The Modulator Being An Array Of Liquid Crystal Cells (epo) Patents (Class 348/E5.141)
  • Patent number: 10310317
    Abstract: A light modulation element unit includes a light modulation element having a light modulator configured to modulate incident light and a cover glass that covers a light incident surface of the light modulator, a light shielding member, disposed along a surface of the cover glass, which has an opening in which light going to the light modulator passes and a light shield configured to shield light that does not pass the opening, and a heat radiation member provided in a direction different from a direction of the cover glass with respect to the light modulation element. The light shielding member has an extension that extends to outside of the cover glass and faces the heat radiation member. A first gap between the extension and the heat radiation member is smaller than a second gap between the light shield and the surface of the cover glass.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: June 4, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koichi Yusa, Toshiyuki Noda
  • Patent number: 10267492
    Abstract: An illumination device for synthesizing light from an object at virtually infinite distance comprises a primary light source configured to emit a primary light, a concentrator positioned downstream the primary light source and configured to reduce the divergence of the primary light, an emitting surface positioned downstream the concentrator, and an absorber made of light-absorbing material positioned upstream the emitting surface and configured to absorb light rays which cross the emitting surface in an upstream direction and which, in the absence of the absorber would not be directed toward the primary light source, wherein the primary light source, the concentrator, the emitting surface and the absorber are configured so that they produces from the primary light an output light that exits the emitting surface with a luminance profile which is spatially uniform across the emitting surface, and has a narrow peak in the polar-angle distribution around an output-light direction.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: April 23, 2019
    Assignee: CoeLux S.r.l.
    Inventor: Paolo Di Trapani
  • Patent number: 10215890
    Abstract: A lens assembly has two opposing surfaces, each surface introducing field curvature in a direction opposite of the field curvature introduced by the opposing surface, and thus the field curvatures introduced by the two surfaces at least partially cancel each other out, resulting in a net field curvature that provides for a substantially flat image plane or for an image plane with a specified curvature. The lens assembly may be implemented as a lens with two opposing Fresnel surfaces so that the field curvature in one direction introduced by one of the Fresnel surfaces is at least partially canceled out by the field curvature in the opposite direction as introduced by an opposing Fresnel surface. Alternatively, the lens assembly may be implemented as a lens with a positive continuous aspheric surface facing the user's eye and an opposing Fresnel surface facing the display panel.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: February 26, 2019
    Assignee: GOOGLE LLC
    Inventors: John D. Perreault, Xinda Hu, Yi Qin, Serge Bierhuizen
  • Patent number: 10209607
    Abstract: Disclosed is a projector (1), comprising a projector body (10) with a lens (12), and a light reflection assembly (20) for adjusting a projecting direction of the lens (12). The light reflection assembly (20) comprises a reflective mirror (23), and the light reflection assembly (20) is provided to be rotatably connected with the projector body (10). During the rotation, a mirror face of the reflective mirror (23) always faces towards the lens (12), so that the reflective mirror (23) adjusts the angle of the projecting direction between the mirror face and the lens (12) with the rotation of the light reflection assembly (20), so as to adjust the projecting location of the lens (12) by means of the rotation of the reflective mirror (23), such that the projecting direction can be changed without moving the projector (1).
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: February 19, 2019
    Assignee: APPOTRONICS CORPORATION LIMITED
    Inventors: Xiliang Wu, Yongzhuang Chen, Yi Deng
  • Patent number: 10191363
    Abstract: Provided is a projection-type image display device which by means of a projection lens (2) magnifies and projects an optical image formed by a light source and an image display element, wherein an error indicator (5) for indicating anomalies in the device is disposed on the rear surface opposite the front surface of a device housing (1) to which the projection lens (2) is attached. The projection-type image display device further includes an AC voltage monitor unit (12) for monitoring voltage waveforms supplied form an external power source and retaining voltage waveform data during the latest prescribed period in a memory, and reads out the voltage waveform data from the external power source retained in the memory and displays the voltage waveform data on the error indicator (5) as said anomalies.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: January 29, 2019
    Assignee: MAXELL, LTD.
    Inventors: Koji Hirata, Miyuki Ikeda, Tatsuya Ishikawa, Hiroyuki Shinji
  • Patent number: 10162174
    Abstract: A display apparatus comprises a display device including an imagewise light emitting unit that emits imagewise light for displaying an input image, and a display surface member that includes a display surface that displays the input image as a displayed image, and transmits backside ambient light or reflects ambient light; an observation distance detecting section that detects an observation distance between the display surface and an observer; a display brightness acquiring section that acquires display brightness of the display device; an ambient light detecting section that detects the ambient light; and an image processing unit that performs image processing to adjust input spatial frequency characteristics of the input image based on the display brightness, the observation distance, and the ambient light such that display spatial frequency characteristics of the displayed image agree with target spatial frequency characteristics.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: December 25, 2018
    Assignee: FUJIFILM Corporation
    Inventor: Kazuchika Iwami
  • Patent number: 10082729
    Abstract: A projector includes a light source device, a light modulating device, a projection optical device, and an adjusting device that rotates the projection optical device about a rotation axis along a direction orthogonal to a central axis of the projection optical device. The adjusting device includes a rotating member that supports the projection optical device and rotates about the rotation axis, a support member that supports the rotating member, and a drive device that rotates the rotating member. The drive device includes a motor and a transmission device that rotates the rotating member with power of the motor. The motor includes a spindle that transmits the power to the transmission device. The spindle is disposed along the rotation axis.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: September 25, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Takuya Hatano
  • Patent number: 10073329
    Abstract: An optical compensation element adjusting mechanism capable of adjusting an inclination of an optical compensation element with high accuracy and a projector. The mechanism includes an optical compensation element which optically compensates a liquid crystal panel and an adjusting frame which adjusts an angle of the element to the liquid crystal panel. The adjusting frame includes an approximately rectangular holding portion which holds the optical compensation element, a pair of fixing portions which respectively extends from positions, which become a diagonal, of the holding portion in a direction intersecting with the holding portion and which is respectively fixed to a first holding member to which the adjusting frame is attached, and an adjusting portion which is disposed at a position away from the pair of fixing portions and which inclines the optical compensation element by inclining the holding portion around a virtual line connecting the pair of fixing portions.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: September 11, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Kazuyuki Iinuma
  • Patent number: 10013925
    Abstract: A display device, a light converting device and a display system are provided. The display device includes a light-emitting module configured to emit at least two non-visible lights, non-visible lights of different types having different wavelengths; and a control module configured to control the light-emitting module to alternately emit the at least two non-visible lights at a wavelength adjusted timing, and to send a synchronous signal to a light converting device, the synchronous signal being configured to reflect the wavelength adjusted timing.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: July 3, 2018
    Assignees: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Co., Ltd.
    Inventors: Quan Gan, Lei Guo, Yongcan Wang, Yong Jun Yoon
  • Patent number: 9976563
    Abstract: An electric device having a casing with an air-outlet, and a main unit disposed inside the casing, includes a first temperature sensor configured to detect the temperature inside the casing, a second temperature sensor installed in the vicinity of the air-outlet, and an electric fan configured to generate an airflow from the air-outlet toward the inside of the casing at the time of the low-temperature startup such that the temperature detected by the first temperature sensor is lower than a preset first threshold value, and the temperature detected by the second temperature sensor is higher than the temperature detected by the first temperature sensor.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: May 22, 2018
    Assignee: NEC CORPORATION
    Inventors: Kumiko Suzuki, Jun Yokoyama
  • Patent number: 9927688
    Abstract: The illumination optical system illuminates an illumination surface. The illumination optical system includes a first optical system configured to cause a light flux from a light source to form a light source image, and a second optical system configured to introduce the light flux from the first optical system to the illumination surface. The second optical system includes in order from a first optical system side, a first lens having a positive power, a second lens having a negative power, and a third lens having a positive power. The second optical system satisfies conditions of 0.20??2/?3?0.75 and 0.4?BF/Fall<1.0 where ?2 represents an abbe number of the second lens, ?3 represents an abbe number of the third lens, Fall represents a focal length of the second optical system, and BF represents an air-equivalent distance from the third lens to the illumination surface.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: March 27, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yuuki Maeda
  • Patent number: 9891309
    Abstract: Various embodiments of TOF depth cameras and methods for illuminating image environments with illumination light are provided herein. In one example, a TOF depth camera configured to collect image data from an image environment illuminated by illumination light includes a light source including a plurality of surface-emitting lasers configured to generate coherent light. The example TOF camera also includes an optical assembly configured to transmit light from the plurality of surface-emitting lasers to the image environment and an image sensor configured to detect at least a portion of return light reflected from the image environment.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: February 13, 2018
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Joshua Mark Hudman, Prafulla Masalkar
  • Patent number: 9885944
    Abstract: A holding mechanism for holding an image display element to a prism includes: a first fixing member fixed to the prism by an adhesive; and a second fixing member, which is fixed to the first fixing member using a screw, and which has the image display element directly or indirectly fixed to the second fixing member. A protruding section is provided at the periphery of a hole to be used for the purpose of fixing using the screw, and at the time of fixing the second fixing member to the first fixing member using the screw, the first fixing member and the second fixing member are directly or indirectly brought into contact with each other at the protruding section such that deformation due to screwing of the screw does not generate within a bonding region of the first fixing member.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: February 6, 2018
    Assignee: Konica Minolta, Inc.
    Inventor: Daisuke Haga
  • Patent number: 9868400
    Abstract: Provided is an image display mirror that includes a half mirror and an image display apparatus, reduces an influence of a reflected image provided by the half mirror, and is excellent in visibility of an image displayed on the image display apparatus. The image display mirror for a vehicle includes: a first polarizing plate; a first liquid crystal cell; a half mirror; and an image display apparatus in the stated order from a viewer side, in which in the first liquid crystal cell, a state in which a polarization direction of incident linearly polarized light is maintained and a state in which the incident linearly polarized light is transformed into circularly polarized light are switched in accordance with a voltage to be supplied.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: January 16, 2018
    Assignee: NITTO DENKO CORPORATION
    Inventors: Katsunori Takada, Kentarou Takeda, Tadatoshi Nakanishi, Tadayuki Kameyama, Hiroki Kuramoto
  • Patent number: 9864262
    Abstract: An image projection device includes: an image generating unit that includes an optical modulation element generating an image using light emitted from a light source; an illumination optical unit that includes one or more optical elements guiding the light emitted from the light source to the image generating unit; a projecting unit that projects the image generated by the image generating unit; a first control unit that performs control to move the image generating unit movable with respect to the illumination optical unit; and a second control unit that performs control to move an illumination area indicating an area illuminated with the light guided to the image generating unit by the illumination optical unit according to a movement amount of the image generating unit.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: January 9, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tetsuya Fujioka, Akihisa Mikawa, Hideo Kanai, Yasunari Mikutsu, Satoshi Tsuchiya, Jun Mashimo, Yoshio Kubo
  • Patent number: 9860498
    Abstract: The invention relates to a projector (1) and to a projection optics (30) for a projector (1). In order to be able to operate the projector (1) as energy-efficiently as possible, it is provided, according to the invention, that the projector (1) comprises a beam splitter device (6, 6?) having a polarization beam splitter (7, 15), wherein the polarization beam splitter (7) is arranged at an object-side end (39) of the projection optics (30).
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: January 2, 2018
    Assignee: Jabil Optics Germany GmbH
    Inventor: Eberhard Piehler
  • Patent number: 9769464
    Abstract: An image display device is provided. The image display device includes a light source and a polarizer including a first polarizing region configured to linearly polarize light which is output from the light source and a second polarizing region configured to circularly polarize light which is output from the light source.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: September 19, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Keun Bae Jeon, Masaru Minami, Hyeong Sik Choi
  • Patent number: 9760013
    Abstract: Provided is an exposure apparatus including a transporting section; a first polarized light output section that outputs first polarized light; a second polarized light output section that outputs second polarized light; a first mask section that has formed therein a first aperture section that passes the first polarized light for exposing an orientation film and blocks the first polarized light; and a second mask section that has formed therein a second aperture section that passes the second polarized light for exposing the orientation film and blocks the second polarized light. The first aperture section and the second aperture section are formed to expose a certain region of the orientation film in an overlapping manner.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: September 12, 2017
    Assignee: ARISAWA MFG. CO., LTD
    Inventors: Yasuaki Umezawa, Tatsuya Sato, Kazuhiro Ura, Kenichi Watabe, Yuichi Kakubari
  • Patent number: 9733554
    Abstract: A projector includes an illumination unit having an optical system including a light source apparatus, an image formation unit having an optical system including liquid crystal panels, a projection unit having an optical system including a projection lens, and a base frame on which the illumination unit and the projection unit to which the image formation unit is coupled are disposed, and a gap is provided between the illumination unit and the projection unit.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: August 15, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Kaname Nagatani
  • Patent number: 9703015
    Abstract: A photomask for an optical element array includes first and second optical elements. A light transmission rate distribution includes a first area where the first optical element is to be formed, a second area where the second optical element is to be formed, and a third area between the first and second areas, has a first light transmission rate at an end portion of the first area. A second light transmission rate is higher than the first light transmission rate at another end portion. A third light transmission rate at an end portion corresponds to a boundary between the second and third areas. A fourth light transmission rate is higher than the third light transmission rate at another end portion of the second area. The light transmission rate distribution along a first direction is higher than a segment connecting the second and third light transmission rates in the third area.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: July 11, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuhiro Sekine, Mariko Furuta, Jun Iwata, Kyouhei Watanabe
  • Patent number: 9686517
    Abstract: An optical system includes an optical apparatus. The optical apparatus is for projecting a first projection image to a plane or detecting a first detected image of the plane. The optical apparatus includes a first image device, and a lens group. The first image device has an image surface having an image center. The lens group is disposed between the first image device and the plane and has a lens axis surface and an optic center. The optic center and the image center form a connection line. The plane has a tangent surface to an intersecting point of the connection line. The lens axis surface, the tangent surface, and an extension surface of the image surface substantially intersect at a straight line.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: June 20, 2017
    Assignee: Test Research, Inc.
    Inventors: Liang-Pin Yu, Chih-Tien Tsai, Yeong-Feng Wang
  • Patent number: 9684180
    Abstract: A color separating and/or combining system configured to guide blue (or first) light in a light beam from a light source to a blue-light (or first-light) liquid crystal panel and to guide red (or second) light to a red-light (or second-light) liquid crystal panel includes a PBS configured to guide one of the blue (or first) light and the red (or second) light in a direction different from a direction of the other color light, a quarter-wave plate, and a color separation element configured to guide the blue (or first) light to the blue-light (or first-light) liquid crystal panel and to suppress the red (or second) light from being guided to the blue-light (first-light) liquid crystal panel. The quarter-wave plate and the color separation element are provided between the blue-light (first-light) liquid crystal panel and the PBS. The color separation element is provided between the PBS and the quarter-wave plate.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: June 20, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuuki Maeda
  • Patent number: 9599866
    Abstract: On an active matrix substrate (5), metal electrodes (44) are provided below pixel electrodes (19). At least portions of a plurality of second thin-film transistors (second switching elements) (23b) are covered by light shielding films formed from the metal electrodes (44). The metal electrodes (light shielding films) (44) are covered by an interlayer insulating film (33) and an electrode film (CSa) of an auxiliary capacitance electrode (common electrode) (CS).
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: March 21, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masahiro Yoshida, Isao Ogasawara
  • Patent number: 9547224
    Abstract: A projector includes an apparatus casing, a light source module, a flow generating device, a sensing module, and a power module. The light source module is disposed inside the apparatus casing and includes a light-emitting part and a lampshade surrounding the light-emitting part. The flow generating device can generate an air flow for dissipating heat by the light source module. The sensing module is disposed in the apparatus casing and includes a thermo-sensitive component disposed near the lampshade and located in a flowing path of the air flow. The power module is disposed in the apparatus casing and electrically connected to the light source module and the sensing module. The power module selectively stops powering the light source module according to an electric parameter of the thermo-sensitive component. Thereby, the invention protects the projector from being overheated by use of the thermo-sensitivity of the thermo-sensitive component.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: January 17, 2017
    Assignee: Qisda Corporation
    Inventors: Fu-Shiung Shih, Chi-Jen Chen, Fang-Chieh Lu, Po-Fu Wu, Chun-Jung Hu
  • Patent number: 9465271
    Abstract: An object is to provide a display device that performs accurate display. A circuit is formed using a transistor that includes an oxide semiconductor and has a low off-state current. A precharge circuit or an inspection circuit is formed in addition to a pixel circuit. The off-state current is low because the oxide semiconductor is used. Thus, it is not likely that a signal or voltage is leaked in the precharge circuit or the inspection circuit to cause defective display. As a result, a display device that performs accurate display can be provided.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: October 11, 2016
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hajime Kimura, Atsushi Umezaki
  • Patent number: 9465222
    Abstract: A six-primary solid state illuminator is provided, including a blue light output unit. The blue light output unit continuously outputs a first blue light and a second blue light simultaneously. The wavelength of the first blue light differs from the wavelength of the second blue light. In a first mode, the first blue light and the second blue light are modulated into S-polarized and are output as a first combined light. In a second mode, the first blue light and the second blue light are modulated into P-polarized and are output as a second combined light.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: October 11, 2016
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: June Jei Huang
  • Patent number: 9429828
    Abstract: An image projection apparatus for projecting an image using light includes a light source configured to emit the light; and an operating unit configured to allow a user to operate the image projection apparatus, the operating unit being disposed above the light source when viewed from a placement surface on which a main body of the image projection apparatus is placed. The image projection apparatus also includes a first flow path in which air flows through the light source; and a second flow path different from the first flow path, the second flow path being formed between the light source and the operating unit.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: August 30, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tetsuya Fujioka, Masamichi Yamada, Yasutada Tsukioka, Naoyuki Ishikawa, Hideo Kanai
  • Patent number: 9335555
    Abstract: A converting device converts an unpolarized incident light into a polarized emitting light. The converting device includes a polarizing or polarization beam splitter, a converting module, and a retroreflector. The polarizing or polarization beam splitter splits the unpolarized incident light into a first polarization wave and a second polarization wave, the polarizing or polarization beam splitter reflecting the first polarization wave and allowing the second polarization passing through thereon. The converting module receives the second polarization wave and converting the polarization direction of the second polarization wave to match or approximate a polarization direction of the first polarization wave, and guiding the converted second polarization wave to an output direction. The retroreflector is coupled to the polarizing or polarization beam splitter and reflects the first polarization wave to the output direction.
    Type: Grant
    Filed: October 18, 2014
    Date of Patent: May 10, 2016
    Assignee: NATIONAL TAIWAN NORMAL UNIVERSITY
    Inventors: Tun-Chien Teng, Li-Wei Tseng
  • Patent number: 9252875
    Abstract: A method for aligning among visible light communication devices comprises the following steps: generating a visible light signal and transmitting same to a corresponding device; determining whether the visible light signal that is output via the screen of the device is identifiable; correcting the color of the visible light signal that is output on the screen if the visible light signal is not identifiable; and using the visible light signal that is corrected to perform alignment for visible light communicating with the corresponding device.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: February 2, 2016
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Tae-Han Bae, Jae-Seung Son, Eun-Tae Won
  • Patent number: 9229263
    Abstract: A liquid crystal display device includes first and second polarizers with absorption axes orthogonal to each other; first and second substrates between the first and second polarizers and at least one of which has a transparent electrode; and a twisted-nematic liquid crystal cell disposed between the first and second substrates, wherein a light scattering film is provided at a viewing side of the first and second polarizers and includes a support member and a liquid crystal layer composed of a liquid crystal compound, wherein the pitch of the liquid crystal compound ranges between 0.35 ?m and 3 ?m and is oriented at 45° relative to a liquid-crystal direction of the liquid crystal display device, wherein the liquid crystal layer has a thickness between 0.17 ?m and 10 ?m, and wherein a weighted scattering area ratio of a goniophotometer scattering profile of the light scattering film satisfies the following expression.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: January 5, 2016
    Assignee: FUJIFILM CORPORATION
    Inventors: Megumi Sekiguchi, Shinichi Morishima, Takashi Yonemoto, Hiroshi Sato, Taketo Otani
  • Patent number: 9217875
    Abstract: A multi-view auto-stereoscopic display is provided. The display includes an angle-magnifying screen for magnifying the view angle of an image light beam from a projection head. The angle-magnifying screen includes a first lens unit, a central lens unit, and a second lens unit arranged sequentially. The first lens unit is configured for receiving the image light beam. The central lens unit is configured for redirecting the image light beam from the first lens unit to the second lens unit. The second lens unit is configured for magnifying the view angle of the image light beam.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: December 22, 2015
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: June Jei Huang
  • Patent number: 8780014
    Abstract: A head-mounted display apparatus includes a head-mounted display, the head-mounted display including a plurality of independently controllable switchable viewing areas that can each be independently switched between a transparent state and an information state. The transparent state enables a user of the head-mounted display to see the scene outside the head-mounted display through the independently controllable switchable viewing areas. The information state is opaque and displays information in the independently controllable switchable viewing areas visible to a user of the head-mounted display. Circuitry produces a control signal for controlling the states of the independently controllable switchable viewing areas and a controller responsive to the control signal independently switches each of the independently controllable viewing areas between the transparent state and the information state.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: July 15, 2014
    Assignee: Eastman Kodak Company
    Inventors: John N. Border, Ronald S. Cok, Elena A. Fedorovskaya, Sen Wang
  • Patent number: RE40675
    Abstract: A method An apparatus and system for producing a digital video signal from an analog video signal, the analog video signal including an analog video data signal that is raster scanned in lines across a CRT screen to form consecutive frames of video information, the raster scanning controlled by use of a horizontal synchronizing signal (Hsnyc) (Hsync) that controls a line scan rate, and a vertical synchronizing signal (Vsnyc) (Vsync) that controls a frame refresh rate, to produce consecutive frames of video information, wherein the digital signal is produced by generating a pixel clock signal with pixel clocks for repetitively sampling instantaneous values of the analog video data signal, and digitizing the analog video data signal based on the pixel clock sampling.
    Type: Grant
    Filed: May 20, 2004
    Date of Patent: March 24, 2009
    Assignee: Infocus Corporation
    Inventor: Michael G. West