii) a square designation, (iv) a rectangle designation, (v) a cross designation, (vi) a diagonal designation, (vii) a complex designation, (viii) a mosaic designation, (ix) an overlap designation, (x) a power designation, (xi) a border designation, (xii) a corner flip designation, (xiii) a mirror image designation, (xiv) a repeat designation, and (xv) a glide designation.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: August 10, 2021
    Inventor: Shane R. Palmer
  • Patent number: 11082143
    Abstract: A full duplex communication network includes an optical transmitter end having a first coherent optics transceiver, an optical receiver end having a second coherent optics transceiver, and an optical transport medium operably coupling the first coherent optics transceiver to the second coherent optics transceiver. The first coherent optics transceiver is configured to simultaneously transmit a downstream optical signal and receive an upstream optical signal. The second coherent optics transceiver is configured to simultaneously receive the downstream optical signal from the first coherent optics transceiver and transmit the upstream optical signal first coherent optics transceiver. At least one of the downstream optical signal and the upstream optical signal includes at least one coherent optical carrier and at least one non-coherent optical carrier.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: August 3, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Zhensheng Jia, Luis Alberto Campos, Jing Wang, Mu Xu, Haipeng Zhang, Curtis Dean Knittle
  • Patent number: 11074876
    Abstract: To provide a naked-eye type stereoscopic display device which can achieve a fine stereoscopic display property while achieving high-definition display and high yield. An aperture part includes overlapping regions which overlap with an aperture part or another aperture part neighboring to each other in a second direction and a non-overlapping region which does not overlap. Provided that a light amount emitted from a linear aperture of the aperture part in parallel to a second direction is “longitudinal light amount”, the non-overlapping region includes longitudinal light amount fluctuating regions where the longitudinal light amount changes continuously from roughly a center of the aperture part towards both ends of the first direction, respectively. The sum of the longitudinal light amounts of the two overlapping regions overlapping with each other at a same position in the first direction is larger than the longitudinal light amount in roughly the center of the aperture part.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: July 27, 2021
    Assignee: TIANMA MICROELECTRONICS CO., LTD.
    Inventors: Takuya Asai, Koji Shigemura
  • Patent number: 11005569
    Abstract: An optical data transmitter comprising two or more serially connected optical modulators, each driven using a respective DAC. The digital signals applied to the individual DACs are produced using different respective subsets of the set of bitstreams representing the digital waveform or data stream to be transmitted, with the bitstream subsets being selected, e.g., such that (i) each of the individual DACs is able to support the digital resolution and sampling rate needed for properly handling the subset of bitstreams applied thereto and (ii) differences between average driving powers applied to different optical modulators are relatively small. In different embodiments, the two or more serially connected optical modulators can be arranged for generating optical communication signals of different modulation formats, e.g., PSK, ASK, PAM, IM, and QAM. Some embodiments can advantageously be used for generating optical communication signals employing constellations of relatively large sizes, e.g.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: May 11, 2021
    Assignee: NOKIA SOLUTIONS AND NETWORKS OY
    Inventors: Joon Ho Cho, Xi Chen
  • Patent number: 10998981
    Abstract: An apparatus measures the transverse profile of vectorial optical field beams, including at least the directional intensity complex amplitude and the polarization spatial profile. The apparatus contains a polarization separation module, a weak perturbation module, and a detection module. Characterizing the transverse profile of vector fields provides an optical metrology tool for both fundamental studies of vectorial optical fields and a wide spectrum of applications, including microscopy, surveillance, imaging, communication, material processing, and laser trapping.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: May 4, 2021
    Assignee: University of South Florida
    Inventor: Zhimin Shi
  • Patent number: 10979149
    Abstract: An elementary device for coherently recombining a first elementary beam and a second elementary beam, includes a first input and a second input, into which are respectively injected the first elementary beam and the second elementary beam to be recombined, an output that delivers an output beam corresponding to the coherent recombination of the first and second elementary beams, a delay line placed on one of the paths of said elementary beams and configured to induce a variable delay on said path, a variable coupler comprising a first 2×2 combiner, a phase modulator and a second 2×2 combiner, a control detector configured to generate, from the complementary beam, an error signal (?), a feedback loop configured to determine, from the error signal, the delay and the phase difference to be applied.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: April 13, 2021
    Assignee: THALES
    Inventors: Jérôme Bourderionnet, Arnaud Brignon, Arnaud Le Kernec, Michel Sotom, Anaëlle Maho
  • Patent number: 10948647
    Abstract: Unidirectional grating-based backlighting includes a light guide and a diffraction grating at a surface of the light guide. The light guide is to guide a light beam and the diffraction grating is configured to couple out a portion of the guided light beam using diffractive coupling and to direct the coupled-out portion away from the light guide surface as a primary light beam at a principal angular direction. The unidirectional grating-based backlighting further includes a reflective island in the light guide between the light guide surface and an opposite surface of the light guide to reflectively redirect a diffractively produced, secondary light beam out of the light guide in a direction of the primary light beam.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: March 16, 2021
    Assignee: LEIA INC.
    Inventor: David A. Fattal
  • Patent number: 10917630
    Abstract: Disclosed is a stereoscopic image display device which separates views from each other to reduce crosstalk and minimizes reduction in brightness due to decrease of an opening area of sub-pixels. The stereoscopic image display device includes a display panel including first and second sub-pixels arranged in parallel in the horizontal direction in each of regions formed by intersecting a plurality of gate lines and a plurality of data lines, openings for opening a part of each of the first and second sub-pixels in a light-shielding pattern configured to shield regions of the first and second sub-pixels other than the openings, and a parallax unit located on the display panel and including a plurality of lenses.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: February 9, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: You-Yong Jin, Byung-Joo Lee, Hee-Jin Im, Tae-Young Heo, Jin-Hyuk Jang, Won-Sik Lee
  • Patent number: 10898066
    Abstract: The light adjustment apparatus of the present embodiment comprises a light adjustment part, a rotation axis body that supports a rotation arm that places and removes the light adjustment part in and out of a light path by swinging, and has a magnet installed therein, an electromagnetic drive source that forms a magnetic circuit including the rotation axis body on the circuit, and works an electromagnetic force on the magnet to rotate a rotational axis of the rotation axis body, and a float prevention part that magnetically restricts the rotation axis body, and prevents the rotation axis body from floating towards an axial direction of the rotational axis when the rotation axis body is rotated.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: January 26, 2021
    Assignee: OLYMPUS CORPORATION
    Inventor: Tatsuhiko Okita
  • Patent number: 10892829
    Abstract: A communication network includes an optical hub having a first coherent optics transceiver, a fiber node having a second coherent optics transceiver, an optical transport medium operably coupling the first coherent optics transceiver to the second coherent optics transceiver, a first optical circulator disposed at the optical hub, and a second optical circulator disposed at the fiber node. The first coherent optics transceiver is configured to (i) transmit a downstream optical signal at a first wavelength, and (ii) receive an upstream optical signal at the first wavelength. The second coherent optics transceiver is configured to (i) receive the downstream optical signal from the first coherent optics transceiver at the first wavelength, and (ii) transmit the upstream optical signal at the first wavelength. The first and second optical circulators are configured to separate the downstream optical signal from the upstream optical signal.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: January 12, 2021
    Assignee: Cable Television Laboratories, Inc
    Inventors: Zhensheng Jia, Luis Alberto Campos, Jing Wang
  • Patent number: 10877350
    Abstract: Embodiments may relate to a segment driver that is to be coupled with a modulator segment of a Mach-Zehnder modulator. The segment driver may include a continuous-time linear equalizer (CTLE) incorporated within an amplifier stage of the modulator. The CTLE may be configured to identify an electrical signal that is related to an optical signal of the Mach-Zehnder modulator; reduce inter-symbol interference (ISI) of the electrical signal to generate a processed electrical signal; and output the processed electrical signal to the amplifier stage. Other embodiments may be described or claimed.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: December 29, 2020
    Assignee: Intel Corporation
    Inventors: Syed S. Islam, Raghuram Narayan, Syed Reza Bahadur, Bharadwaj Parthasarathy
  • Patent number: 10871687
    Abstract: The present invention provides a display device, including a first display panel, a second display panel, and a plurality of first lenses. The first display panel has a light emitting surface and includes a plurality of first sub-pixels. Each of the first sub-pixels has a first sub-pixel width. The second display panel is located at one side of the light emitting surface of the first display panel and includes a plurality of second sub-pixels. Each of the second sub-pixels has a second sub-pixel width. The first lenses are disposed between the first display panel and the second display panel. Each of the first lenses has a first diameter, and the first diameter is smaller than the second sub-pixel width.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: December 22, 2020
    Assignee: AU OPTRONICS CORPORATION
    Inventors: Hui Chu-Ke, Sheng-Wen Cheng
  • Patent number: 10866437
    Abstract: The present disclosure relates to use of a quaternary molybdenum/tungsten tellurite crystal and a device thereof. The quaternary molybdenum/tungsten tellurite crystal is used as an acousto-optic material, wherein the quaternary molybdenum/tungsten tellurite comprises tellurium (Te) and tungsten (W), or tellurium (Te) and molybdenum (Mo). The crystal has abundant kinds, is non-toxic, and includes high, medium and low symmetry crystal systems; it easily produces a large-size and high-quality single crystal and almost meets all requirements of excellent acousto-optic properties. In the present disclosure, by selecting different light transmission directions and excitation source directions to fabricate an acousto-optic device with practical application values according to the requirements of the crystal acousto-optic device and the crystal characteristics, high-performance acousto-optic Q switching laser output is achieved.
    Type: Grant
    Filed: September 30, 2017
    Date of Patent: December 15, 2020
    Assignee: SHANDONG UNIVERSITY
    Inventors: Xutang Tao, Zeliang Gao, Youxuan Sun, Qian Wu
  • Patent number: 10824042
    Abstract: An electro-optic display includes a layer of electro-optic material, at least one conductor, and an adhesive material between the layer of electro-optic material and the at least one conductor. At least one of the electro-optic material and adhesive material comprises a composite material that includes a polymer phase and a filler phase, the filler phase having a conductivity greater than or equal to 0.5×103 S/m, a ratio of the coefficient of thermal expansion of the filler to the polymer is less than or equal to 0.5, and a concentration of the filler phase in the composite material is greater than or equal to a filler concentration corresponding to a conductivity transition point of the composite material.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: November 3, 2020
    Assignee: E Ink Corporation
    Inventor: Karl Raymond Amundson
  • Patent number: 10825936
    Abstract: A device for detecting electromagnetic radiation includes at least one thermal detector, placed on a substrate; an encapsulating structure forming a cavity housing the thermal detector, including at least one thin encapsulating layer; and at least one Fabry-Perot interference filter, formed by first and second semi-reflective mirrors that are separated from each other by a structured layer. A high-index layer of one of the semi-reflective mirrors is at least partially formed from the thin encapsulating layer.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: November 3, 2020
    Assignee: Commissariat a l'energie atomique et aux energies alternatives
    Inventors: Laurent Frey, Salim Boutami, Jean-Jacques Yon
  • Patent number: 10809456
    Abstract: A photonic system may include a PIC and an interposer. The PIC may include a first SiN waveguide. The interposer may include second and third SiN waveguides substantially vertically aligned with the first SiN waveguide in an overlap region of a first waveguide stack that may include the first, second, and third waveguides in the first waveguide stack. Within the overlap region, the second SiN waveguide may include vertical tapering that increases a thickness of the second SiN waveguide from an initial thickness to an increased thickness toward the first SiN waveguide. The first waveguide stack may further include a non-overlap region in which the interposer does not overlap the PIC. The non-overlap region may include the second and third SiN waveguides. Within the non-overlap region, the second SiN waveguide may maintain the increased thickness and the second and third SiN waveguides may include a first lateral bend.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: October 20, 2020
    Assignee: II-VI Delaware Inc.
    Inventor: Jin-Hyoung Lee
  • Patent number: 10788728
    Abstract: In accordance with an embodiment of the present disclosure, there is provided a compact method for beam steering using a layer of transparent, electro-optical material sandwiched between two layers of conductive transparent material, which provides a voltage-controlled light beam steering system without any moving parts.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: September 29, 2020
    Assignee: TDK Corporation
    Inventor: Ebrahim Forati
  • Patent number: 10761396
    Abstract: Optical modulators are described having a Mach-Zehnder interferometer and a pair of RF electrodes interfaced with the Mach-Zehnder interferometer in which the Mach-Zehnder interferometer comprises optical waveguides formed from semiconductor material. The optical modulator also comprises a ground plane spaced away in a distinct plane from transmission line electrodes formed from the association of the pair of RF electrodes interfaced with the Mach-Zehnder interferometer. The ground plane can be associated with a submount in which an optical chip comprising the Mach-Zehnder interferometer and the pair of RF electrodes is mounted on the submount with the two semiconductor optical waveguides are oriented toward the submount. Methods for forming the modulators are described.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: September 1, 2020
    Assignee: NeoPhotonics Corporation
    Inventors: Chengkun Chen, Maxime Poirier, Raghuram Narayan, Milind Gokhale, Marcel G. Boudreau
  • Patent number: 10747031
    Abstract: An optical phase modulation device for modulating a phase of an input light signal at a modulation frequency is provided, which can be used in integrated photonics applications. The device can include an optical phase modulator, for example a thermo-optic phase shifter having an effective refractive index that depends linearly temperature, configured to impart a phase shift to the input light signal, the phase shift varying quadratically in response to an applied modulating electric drive signal. The device can also include a phase modulator driver configured to apply the electric drive signal to the optical phase modulator, the electric drive signal having a time-varying component oscillating at half the modulation frequency and no time-constant component, thereby imparting the phase shift, modulated at the modulation frequency, to the phase of the input light signal to produce a phase-modulated light signal. Optical phase modulation systems and methods are also disclosed.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: August 18, 2020
    Assignee: TeraXion Inc.
    Inventor: André Babin
  • Patent number: 10735097
    Abstract: A full duplex communication network includes an optical transmitter end having a first coherent optics transceiver, an optical receiver end having a second coherent optics transceiver, and an optical transport medium operably coupling the first coherent optics transceiver to the second coherent optics transceiver. The first coherent optics transceiver is configured to (i) transmit a downstream optical signal at a first wavelength, and (ii) simultaneously receive an upstream optical signal at a second wavelength. The second coherent optics transceiver is configured to (i) receive the downstream optical signal, and (ii) simultaneously transmit the upstream optical signal. The first wavelength has a first center frequency separated from a second center frequency of the second wavelength.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: August 4, 2020
    Assignee: Cable Television Laboratories, Inc
    Inventors: Zhensheng Jia, Luis Alberto Campos, Jing Wang, Mu Xu, Haipeng Zhang, Curtis Dean Knittle
  • Patent number: 10731964
    Abstract: A multi-beam optical phased array on a single planar waveguide layer or a small number of planar waveguide layers enables building an optical sensor that performs much like a significantly larger telescope. Imaging systems use planar waveguides created using micro-lithographic techniques. These imagers are variants of “phased arrays,” common and familiar from microwave radar applications. However, there are significant differences when these same concepts are applied to visible and infrared light.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: August 4, 2020
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Benjamin F. Lane, Steven J. Spector, Alan X. Zhou, Julian A. Brown, Michael G. Moebius
  • Patent number: 10707645
    Abstract: In one example, a method includes outputting, by a power supply and across a supply node and a ground node, a supply power signal; and selectively outputting, by a driver, a power signal to a second terminal of a light emitting element that has a first terminal and the second terminal, wherein the first terminal of the light emitting element is coupled to a load node, wherein a supply terminal of the driver is coupled to the supply node, wherein a ground terminal driver is coupled to the ground node, and wherein a difference between a potential of the supply node and a potential of the ground node is less than an activation voltage of the light emitting element.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: July 7, 2020
    Assignee: Infineon Technologies AG
    Inventors: Herwig Wappis, Fabrizio Cortigiani
  • Patent number: 10690911
    Abstract: A head-up display device includes: an image formation unit which emits light including image information; and a projection optical system including an ocular optical system which displays a virtual image by reflecting the light emitted from the image formation unit. The ocular optical system includes spherical lenses, a free-form curved surface lens, a reflection mirror, and a free-form curved surface mirror, and is configured by arranging, in a space on the side of the ocular optical system of a plane conjugate with the virtual image plane with respect to the ocular optical system, a first small lens system which achieves first focus position movement and on which separated light from the image formation unit is made to be incident, and a second small lens system which achieves second focus position movement and on which separated light from the image formation unit is made to be incident.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: June 23, 2020
    Assignees: MAXELL, LTD., HITACHI INDUSTRY & CONTROL SOLUTIONS, LTD.
    Inventors: Masahiko Yatsu, Koji Hirata, Kazuomi Kaneko
  • Patent number: 10684311
    Abstract: The disclosure includes an electro-optical sensor. The electro-optical sensor includes a test signal input to receive a test signal from a device under test (DUT). A bias circuit is employed to generate a bias signal. The electro-optical sensor also includes a Mach-Zehnder Modulator (MZM) that employs an optical input, an optical output, and a bias input. The MZM is configured to receive an optical carrier signal via the optical input. The MZM also receives both the test signal and the bias signal on the bias input. The MZM modulates the test signal from the bias input onto the optical carrier to generate an optical signal while operating in a mode selected by the bias signal. The MZM also outputs the optical signal over the optical output.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: June 16, 2020
    Assignee: Tektronix, Inc.
    Inventors: Michael J. Mende, Richard A. Booman
  • Patent number: 10684470
    Abstract: A lens system includes a first lens array assembly including a first plurality of cells, each cell of the first plurality of cells configured to exhibit a pair of first Fourier transform lenses, and a second lens array assembly including a second plurality of cells, each cell of the second plurality of cells configured to exhibit a pair of second Fourier transform lenses. The first and second lens array assemblies are positioned relative to one another along an optical axis of the lens system such that light diverging from an object at a plane disposed at an object conjugate distance from the first lens array assembly reconverges at an image plane after passing through the first and second lens array assemblies. The image plane is disposed at an image conjugate distance from the second lens array assembly in accordance with the object conjugate distance.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: June 16, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Karlton D. Powell
  • Patent number: 10637207
    Abstract: A driver circuit 11 includes a plurality of cascode-connected NMOS transistors, a modulating signal VGN1 is applied to a gate terminal of a lowermost stage transistor TN1 located at a lowermost stage out of the NMOS transistors, and an upper stage bias potential VGN2 that is a sum of a minimum gate-source voltage VGN1min and a maximum drain-source voltage VDS1max of a transistor (TN1) located immediately below an upper stage transistor located at an upper stage above the lowermost stage transistor of the NMOS transistors is applied to the upper stage transistor TN2.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: April 28, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Toshiki Kishi, Munehiko Nagatani, Shinsuke Nakano, Hiroaki Katsurai, Masafumi Nogawa, Hideyuki Nosaka
  • Patent number: 10634970
    Abstract: An electrochromic element including: a first electrode; a second electrode that is opposed to and apart from the first electrode; and an electrolyte that is between the first electrode and the second electrode, wherein the first electrode includes a polymerized product of an electrochromic composition that includes a radical-polymerizable compound including a triarylamine backbone, and wherein the second electrode includes a compound represented by General Formula (I) where R1 and R2 each denote a hydrogen atom, an aryl group including 14 or less carbon atoms, a heteroaryl group including 14 or less carbon atoms, a branched alkyl group including 10 or less carbon atoms, an alkenyl group including 10 or less carbon atoms, a cycloalkyl group including 10 or less carbon atoms, or a functional group that is capable of binding to a hydroxyl group; n and m each denote 0 or an integer of from 1 through 10; and X? denotes a charge-neutralizing ion.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: April 28, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Goto, Toshiya Sagisaka, Satoshi Yamamoto, Masato Shinoda, Mamiko Inoue, Tohru Yashiro
  • Patent number: 10613253
    Abstract: A metasurface is capable of modulating input light including a wavelength in a range of 880 nm to 40 ?m. The metasurface includes: a GaAs substrate including a light input surface into which input light is input and a light output surface facing the light input surface; an interlayer having a lower refractive index than GaAs and disposed on the light output surface side of the GaAs substrate; and a plurality of V-shaped antenna elements disposed on a side of the interlayer which is opposite to the GaAs substrate side and including a first arm and a second arm continuous with one end of the first arm.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: April 7, 2020
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Yoshiro Nomoto, Yoshitaka Kurosaka, Kazuyoshi Hirose, Takahiro Sugiyama, Soh Uenoyama
  • Patent number: 10606091
    Abstract: To provide a naked-eye type stereoscopic display device which can achieve a fine stereoscopic display property while achieving high-definition display and high yield. Aperture parts of sub-pixels neighboring to a first direction include overlapping regions which overlap in a second direction and a non-overlapping region which does not overlap. Provided that a width of the aperture part in the second direction is defined as a longitudinal aperture width, the non-overlapping region includes an aperture width fluctuating region where the longitudinal aperture width changes continuously from roughly a center of the aperture part towards both ends of the first direction, respectively. The sum of the longitudinal aperture widths of the two overlapping regions overlapping with each other at a same position in the first direction is larger than the longitudinal aperture width in roughly the center of the aperture part.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: March 31, 2020
    Assignee: TIANMA MICROELECTRONICS CO., LTD.
    Inventors: Takuya Asai, Koji Shigemura
  • Patent number: 10591824
    Abstract: According to one embodiment, an illumination optical apparatus comprises: a light splitting device which splits the beam into a plurality of beams with respective polarization states different from each other; a spatial light modulation device which is arranged on at least one of a first optical path in which a first beam out of the plurality of beams travels and a second optical path in which a second beam out of the plurality of beams travels, and which has a plurality of optical elements arranged two-dimensionally and driven individually; and a control device which controls the spatial modulation device to combine the first beam and the second beam at least in part.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: March 17, 2020
    Assignee: NIKON CORPORATION
    Inventor: Toru Fujii
  • Patent number: 10587345
    Abstract: An apparatus measures the transverse profile of vectorial optical field beams, including at least the directional intensity complex amplitude, the phase and the polarization spatial profile. The apparatus contains a polarization separation module, a weak perturbation module, and a detection module. Characterizing the transverse profile of vector fields provides an optical metrology tool for both fundamental studies of vectorial optical fields and a wide spectrum of applications, including microscopy, surveillance, imaging, communication, material processing, and laser trapping.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: March 10, 2020
    Assignee: University of South Florida
    Inventor: Zhimin Shi
  • Patent number: 10571630
    Abstract: An optical system includes a silicon (Si) substrate, a buried oxide (BOX) layer formed on the substrate, a silicon nitride (SiN) layer formed above the BOX layer, and a SiN waveguide formed in the SiN layer. In some embodiments, the optical system may additionally include an interposer waveguide adiabatically coupled to the SiN waveguide to form a SiN-interposer adiabatic coupler that includes at least the tapered section of the SiN waveguide, the optical system further including at least one of: a cavity formed in the Si substrate at least beneath the SiN-interposer adiabatic coupler or an oxide overlay formed between a top of a SiN core of the SiN waveguide and a bottom of the interposer waveguide. Alternatively or additionally, the optical system may additionally include a multimode Si—SiN adiabatic coupler that includes a SiN taper of a SiN waveguide and a Si taper of a Si waveguide.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: February 25, 2020
    Assignee: Finisar Corporation
    Inventors: Daniel Mahgerefteh, Bryan Park
  • Patent number: 10571108
    Abstract: An apparatus and a method for cooling a digital micromirror device are disclosed. For example, the apparatus includes a digital micromirror device (DMD), a housing coupled to the DMD, wherein a first side of the housing is coupled to a bottom of the DMD and a cooling block coupled to a second side of the housing that is opposite the first side. The cooling block includes a plate that includes a plurality of openings, a diaphragm coupled to the plate, an air inlet to generate an airflow across the plate, wherein the diaphragm creates a force to move the airflow in a direction that is perpendicular to a direction of the airflow towards the second side of the housing, and an air outlet to collect the airflow.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: February 25, 2020
    Assignee: Xerox Corporation
    Inventor: Francisco Zirilli
  • Patent number: 10571794
    Abstract: A video is superimposed on an object in order that the object will be perceived as if the object were given a motion. This video is a video including a luminance motion component corresponding to a motion given to the object.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: February 25, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takahiro Kawabe, Shinya Nishida, Kazushi Maruya, Masataka Sawayama
  • Patent number: 10564509
    Abstract: A Mach-Zehnder modulator includes: a first semiconductor arm including a lower semiconductor region, an upper semiconductor layer, and a core layer disposed between the lower semiconductor region and the upper semiconductor layer; a second semiconductor arm including a lower semiconductor region, an upper semiconductor layer, and a core layer disposed between the lower semiconductor region and the upper semiconductor layer; a conductive semiconductor region connecting the lower semiconductor regions of the first and second semiconductor arms with each other; and a differential transmission line including a first signal transmitting conductor, a second signal transmitting conductor, and a reference potential conductor. The first and second signal transmitting conductors are coupled to the first and second semiconductor arms, respectively.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: February 18, 2020
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Naoya Kono
  • Patent number: 10558027
    Abstract: The invention relates to a method for concentrating light by coupling light into a thin film waveguide (2, 4) arranged on a substrate (1), in particular via at least one of its parallel surfaces, the method further comprising the step of exciting in the thin-film-waveguide (2, 4) at least one lateral guided mode (5) having at least one node (6), preferably exactly one node (6), by interaction, in particular scattering, diffraction or surface plasmon excitation of the incident light with a nanopatterned discontinuous excitation layer (3) of material, in particular metal, preferably silver, the nanopatterned discontinuous excitation layer (3) being arranged in the thin-film-waveguide (2,4) at the position of the at least one node (6) of the guided lateral mode (5).
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: February 11, 2020
    Assignee: BERGISCHE UNIVERSITAET WUPPERTAL
    Inventor: Patrick Goerrn
  • Patent number: 10559940
    Abstract: The present invention discloses a laser power control system includes a laser diode, a monitor photodiode, a bias control circuit, a modulation control circuit, a digital controller, and a laser diode driver. The laser power control system forms an automatic extinction ratio control loop that is configured to control the extinction ratio of the laser diode by comparing a monitor current with a first target current to keep the extinction ratio of the laser diode at the predetermined first target current. The laser power control system forms an automatic power control loop that is configured to control the average power of the laser diode by comparing the monitor current with the second target current to keep the average power of the laser diode at the predetermined second target current.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: February 11, 2020
    Assignee: Rafael Microelectronics, Inc.
    Inventors: Meng-Ping Kan, Kuan-Hsun Wang
  • Patent number: 10551731
    Abstract: An extreme ultraviolet mask and method of manufacture thereof includes: providing a glass-ceramic block; forming a glass-ceramic substrate from the glass-ceramic block; and depositing a planarization layer on the glass-ceramic substrate.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: February 4, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Ralf Hofmann, Majeed Foad, Cara Beasley
  • Patent number: 10551620
    Abstract: A heads up display system of a vehicle includes a combiner screen having a first substantially transparent substrate defining a first surface and a second surface, a second substantially transparent substrate defining a third surface and a fourth surface. A primary seal is disposed between the first and second substrates. The seal and the first and second substrates define a cavity therebetween. An electro-optic material is positioned within the cavity and a transflective layer having a multilayer polymeric film positioned on one of the first and second surfaces, and a projector for projecting light having a first polarization toward the first surface of the first substrate.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: February 4, 2020
    Assignee: GENTEX CORPORATION
    Inventors: David J. Cammenga, William L. Tonar, David L. Poll
  • Patent number: 10544032
    Abstract: A MEMS device includes a plurality of ribbon elements, a securing portion, and a plurality of connecting portions. The securing portion supports the plurality of ribbon elements. The plurality of connecting portions are disposed on ends of each of the plurality of ribbon elements and connect each of the plurality of ribbon elements to the securing portion. An angle formed by a longitudinal extending line of each of the plurality of ribbon elements and each of the plurality of connecting portions is greater than 0° in a planar direction of each of the plurality of ribbon elements.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: January 28, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Fujishima, Hidetaka Noguchi, Hidenori Kato, Junichi Azumi, Masashi Suematsu, Shuichi Suzuki
  • Patent number: 10520758
    Abstract: An optical modulating device includes a permittivity change layer having a variable permittivity, a dielectric layer disposed on the permittivity change layer, a nanoantenna disposed on the dielectric layer, and a light-emitting structure disposed adjacent to the permittivity change layer.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: December 31, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Seunghoon Han, Ruzan Sokhoyan, Harry Atwater, Ghazaleh Kafaie, Ragip Pala, Yu-Jung Lu, Ho Wai Lee, Yao-Wei Huang, Krishnan Thyagarajan
  • Patent number: 10509226
    Abstract: A heads up display system of a vehicle includes a combiner screen having a first substantially transparent substrate defining a first surface and a second surface, a second substantially transparent substrate defining a third surface and a fourth surface. A primary seal is disposed between the first and second substrates. The seal and the first and second substrates define a cavity therebetween. An electro-optic material is positioned within the cavity and a transflective layer having a multilayer polymeric film positioned on one of the first and second surfaces, and a projector for projecting light having a first polarization toward the first surface of the first substrate.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: December 17, 2019
    Assignee: GENTEX CORPORATION
    Inventors: David J. Cammenga, William L. Tonar, David L. Poll
  • Patent number: 10481476
    Abstract: An image processing apparatus is provided for generating data used to form on a recording medium an uneven layer on which a plurality of unit areas each having a projection are arranged, including: a first obtaining unit that obtains first brightness information regarding a brightness of a predetermined area of an object observed in a first viewing direction and a brightness of the predetermined area of the object observed in a second viewing direction having an elevation angle different from that of the first viewing direction; and a first generation unit that generates first recording amount data that indicates a recording amount of recording material used to form the uneven layer on the recording medium, the uneven layer being formed such that at least one of a width of each of the unit areas and a height of the projection changes, on a basis of the first brightness information.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: November 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hideki Kubo
  • Patent number: 10481461
    Abstract: Provided is a reversible electrochemical mirror including a first substrate and a second substrate, which face each other, a first transparent electrode disposed on the first substrate and facing the second substrate, a second transparent electrode disposed on the second substrate and facing the first transparent electrode, an electrolyte solution interposed between the first transparent electrode and the second transparent electrode, and a counter electrode material layer disposed on the second transparent electrode and contacting the electrolyte solution.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: November 19, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seong-Mok Cho, Sujung Kim, Tae-Youb Kim, Juhee Song, Chil Seong Ah, Yong Hae Kim, Joo Yeon Kim, Hojun Ryu, Jeong Ik Lee, Sang Hoon Cheon, Chi-Sun Hwang
  • Patent number: 10459259
    Abstract: Methods and systems for electro-absorption modulator drivers in CMOS may comprise an electro-absorption modulator optically coupled to a laser source and electrically coupled to a modulator driver circuit that is in a complementary metal oxide semiconductor (CMOS) chip. The electro-absorption modulator includes a summer for receiving a negative bias voltage and a programmable offset voltage, a voltage regulator for receiving the output of the summer and generating a negative DC voltage of lower magnitude than the negative bias voltage, level shifting circuitry for shifting a received data signal to a DC voltage level between the negative DC voltage from the voltage regulator and the negative bias voltage, and an electrical coupling structure for DC-coupling the level shifted data signal to the modulator. The bias voltage may be received from an off-chip low drop out (LDO) voltage regulator. The level shifting circuitry may include cascode CMOS transistors and a current mirror.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: October 29, 2019
    Assignee: Maxlinear, Inc.
    Inventor: Jurgen Hissen