Specific Light Modulator Patents (Class 347/239)
  • Patent number: 11381054
    Abstract: The invention relates to a method for stably transmitting laser radiation through an optical waveguide (3), wherein two or more modes of the laser radiation propagating in the optical waveguide (3) interfere and form a mode interference pattern in the optical waveguide, as a result of which a thermally induced refractive index grating is produced in the optical waveguide (3). It is an object of the invention to demonstrate an effective approach for stabilizing the output signal of the optical waveguide (3) in a fiber-based laser/amplifier combination at high output powers, i.e. for avoiding mode instability. The invention achieves this object by virtue of the fact that a relative spatial phase shift between the mode interference pattern and the thermally induced refractive index grating is set in the direction of propagation of the laser radiation.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: July 5, 2022
    Assignees: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Friedrich-Schiller-Universität Jena
    Inventors: Christoph Stihler, César Jáuregui Misas, Jens Limpert, Andreas Tünnermann
  • Patent number: 10908569
    Abstract: This technology includes identifying current items of motorized transport inventory having one or more current features from received motorized transport inventory data. Each match of one or more mapped features of any mapped master pieces of media content with the current features of any of the current items of motorized transport inventory is determined. At least one of the master pieces of media content is mapped to two or more of the current items of motorized transport inventory. Any missing pieces of media content of the one or more current features of any of the current items of motorized transport inventory are identified based on the one or more determined matched master pieces of media content. One or more of the identified missing pieces of media content of any of the current items of motorized transport inventory is obtained.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: February 2, 2021
    Assignee: TRU IMAGES, INC.
    Inventors: Frank DiGiorgio, Mark Agor, Dennis Wheeler
  • Patent number: 10843956
    Abstract: Disclosed herein are transparent articles and methods and systems for processing transparent articles. Systems for processing transparent articles, e.g. cutting glass, may include at least one initial laser and at least one polarizing beam splitter, where the polarizing beam splitter is configured to split an initial laser beam into a plurality of laser beams, and wherein the plurality of laser beams are useful for processing transparent articles. Methods for processing transparent articles comprise creating at least one flaw in the transparent articles with a plurality of laser beams.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: November 24, 2020
    Assignee: Corning Incorporated
    Inventors: Anping Liu, Leonard Thomas Masters, Alexander Mikhailovich Streltsov
  • Patent number: 10663924
    Abstract: A display device and a method for realizing holographic display by the same are disclosed. The first lens array includes a plurality of first lenses arranged in an array, and the first lenses correspond to a plurality of viewing areas disposed on the light emitting path respectively; the array of slits includes a plurality of slits which are arranged in an array and disposed in one-to-one correspondence with the first lenses; the spatial light modulator loads a holographic image; the eye-tracking device tracks the location of human eye; and after determining a viewing area according to the location of human eye, the controller controls the deflecting member to emit light emitted from the spatial light modulator to the slit corresponding to the first lens which corresponds to the viewing area, and controls a deflection angle of the first lens.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: May 26, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Yuxin Zhang
  • Patent number: 10473929
    Abstract: A head-up display includes a display device and a projection optical system. The projection optical system has a lens group including at least one lens element and projects onto a reflecting member an image displayed on the display device. The lens group includes a drive lens that shifts along an optical path to change its distance from the display device.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: November 12, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Satoshi Kuzuhara, Hiroaki Okayama, Toshiya Mori
  • Patent number: 10394043
    Abstract: Disclosed is a method of adjusting a plurality of optical elements associated with a printing system ROS. According to one exemplary embodiment, sensitivity analysis is performed on a computer model of the ROS system and an optical element alignment sequence is generated to minimize the number of optical element adjustments needed to achieve a predefined ROS performance.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: August 27, 2019
    Assignee: Xerox Corporation
    Inventors: Alice Chien, Robert Paul Herloski
  • Patent number: 10324427
    Abstract: This technology includes identifying current items of motorized transport inventory having one or more current features from received motorized transport inventory data. Each match of one or more mapped features of any mapped master pieces of media content with the current features of any of the current items of motorized transport inventory is determined. At least one of the master pieces of media content is mapped to two or more of the current items of motorized transport inventory. Any missing pieces of media content of the one or more current features of any of the current items of motorized transport inventory are identified based on the one or more determined matched master pieces of media content. One or more of the identified missing pieces of media content of any of the current items of motorized transport inventory is obtained.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: June 18, 2019
    Assignee: Ability Advantage
    Inventors: Frank DiGiorgio, Mark Agor, Dennis Wheeler
  • Patent number: 10156793
    Abstract: An image exposure system of a 3D printing device having a spatial light modulator, a light source, a projection lens, a micro-displacement driving mechanism and a controller. The spatial light modulator is provided with a plurality of micromirrors for adjusting the reflective direction of light illuminating the micromirrors according to a control signal; the light source generates a light beam illuminating the spatial light modulator; the projection lens is aligned with a first direction of the spatial light modulator so that a micro light spot array formed through the micromirror by the light source projected onto the surface of a light-sensitive material; the micro-displacement driving mechanism is connected with the spatial light modulator, and can drive the spatial light modulator to move in third and fourth directions that are perpendicular to each other, in order to finely adjust the position on the surface of the light-sensitive material onto which the micro light spot array is projected.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: December 18, 2018
    Assignee: PRISMLAB CHINA LTD.
    Inventor: Feng Hou
  • Patent number: 9921692
    Abstract: An input device for use with an electronic system includes a deflectable component having an input surface configured to be touched by input objects and a capacitive sensor layer configured to sense positional information of the input objects. A hinge pivotably mounts a first edge of the deflectable component to the electronic system and facilitates deflection of the deflectable component in response to force applied by an input object to the input surface. A spring mechanism is spaced apart from the hinge and configured to resiliently couple a second edge of the deflectable component to the electronic system and to provide a restoring force responsive to the applied force.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: March 20, 2018
    Assignee: Synaptics Incorporated
    Inventors: Yeh-Cheng Tan, Su-Chuan Chiu
  • Patent number: 9772504
    Abstract: To provide an illumination device and a projection type image display device that illuminate an area to be illuminated (image formation area) under conditions where speckle noise is less noticeable. An illumination device according to the present invention includes: a light source 11 that emits coherent light; an optical scanning section 15 that scans the coherent light emitted from the light source 11; and an optical path conversion system 21 configured to allow the coherent light scanned by the optical scanning section 15 to illuminate an area to be illuminated sequentially in an overlapping manner. An incident angle of the coherent light that enters respective points of the area to be illuminated changes with time.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: September 26, 2017
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Yukio Taniguchi, Makio Kurashige, Yasuyuki Ooyagi
  • Patent number: 9752748
    Abstract: An illumination device comprising a plurality of light sources emitting, an optical gate; a light collector, an optical gate, and an optical projecting system adapted to image the optical gate at a distance along the optical axis. The light collector is adapted to collect light from a plurality of light sources and where the light collector comprises a plurality of lenslets collecting light from the light sources and convert the light into a plurality of light beams propagating along an optical axis. The lenslets are arranged in a dense pattern. A plurality of outermost adjacent lenslets is located along an outer circular boundary having the same radial distance to a center of the light collector. The dense pattern has been obtained by optimizing a packaging density defined by a ratio of a sum of areas of circular cross sections of the lenslets and an area of the outer circular boundary.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: September 5, 2017
    Assignee: Martin Professional APS
    Inventor: Dennis Joergensen
  • Patent number: 9753296
    Abstract: In an illumination system (12, 13) for a scatterometer, first and second spatial light modulators lie in a common plane and are formed by different portions of a single liquid crystal cell (260). Pre-polarizers (250) apply polarization to first and second radiation prior to the spatial light modulators. A first spatial light modulator (236-S) varies a polarization state of the first radiation in accordance with a first programmable pattern. Second spatial light modulator (236-P) varies a polarization state of the second radiation accordance with a second programmable pattern. A polarizing beam splitter (234) selectively transmits each of the spatially modulated first and second radiation to a common output path, depending on the polarization state of the radiation. In an embodiment, functions of pre-polarizers are performed by the polarizing beam splitter.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: September 5, 2017
    Assignee: ASML Netherlands B.V.
    Inventors: Gerbrand Van Der Zouw, Martin Jacobus Johan Jak, Martin Ebert
  • Patent number: 9672452
    Abstract: An image forming apparatus which can reduce the required number of line buffers and random number generation circuits when performing a magnification changing process in a band process. The CPU 51 determines a range of a random number value (random number value rnd) which is generated by a random number generator, based on the scanning width (band process width d) and the length in a sub-scanning direction of an area (sub-scanning length ay). The CPU 51 receives a random number (random number value rnd), which is in the above range, and performs image processing in which a pixel is inserted or deleted at the position determined by the received random number (random number value rnd).
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: June 6, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuzuru Yano
  • Patent number: 9630424
    Abstract: A single-pass imaging system utilizes a two-dimensional (2D) light field generator (e.g., one or more VCSEL devices) to generate a modulated two-dimensional modulated light field in accordance with image data for a single row of pixels, and an anamorphic optical system that concentrates the two-dimensional modulated light field in a process direction such that a one-dimensional scan line image extending in a cross-process direction is generated on an imaging surface. The VCSEL array is configured using a scan line image data group made up of pixel image data portions, with associated groups of light emitting elements aligned in the process direction being configured by each pixel image data portion. Gray scaling is achieved either by turning on some of the light emitting elements of the associated group, or by turning the light emitting elements of the associated group partially on, e.g. using a common drive current.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: April 25, 2017
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Timothy David Stowe, David K. Biegelsen, Patrick Y. Maeda, Christopher L. Chua
  • Patent number: 9533370
    Abstract: A method for laser marking an anodized metal surface (5) with a desired color, which method comprises: providing a laser (1) for emitting a laser beam (4) comprising laser pulses having a pulse energy, a pulse width, and a pulse repetition frequency; providing a scanner (2) comprising a first mirror (6) for scanning the laser beam in a first direction (8), and a second mirror (7) for scanning the laser beam in a second direction (9); providing a lens (3) for focussing the laser beam from the laser (2) onto the anodized metal surface (5) to form a spot (31) having a spot diameter and a pulse fluence; providing a controller (11) for controlling the scanner (2) with a control signal (12); marking a plurality of lines (15) separated by a hatch distance (19) on the anodized metal surface to form a desired mark (16) by scanning the scanner (2) while pulsing the laser (1); selecting a scan speed (16), the pulse repetition frequency, and the spot diameter such that the separation (18) between consecutive spots (31) d
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: January 3, 2017
    Assignee: SPI Lasers UK Limited
    Inventors: Horia Sorin Andrei, Paul Martin Harrison
  • Patent number: 9529276
    Abstract: A microlithography projection exposure apparatus for producing microelectronic components has at least two operating states. The microlithography projection exposure apparatus includes a reflective mask in an object plane. In the first operating state, a first partial region of the mask is illuminated by a first radiation, which has an assigned first centroid direction having a first centroid direction vector at each point of the first partial region. In the second operating state, a second partial region of the mask is illuminated by a second radiation, which has an assigned second centroid direction having a second centroid direction vector at each point of the second partial region. The first and the second partial region have a common overlap region.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: December 27, 2016
    Assignee: Carl Zeiss SMT GmbH
    Inventors: Hans-Juergen Mann, Winfried Kaiser
  • Patent number: 9523873
    Abstract: A direct imaging system comprises an illumination unit comprising a plurality of light sources, the plurality of light sources configured to emit a plurality of beams, an optical system for forming the plurality of beams to be aligned in position or angle, an acoustic optical modulator positioned to receive the plurality of beams aligned in one of position or angle and to consecutively diffract different portions of the plurality of beams as an acoustic wave propagates in an acoustic direction, and a scanning element adapted to scan an exposure plane with the plurality of beams modulated by the acoustic optical modulator at a scanning velocity, wherein the scanning velocity is selected to incoherently unite the different portions of the plurality of beams into a single exposure spot.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: December 20, 2016
    Assignees: Orbotech Ltd., Laser Imaging Systems GmbH & Co. KG
    Inventors: Stefan Heinemann, Wolfgang Retschke, Holger Wagner, Jonas Burghoff, Abraham Gross
  • Patent number: 9505606
    Abstract: A MEMS (micro electro mechanical system) actuator with discretely controlled multiple motions comprises bottom layer, stepper plate, support, and motion plate. The multiple motion of the motion plate is generated by the electrostatically actuated stepper plates and geometrically predetermined supports. By introducing the MEMS actuator with discretely controlled multiple motions, simple motion control can be achieved by digital controlling and only single voltage is needed for motion control of the motion plate.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: November 29, 2016
    Assignees: Angstrom, Inc., Stereo Display, Inc.
    Inventors: Jin Young Sohn, Gyoung II Cho, Cheong Soo Seo
  • Patent number: 9488849
    Abstract: Provided are a coherent light source apparatus and a projector. A first light emission region is formed on basis of a coherent light source; a first optical system projects light derived from a first light emission region to form a second light emission region; a light deflection section deflects a bundle of rays in vicinity of the second light emission region; a second optical system downstream of the light deflection section; and a light mixing section downstream of the second optical system that mixes components of angles and positions of rays incident on an incident end. The second optical system forms an image conjugate to the first light emission region and a third light emission region substantially conjugate to an exit pupil of the first optical system. The light deflection section continues to cause a direction in which the bundle of rays is deflected to be continuously changed.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: November 8, 2016
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventors: Mikio Shimizu, Masashi Okamoto, Yuichi Miura, Takahiro Toma
  • Patent number: 9482877
    Abstract: The present invention provides a light source for a projector system, and method of operating the light source as well as a projector system that provides: i. a substantially uniform brightness across the surface of an image modulator, and ii. at each point of the surface of the image modulator a more uniform filling of the available angular space. Embodiments of the present invention use a laser light source for use with an image modulator, the light source emitting light with multiple wavelengths for at least one primary color and a light integrator system that for each of the wavelengths is adapted to provide: i. a substantially uniform brightness across the surface of the image modulator, and ii. at each point of the surface of the image modulator a more uniform filling of the available angular space.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: November 1, 2016
    Assignee: Barco N.V.
    Inventor: Peter Janssens
  • Patent number: 9354379
    Abstract: A laser line generator system that utilizes a light guide element to convert high energy coherent light generated by a high fill-factor laser diode bar into homogenous light, and utilizes one or more slow-axis relay lenses to image the homogenous light such that it forms a homogenous line illumination pattern on an illumination plane. The light guide utilizes parallel or down-tapered side walls to mix received coherent light in the slow-axis direction by way of total internal reflection. A Keplerian telescope including two cylinder lenses is optionally used in place of the slow-axis relay lens. Optional fast-axis lenses are used to assist in focusing the homogenous light at the illumination plane. The laser light generator forms, e.g., a single-pass imaging system for a scanning/printing apparatus in which the homogenous line illumination pattern is directed onto a linearly arranged series of spatial light modulators, such as Digital Micromirror Devices (DMDs).
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: May 31, 2016
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Patrick Y. Maeda, Timothy David Stowe
  • Patent number: 9346301
    Abstract: A method for controlling a digital printing system to print digital image data for an image region onto a continuous web of print media. An image region database stores data characterizing a plurality of reference image regions, each reference image region having one or more associated system control parameters that are appropriate for use in printing the reference image region. The system control parameters can include parameters related to correcting color registration errors. The image region to be printed is compared with the reference image regions in the image region database, and a similar reference image region is selected. The image region is printed using the system control parameters associated with the selected similar reference image region.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: May 24, 2016
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Cumar Sreekumar, James A. Katerberg
  • Patent number: 9304401
    Abstract: A radiation spot measurement system for a lithographic apparatus, the system having a target onto which a radiation system of the lithographic apparatus may project spots of radiation for a measurement process, the target having a measurement target. The system further includes a radiation detector to detect radiation from one of the spots, and a controller to receive information from the radiation detector and to determine the position of the spot of radiation relative to an intended position of the spot of radiation.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: April 5, 2016
    Assignee: ASML NETHERLANDS B.V.
    Inventors: Felix Godfried Peter Peeters, Jozef Petrus Henricus Benschop, Michael Jozef Mathijs Renkens, Gregor Edward Van Baars, Jeroen Dekkers
  • Patent number: 9285579
    Abstract: A light modulating device (101A) comprises a reflective SLM (107) for modulating a laser beam (Lr) entering along a first optical path extending in a first direction; a dielectric multilayer film mirror (106), formed on a light transmitting member (105) transparent to illumination light (Li), for reflecting the laser beam (Lr) incident on a front face thereof from the reflective SLM (107) onto a second optical path extending in a second direction intersecting the first direction, and transmitting the illumination light (Li) incident on a rear face thereof onto the second optical path; and a light collecting lens (109) for receiving the illumination light (Li) and laser beam (Lr) from the dielectric multilayer film mirror (106) and converging the illumination light (Li) and laser beam (Lr).
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: March 15, 2016
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Haruyasu Ito, Takashi Inoue, Naoya Matsumoto
  • Patent number: 9030515
    Abstract: Substantially one-dimensional scan line images at 1200 dpi or greater are generated in response to predetermined scan line image data. A substantially uniform two-dimensional homogenous light field is modulated using a spatial light modulator in accordance with the predetermined scan line image data such that the modulated light forms a two-dimensional modulated light field. The modulated light field is then anamorphically imaged and concentrated to form the substantially one-dimensional scan line image. The spatial light modulator includes light modulating elements arranged in a two-dimensional array.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: May 12, 2015
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Timothy David Stowe, Douglas N. Curry, Patrick Y. Maeda
  • Patent number: 8963971
    Abstract: Provided are a high-resolution laser exposure method and a product manufactured with use of the laser exposure method, the laser exposure method being capable of performing high-resolution laser plate-making in gravure plate-making, offset plate-making, flexo plate-making, and the like, and being usable in laser exposure of a circuit pattern in an electronic component such as a printed circuit board, a liquid crystal display, and a plasma display, or in special printing for prevention of forgery of banknotes and the like. The laser exposure method, which uses a laser exposure apparatus, includes: scanning laser beams to form a laser spot array having a predetermined length on a photosensitive film; and exposing the photosensitive film coated on a plate surface to light, to thereby form a photosensitized part and a non-photosensitized part.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: February 24, 2015
    Assignee: Think Laboratory Co., Ltd
    Inventors: Tatsuo Shigeta, Hitoshi Horiuchi
  • Patent number: 8861066
    Abstract: The present invention relates to a reconfigurable micro-mechanical light modulator including a two-dimensional array of modulating elements with redundant rows of modulating elements. In particular, it relates to extending the life of the modulator by shifting the set of elements used, without physically replacing the micro-mechanical light modulator. The modulating elements are adapted to modulate light impinging on the micro-mechanical light modulator. The array of modulating elements comprises a first and a second set of modulating elements. The second set is a redundant set of modulating elements that can be selected to substitute for the first set of modulating elements in modulating light impinging on the micro-mechanical light modulator, without physically replacing the micro-mechanical light modulator. Devices and methods are described.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: October 14, 2014
    Assignee: Micronic AB
    Inventors: Per Askebjer, Torbjörn Sandström
  • Patent number: 8791973
    Abstract: There is provided an image forming apparatus including plural photosensitive members on which developer images are formed by supplying developer to electrostatic latent images, respectively, an exposure device which illuminates light beams onto surfaces of the photosensitive members to form the electrostatic latent images, respectively. The developer images on the respective photosensitive numbers are transferred to a transferred medium which is moved in a moving direction while contacting the respective photosensitive members. The exposure device is configured such that a beam diameter of light beam exposing a most-upstream photosensitive member in the moving direction on a surface of the most-upstream photosensitive member is larger than a beam diameter of light beam exposing a most-downstream photosensitive member in the moving direction on a surface of the most-downstream photosensitive member.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: July 29, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Yuichi Matsushita, Toshio Furukawa, Yosuke Sugiyama, Minoru Matsuura
  • Patent number: 8680489
    Abstract: An installation and method for etching at least one wafer coated with an etch-ready, blank photosensitive layer is disclosed. In accordance with an embodiment, the wafer has thickness irregularities, wherein the wafer is arranged to be able to be submitted to irradiation-beam scanning, a sheet transparent to the radiation to which the photosensitive layer is sensitive covers the wafer, and a probe beam intended to reflect on the upper portion of the sheet perpendicularly to the irradiation beam spot on the photosensitive layer is provided.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: March 25, 2014
    Assignee: Commissariat à L'Énergie Atomique et aux Énergies Alternatives
    Inventors: Christophe Martinez, Pascal Boulitreau, Fabien Laulagnet
  • Patent number: 8654167
    Abstract: An electrooptic device having a simple structure that can efficiently increase deflection of a beam is provided. The device includes: an electrooptic crystal (11) having an electrooptic effect; an electrode pair of a positive electrode (12) and a negative electrode (13) for generating an electric field inside the electrooptic crystal; and a power source for applying a voltage between the electrode pair so as to generate a space charge inside the electrooptic crystal. With this arrangement, by using a simple structure, a change in a deflection angle is temporally rapid, and a large deflection angle that cannot be obtained by a conventional electrooptic crystal prism can be acquired at a low applied voltage.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: February 18, 2014
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kouichirou Nakamura, Kazuo Fujiura, Tadayuki Imai, Jun Miyazu
  • Patent number: 8648893
    Abstract: An electrooptic device having a simple structure that can efficiently increase deflection of a beam is provided. The device includes: an electrooptic crystal (11) having an electrooptic effect; an electrode pair of a positive electrode (12) and a negative electrode (13) for generating an electric field inside the electrooptic crystal; and a power source for applying a voltage between the electrode pair so as to generate a space charge inside the electrooptic crystal. With this arrangement, by using a simple structure, a change in a deflection angle is temporally rapid, and a large deflection angle that cannot be obtained by a conventional electrooptic crystal prism can be acquired at a low applied voltage.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: February 11, 2014
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kouichirou Nakamura, Kazuo Fujiura, Tadayuki Imai, Jun Miyazu
  • Patent number: 8610971
    Abstract: An image forming apparatus that forms an image includes: a photosensitive element; an optical scanning device that includes a light source, and scans a surface of the photosensitive element in a main scanning direction with light emitted from the light source to form a latent image; a developing unit that develops the latent image; a photosensitive element period detecting sensor that detects a rotation period of the photosensitive element; a density sensor that detects a density variation of an image developed by the developing unit, in a sub scanning direction; and a processing device that corrects a driving signal of the light source according to the image information, based on an output signal of the density sensor and an output signal of the photosensitive element period detecting sensor.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: December 17, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Atsufumi Omori, Masaaki Ishida, Yasuhiro Nihei, Muneaki Iwata
  • Patent number: 8537185
    Abstract: A laser induced thermal imaging apparatus and a fabricating method of organic light emitting diodes using the same, which laminate an acceptor substrate and a donor film using a magnetic force in vacuum, and are used to form a pixel array on the acceptor substrate. A substrate stage includes a magnet or magnetic substance. The acceptor substrate has a pixel region for forming first, second, and third sub-pixels, and the donor film has an organic light emission layer to be transferred to the pixel region. A laser oscillator irradiates a laser to the donor film. A contact frame is adapted to be disposed between the substrate stage and the laser oscillator, and is used to form a magnetic force with the substrate stage. The contact frame includes an opening through which the laser passes. A contact frame feed mechanism moves the contact frame in a direction of the substrate stage.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: September 17, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sok Won Noh, Seong Taek Lee, Mu Hyun Kim, Myung Won Song, Sun Hoe Kim, Jin Wook Seong
  • Patent number: 8502853
    Abstract: A method for generating an elongated concentrated scan image on an imaging surface of a scan structure (e.g., a drum cylinder) in an imaging (e.g., xerographic or lithographic) apparatus, wherein the imaging surface is caused to move in a cross-scan (process) direction. A spatial light modulator having a two-dimensional array of light modulating elements is used to modulate a two-dimensional light field in response to predetermined scan image data, and then the modulated light is anamorphically imaged and concentrated onto an elongated imaging region defined on the imaging surface. To avoid smearing, movement of the imaging surface is synchronized with the modulated states of the light modulating elements such that image features of the scan image are scrolled (moved in the cross-scan direction) at the same rate as the cross-scan movement of the imaging surface, whereby the features remain coincident with the same portion of the imaging surface.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: August 6, 2013
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Douglas N. Curry, Timothy David Stowe, Patrick Y. Maeda
  • Patent number: 8451353
    Abstract: Single-chip, multiple-linear-array MEMS form the basis for high-resolution, high-frame-rate video displays.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: May 28, 2013
    Assignee: Alces Technology, Inc.
    Inventors: David M Bloom, Matthew A Leone
  • Patent number: 8436885
    Abstract: A light from a laser light source (11) is collected at a position of a slit (125a) in a vertical direction by a first optical system (12a) to form an intermediate image which is long in a horizontal direction corresponding to an arrangement direction of light modulator elements. An undesired light such as side lobes which appear on the both sides of the intermediate image in the vertical direction is blocked by a slit (125a) and the intermediate image is reformed by a second optical system (12b), to direct a liner illumination light onto the spatial light modulator (13). Thus, in a state where moving ribbons are sagged and first order diffracted lights are emitted in a light modulator element, it is possible to prevent a zeroth order light from being emitted from both end portions of ribbons, to thereby enhance contrast of the signal light.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: May 7, 2013
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventors: Yoshimi Hashimoto, Yoshikazu Kataoka
  • Patent number: 8379313
    Abstract: An image scanning apparatus includes a beam splitter disposed between a deflection surface and surfaces to be scanned. The beam splitter is formed of reflective surfaces and transmissive surfaces. One transmissive surface is disposed between the reflective surfaces in the sub-scanning direction, and an optical path of light beams reaching surfaces to be scanned that are physically closer to the deflection surface than a surface to be scanned located at the position physically farthest from the deflection surface between the reflective surfaces intersects with an optical path of a light beam reaching the surface to be scanned located at a position physically farthest from the deflection surface between the deflection surface and the transmissive surface in a sub-scanning cross section in the beam splitter.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: February 19, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hidekazu Shimomura
  • Patent number: 8326072
    Abstract: An image display apparatus, and an apparatuse for and a method of image processing are provided that can reduce in real time a quantization noise in an image signal received by the image display apparatus.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: December 4, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Jun Someya, Masako Asamura
  • Patent number: 8300075
    Abstract: A laser driving device in the embodiment includes: a laser light source that emits laser light; a light source drive control unit that adjusts a light amount of laser light emitted from the laser light source constant and controls on-off driving of the laser light source; a light amount adjustment element that is disposed in an optical path of laser light emitted from the laser light source and is capable of electrically changing transmittance or reflectance of the laser light that is entered thereinto; and a peak light amount control unit that controls the transmittance or the reflectance of the light amount adjustment element, so as to adjust a peak light amount of the laser light that is output from the light amount adjustment element after having traveled through or having been reflected by the light amount adjustment element.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: October 30, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Masaaki Ishida, Atsufumi Omori
  • Patent number: 8217978
    Abstract: An optical scanning apparatus, an image formation apparatus, and a phase modulation method are disclosed. The optical scanning apparatus includes a liquid crystal device for deflecting an optical beam irradiated by a semiconductor laser. The driving voltages for the liquid crystal device are controlled based on, e.g., the temperature of the liquid crystal device so that degradation of the diameter of a spot of the optical beam due to wavefront aberration is prevented.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: July 10, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Taku Amada, Tomohiro Nakajima, Akihisa Itabashi, Seizo Suzuki
  • Patent number: 8199178
    Abstract: A linear dense-packed spatial light modulator (LDSLM) and method of modulating light using the same are provided. In one embodiment, the LDSLM comprises a plurality of two dimensional (2D) modulators grouped proximal to one another on a surface of a substrate to form a densely-packed, linear array having a plurality of pixels along a longitudinal axis of the array. Each pixel includes a number of 2D modulators electrically coupled to receive a common drive signal and to modulate light reflected therefrom in response to the drive signal. Preferably, each pixel includes at least two 2D modulators grouped along a transverse axis of the array. More preferably, the number of 2D modulators along the transverse axis in each pixel is selected to provide a desired power density while avoiding an undesired thermal gradient across the LDSLM. The LDSLM and method are particularly useful in printing applications. Other embodiments are also disclosed.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: June 12, 2012
    Assignee: Silicon Light Machines Corporation
    Inventor: Alexander Payne
  • Patent number: 8120719
    Abstract: A photo-addressable display medium is provided, the photo-addressable display medium including: a pair of electrodes having transparency; a photoconductive layer disposed between the pair of electrodes and having a laminated structure of a first charge generation layer, a charge transport layer and a second charge generation layer in this order from an exposing light irradiation side; and a liquid crystal layer disposed between an electrode of the inverse side to the exposing light irradiation side and the second charge generation layer and having memory performance, wherein the first charge generation layer and the second charge generation layer contain a phthalocyanine compound, and the charge transport layer contains a stilbene compound represented by the following formula (1): wherein, R1 to R4 each independently represents a hydrogen atom, a methyl group or an ethyl group.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: February 21, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Mieko Seki, Hiroe Okuyama, Yasuhiro Yamaguchi, Tomozumi Uesaka, Hideo Kobayashi
  • Patent number: 8115794
    Abstract: In an optical scanning device, when pixel density is taken to be n, number of the light beams is taken to be b, and number of the deflection surfaces of a deflecting unit is taken to be p, a spatial frequency S denoted by S=1/(1/(25.4/n×b×p) is within a range of a spatial frequency characteristic for a visual perception system of a high relative luminous efficiency. When spacing between ends in a sub-scanning direction of a scanning line formed by one scan by the deflection unit is taken to be L1, and spacing between all progressive scanning lines at the surface to be scanned is taken to be L2, then L1>(k?1)×L2 is satisfied, where k is a total number of light emitting points of a light source.
    Type: Grant
    Filed: January 2, 2009
    Date of Patent: February 14, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Masako Yoshii, Seizo Suzuki, Yoshinori Hayashi, Daisuke Ichii
  • Publication number: 20120026272
    Abstract: A method of scanning a pattern on a surface, the method comprises forming a first spatially modulated light beam including a pattern for writing on a surface; splitting the first spatially modulated light beam into a plurality of sub-beams; altering a spatial relationship between the plurality of sub-beams, thereby forming a second spatially modulated light beam; and canning the surface with the second spatially modulated light beam.
    Type: Application
    Filed: April 22, 2010
    Publication date: February 2, 2012
    Applicant: ORBOTECH LTD.
    Inventors: Yigal Katzir, Elie Meimoun
  • Publication number: 20110199455
    Abstract: A printing engine, having an ink support adapted to support an amount of ink, a plurality of laser scanning units, each laser scanning unit including a laser adapted to emit a laser beam and a directing unit configured to direct the laser beam onto the ink support. The laser scanning unit is adapted to apply energy to the amount of ink at a laser beam spot position. The laser scanning units are adapted to simultaneously scan the ink support substantially in a main scanning direction with respective laser beam spot positions, the laser beam spot positions being remote from each other.
    Type: Application
    Filed: April 29, 2011
    Publication date: August 18, 2011
    Inventor: Theodorus A.G. HEEREN
  • Patent number: 7995086
    Abstract: An image forming apparatus includes a laser array in which n light emitting sources are arrayed, an image-input converting unit configured to create, for each of channels of the laser array, a recording pattern for executing PWC from input image data and extract recording patterns of an nth channel and a first channel of the next scanning of the laser array, an overlapping control unit configured to calculate the width of laser pulses in the same position in a main scanning direction as overlapping width, a data correcting unit configured to reduce laser pulse width by a reduction amount corresponding to the calculated overlapping width and correct the laser pulse width, and a laser driver configured to control the intensity of laser beams in the respective channels of the laser array according to the recording patterns after the correction.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: August 9, 2011
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventor: Nobuhiko Nakahara
  • Patent number: 7986334
    Abstract: An image forming apparatus includes a plurality of image carriers and an optical writing device including light sources that emit light beams of different wavelengths, a deflector that deflects the light beams emitted from the light sources and synthesized on an identical axis in a sub-scanning direction, a first beam separator, a second beam separator, a first imaging device, and a second imaging device. The first beam separator and the second beam separator are located between the first imaging device and the second imaging device and transmit or reflect the light beams according to travel directions or wavelengths thereof. One of the targets is scanned with the light beam transmitted through the second beam separator. Another target is scanned with the light beam reflected by the second and first beam separators. The first and second imaging devices narrow the beams in the main scanning direction and the sub-scanning direction, respectively.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: July 26, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazunori Bannai, Hideto Higaki, Daisuke Imaki, Noboru Kusunose, Yoshinobu Sakaue
  • Patent number: 7957055
    Abstract: The present invention relates to an apparatus for creating a pattern on a workpiece sensitive to radiation, such as a photomask a display panel or a microoptical device. The apparatus may include a source for emitting light flashes, a spatial modulator having modulating elements (pixels), adapted to being illuminated by the radiation, and a projection system creating an image of the modulator on the workpiece. It may further include an electronic data processing and delivery system receiving a digital description of the pattern to be written, converting the pattern to modulator signals, and feeding the signals to the modulator. An electronic control system may be provided to control a trigger signal to compensate for flash-to-flash time jitter in the light source.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: June 7, 2011
    Assignee: Micronic Mydata AB
    Inventor: Torbjorn Sandstrom
  • Patent number: 7905609
    Abstract: A projector including a projector body, which has a light modulating device that modulates light emitted from a light source according to input image information to thereby form an optical image and a projection optical device that projects the formed optical image in an enlarged manner; an image output device that outputs the image information to the projector body; a connection mechanism for connecting the projector body and the image output device with each other such that the projector body and the image output device can rotate relative to each other; a rotation operation detecting unit that detects a relative rotation operation of the projector body and the image output device; and a control unit that controls the projector body and the rotation operation detecting unit.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: March 15, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Mitsuhiko Igarashi, Morio Matsumoto, Kazumi Yamamoto
  • Publication number: 20110058010
    Abstract: An imaging head (404) for writing an image on a substrate (108) includes an array of emitters (104) comprised of groups of emitters (120, 116, 112); imaging lens (408) that focuses light from each group onto the substrate; and wherein light from each group is focused at a different depth relative to a surface of the substrate.
    Type: Application
    Filed: September 8, 2009
    Publication date: March 10, 2011
    Inventors: David Aviel, Ophir Eyal