Reflector Between Lamp And Screen Patents (Class 353/77)
  • Patent number: 10321104
    Abstract: A multi-modal display device is presented. The display device has a shell having an internal projection screen and an opening, a projector emitting a projection beam from inside the shell. There is an optical guide adjusting a position of the projector to aim the projection beam at either the internal projection screen or the opening. A processor coupled to the optical guide may select a display position, wherein different display positions are associated with different display area sizes. The method includes determining a distance between a projector and a user, and automatically selecting a display mode based on the distance.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: June 11, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tao Ma
  • Patent number: 10054847
    Abstract: An angularly rotary projector includes a first housing, a rotating unit and a second housing, characterized in that the first housing is mutually connected with the second housing through the rotating unit; the rotating unit includes a main shaft, a fixed lateral plate and a movable lateral plate; the fixed lateral plate on the rotating unit is fixed in the first housing; the movable lateral plate on the rotating unit is fixed in the second housing; the first housing and the second housing are angularly adjusted by using the rotating unit; the rotating unit is installed on one side of each one of the first housing and the second housing, and a fitting unit is disposed on the other side of each one of the first housing and the second housing.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: August 21, 2018
    Inventor: Hui Zhao
  • Patent number: 9971141
    Abstract: Regarding a sighting telescope comprising an objective and a reversing system, a first and second image planes respectively being configured between the objective and the reversing system and on a reversing system's side facing away from the objective, where an intermediate image projected by the objective into to the first image plane is reproduced into the second image plane, the invention stipulates an optical unit situated on the reversing system's side away from the objective to make visible the intermediate image in the second image plane.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: May 15, 2018
    Assignee: Schmidt & Bender GmbH & Co. KG
    Inventor: Helke Karen Hesse
  • Patent number: 9759992
    Abstract: According to one embodiment, a projection apparatus including: a first screen; a projection unit configured to project an image on a projection area including the first screen; a second screen configured to be capable of being disposed at a position within the projection area of projection by the projection unit and away from the first screen; a shifting mechanism configured to shift the second screen; and a screen controller configured to shift the second screen by the shifting mechanism in accordance with an image which is projected by the projection unit.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: September 12, 2017
    Assignee: CASIO COMPUTER CO., LTD.
    Inventor: Minoru Suzuki
  • Patent number: 9482866
    Abstract: An optical projection system enlarges an image on an image display element and projects the enlarged image onto a screen. The system includes the image display element, a first optical system including lens groups arranged in order from an image display element side, a lens barrel holding the lens groups, and a free-form surface lens rotationally asymmetric and made from plastic, and a second optical system including a curved mirror disposed after the first optical system, wherein the free-form surface lens is formed to decrease in thickness from an intersection point between a surface of the free-form surface lens and an optical axis of the first optical system to an outer periphery of the lens along a line extending to the outer periphery.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: November 1, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventor: Nobuyuki Arai
  • Patent number: 9004699
    Abstract: A light source system for use in a projector is provided. The light source system comprises a main optical axis, a first sub-optical axis, a second sub-optical axis, at least one first optical module, at least one second optical module and a third optical module. The at least one first optical module comprises a first light source array and a second light source array for emitting a plurality of first beams and a plurality of second beams respectively. The at least one second optical module comprises a third light source array for emitting a plurality of third beams. The third optical module integrates the first beams, the second beams and the third beams into a main beam for projection along the main optical axis.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: April 14, 2015
    Assignee: Delta Electronics, Inc.
    Inventor: June-Jei Huang
  • Patent number: 8936366
    Abstract: There is provided a robot that includes a processor executing instructions that determine a desired image to be displayed. The processor issues control signals corresponding to the desired image to be displayed. The robot also comprises a display assembly including a visual projector, a mirror, and a display surface. The visual projector and mirror are disposed within the robot. The visual projector projects light corresponding to the desired image onto the mirror. The mirror receives the light from the projector, and reflects the light onto the display surface. The display surface receives the light. The image is visible on the display surface from outside the robot.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: January 20, 2015
    Assignee: Microsoft Corporation
    Inventors: Efstathios Papaefstathiou, Russell Sanchez, Nathaniel T. Clinton
  • Patent number: 8840250
    Abstract: An augmented reality environment allows interaction between virtual and real objects. Various surfaces within the environment such as walls, tables, countertop, chairs, floor, ceiling, and so forth may be used as projection surfaces. Qualified projection surfaces are determined, and an initial projection surface is selected for use from these. This selection may take into account user preferences, user orientation, types of image to be projected, and so forth. Other qualified projection surfaces may have visual indicators projected thereon, indicating relative suitability for use as a projection surface.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: September 23, 2014
    Assignee: Rawles LLC
    Inventors: Ning Yao, William Spencer Worley, III, Edward Dietz Crump
  • Patent number: 8746894
    Abstract: Methods and systems for displaying three-dimensional (3D) images using motion parallax are described. Images are projected onto a reflector with a rippled or faceted surface. The reflected images are viewed at a plurality of viewing locations and a different image is perceived according to the viewing location.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: June 10, 2014
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Robin A. Atkins
  • Patent number: 8733943
    Abstract: In a back-projection image display device, image light outputted from a projection device is reflected by a reflection mirror held by a base frame and projected onto the back of a screen, to display an image on the screen. An image distortion correcting mechanism includes adjustment mechanisms that deform the reflection mirror, drive units that generate driving force necessary for the deformation of the reflection mirror by the adjustment mechanisms, and a control substrate that supplies power to the drive units. The control substrate supplies power to the drive units in response to a control signal supplied from a remote control unit. This allows pin distortion and barrel distortion, as well as trapezial distortion to be corrected by remote control in the back-projection image display device.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: May 27, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventor: Toshitaka Tachibana
  • Patent number: 8665381
    Abstract: One embodiment of a viewing cone adjustment system includes a projection lens that defines a projection lens optical axis adjustably offset from a viewing screen optical axis, and an image source device that defines an image source optical axis adjustably offset from the projection lens optical axis.
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: March 4, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Brett E. Dahlgren
  • Patent number: 8657450
    Abstract: A projection optical system includes a first optical system, a second optical system, and first and second reflection mirrors. The first and second reflection mirrors are arranged on an optical path between an image forming element and a reflection surface of the second optical system, so that a direction of an optical path of light beams from the second reflection mirror to the reflection surface contains a component of a direction opposite to a predetermined direction from the image forming element to the first optical system, and a projection image of the image forming element on a conjugate surface, a projection of the reflection surface onto the conjugate surface, and a projection of the image forming element onto the conjugate surface are arrayed in this order on the conjugate surface.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: February 25, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Issei Abe, Kazuhiro Fujita, Tatsuya Takahashi
  • Patent number: 8591038
    Abstract: A projection type image display apparatus in one aspect of the present invention includes an optical engine that projects an image; an image display screen that displays an image of projection light projected from the optical engine; a folding mirror that reflects the projection light projected from the optical engine toward the image display screen; and an optical system support member that holds the optical engine, a rear side part of the folding mirror and the image display screen. The image display screen holds a front side part of the folding mirror by an upper side part of the image display screen.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: November 26, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventor: Norichika Sugano
  • Patent number: 8577178
    Abstract: An image processing device includes: a transformation ratio calculation unit which calculates transformation ratio of an image after transformation, the image after transformation being obtained by transforming an original image under predetermined rule; a filter coefficient calculation unit which calculates filter coefficients based on the transformation ratio; and a pixel value calculation unit which calculates the pixel value of each pixel in the image after transformation using the filter coefficients and outputs the pixel value of the image after transformation as image data after transformation.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: November 5, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Akihiko Tamura
  • Patent number: 8562145
    Abstract: A system for projecting changeable electronic content, such as video or digital still images, onto a curved surface. The system includes a housing, a reflector within the housing, and a projector. The housing has an exterior surface and an interior space. At least a portion of the exterior surface is a curved display surface capable of displaying electronic content projected upon it, and at least one portion of the exterior surface has an aperture through the exterior surface to the interior space. The projector is located proximate the aperture for projecting content through the aperture to the reflector. When the projector receives converted content and projects the converted content through the aperture to the reflector, the curved display surface displays the converted content undistorted to a viewer. The system can also provide for display of branded content on a product container having a shape corresponding with the brand.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: October 22, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Ralph R. Roberts, Glenn E. Casner, Brett J. Sitter, Jane K. Wardhana, Brian T. Weber, Kenneth A. Epstein, Martin B. Wolk, Patrick A. Thomas
  • Patent number: 8474984
    Abstract: A projection display device includes a light source, an optical intensity-equalizing element, an optical modulating element, an optical diffusion element, a relay optical system that is configured such that an output end of the optical intensity-equalizing element and a display element plane of the optical modulating element are optically conjugate, and a projection optical system. The relay optical system includes a first lens unit that condenses a light from the optical intensity-equalizing element and a second lens unit that further condenses a light from the first lens unit. The optical diffusion element is arranged between an light incident side of the first lens unit and the optical intensity-equalizing element. An optical axis of the second lens unit and a center of the output end of the optical intensity-equalizing element are shifted in a same direction from an optical axis of the first lens unit.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: July 2, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinji Yagyu, Koji Nakanishi
  • Patent number: 8459798
    Abstract: An illumination apparatus includes a light source, a polarization splitter disposed facing the light source at about 45 degrees with respect to its light emission direction, a first reflector reflecting and condensing one of the polarization light components polarized and split by the polarization splitter, a quarter wave plate disposed between the polarization splitter and the first reflector, a second reflector reflecting and condensing the other of the polarization light components polarized and split by the polarization splitter, a third reflector disposed around the light source and reflecting the other polarization light reflected by the second reflector and the polarization splitter and proceeding in the light source direction, and a quarter wave plate disposed between the polarization splitter and the third reflector and around the light source, the light reflected at the first reflector and reflected at the polarization splitter being used to illuminate a predetermined surface.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: June 11, 2013
    Assignee: Nikon Corporation
    Inventor: Nobuhiro Fujinawa
  • Patent number: 8451107
    Abstract: An imaging system for a vehicle includes an imaging sensor (12) and a display device (15) for displaying images representative of image data captured by the imaging sensor. The imaging sensor (12) has a rearward field of view when mounted at the vehicle. The imaging system generates a plurality of graphic overlays (130a, 130b, 130c) on the displayed images to enhance the driver's cognitive awareness of an object rearward of the vehicle. The graphic overlays comprises a plurality of graphic overlay segments. The graphic overlay segments convey three dimensional information to a person viewing the displayed images and the graphic overlays. The imaging system may adjust at least one of a color, an intensity and a rate of flashing of at least one of the plurality of graphic overlay segments in response to an object being detected rearward of the vehicle and within a distance threshold.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: May 28, 2013
    Assignee: Magna Electronics, Inc.
    Inventors: Yuesheng Lu, Joel S. Gibson, Michael J. Higgins-Luthman, Steven V. Byrne, Richard D. Shriner
  • Patent number: 8439506
    Abstract: A reflector mounting structure includes a reflector and a fixing member. The reflector includes: a reflecting surface; a reflector body having the reflecting surface formed thereon; a pair of first connecting units provided respectively at an end face of the reflector body and having a substantially spherical first protrusion at an end thereof; and a second connecting unit provided at an end face of the reflector body. The fixing member which supports the reflector includes a pair of first supporting units respectively having a planar contact portion and bringing the contact portion into contact with an end of the first protrusion, and a second supporting unit. A contact-portion vertical distance is set such that the first protrusion moves while rolling with respect to a contact portion when the reflector deforms.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: May 14, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoru Okagaki, Norihiro Watanabe, Atsushi Michimori
  • Patent number: 8425049
    Abstract: A projection type display apparatus including an oblique projection optical system having a plurality of lenses is disclosed. A lens nearest to a projection screen has a vertical effective image area through which a light flux passes. The lens is arranged at a position not including an optical axis shared by the largest number of lenses among the plurality of lenses. A flat mirror for returning the optical path is arranged between the particular lens and the projection screen at a predetermined angle to the optical axis. An enlarged image obtained by the light flux returned by the flat mirror is formed toward a display screen.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: April 23, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Koji Hirata, Masahiko Yatsu, Naoyuki Ogura
  • Patent number: 8419191
    Abstract: An optical system with short total length to project a high quality large image. The system projects an image onto a projection surface, and includes a lens system having a plurality of lenses, and one or more curved mirrors. Light flux of an enlarged image shooting out from the lens system to the projection surface is incident onto a mirror surface of the one of the curved mirrors first of all. Distances OAL and Y satisfy a requirement 20 <OAL/Y <30. OAL is between the image surface and the surface of the curved mirror nearest the projection surface and along an optical path shared by the most lenses of the lens system, and on the image surface. Y is between the optical axis shared by the most lenses and an edge of the image surface which is farthest from the optical axis shared by the most lenses.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: April 16, 2013
    Assignee: Ricoh Optical Industries, Co., Ltd.
    Inventors: Osamu Nagase, Yoshitsugu Kono
  • Patent number: 8403502
    Abstract: A front-projection display system having a screen with improved brightness and/or resolution of an image displayed on outer portions thereof. The screen has a display surface that is generally a convex shape having a curvature of the display surface in the vertical direction of an image projected thereon that is less than a curvature of the display surface in the horizontal direction.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: March 26, 2013
    Assignee: Barco N.V.
    Inventor: Moshe Oren
  • Patent number: 8388147
    Abstract: A screen assembly and a rear-projection type graphic display device are provided to block overscanned light Lo projected outside a fresnel lens screen. The screen assembly 20A includes the fresnel lens screen 21, a screen retainer 22 and a light blocking member 23. The fresnel lens screen 21 forms an image on the side of a front surface 21b by image light Le incoming through a back surface 21a. The screen retainer 22 has a back surface 22a whose area is larger than the back surface 21a and the front surface 21b and which is opposed to the front surface 21b to hold it, and a front surface 22b located on opposite side of the back surface 22a to allow an image formed by the image light incoming through the back surface 21a to be visible through the front surface 22b. The screen retainer 22 has an optical transparency. The light blocking member 23 is arranged so as to surround respective side surfaces of the screen 21 in the form of a frame.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: March 5, 2013
    Assignee: JVC Kenwood Corporation
    Inventors: Toshitaka Murata, Ryusaku Takahashi, Masahiko Miyake, Manabu Kobayashi, Takatsugu Aizaki, Hironobu Fukutomi
  • Patent number: 8371699
    Abstract: An image display device having a screen having a fluorescent region including a fluorescent material; a light irradiation system, including a first light source outputting excitation light exciting the fluorescent material; a second light source outputting visible light; a scanning unit scanning with a light beam output from each of the first light source and the second light source on the screen; and an excitation light wavelength band reflector reflecting light in a wavelength band of the excitation light toward the screen, and formed on an output side of a light beam from the light irradiation system with respect to the screen. The visible light output from the second light source is diffused by the screen, while the excitation light output from the first light source develops a color different from that of the visible light by being projected in the fluorescent region.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: February 12, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Norio Nakamura
  • Patent number: 8366279
    Abstract: An image display apparatus includes plural image forming devices and an observation optical system that includes at least a first optical system configured to fold in a first section a luminous flux from a first image forming device by using a plurality of reflective surfaces and to guide the luminous flux from the first image forming device to the exit pupil, and a second optical system configured to fold in a second section a luminous flux from a second image forming device by using a plurality of reflective surfaces and to guide the luminous flux from the second image forming device to the exit pupil, wherein the first section intersects the second section on an axis that directs from one point in the exit pupil to one point in the observation field.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: February 5, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazutaka Inoguchi, Masakazu Tohara, Shoichi Yamazaki, Kenichi Saito, Motomi Tsuyuki
  • Patent number: 8337024
    Abstract: A projection optical system for enlarging and projecting a light flux from an image display panel modulating an irradiation light, onto a screen in an oblique direction, the projection optical system includes: a lens system including a plurality of lenses, the lens system refracting the light flux from the image display panel; a single convex mirror reflecting the light flux from the lens system, the lens system and the convex mirror being arranged in an order from the image display panel; and a stop disposed in an optical path after an emission from the lens system to an incidence on the convex mirror.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: December 25, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Muneharu Kuwata, Tomohiro Sasagawa
  • Patent number: 8308305
    Abstract: A projector includes: a light source device, a color-separating optical system for separating a light beam irradiated by the light source device into a plurality of color light components, a plurality of optical modulators for modulating each of the separated color light components in accordance with image information, a color-combining optical device for combining optical images modulated by the plurality of optical modulators and a projection optical device for projecting the combined optical images in an enlarged manner. An optical filter that reflects a predetermined spectral component of the light beam and transmits the other spectral component is disposed in an optical path between the light source device and the optical modulators The optical filter is disposed such that a light-irradiation side surface for irradiating the light beam is inclined by a predetermined angle relative to a plane orthogonal to an optical axis of the light beam.
    Type: Grant
    Filed: August 14, 2006
    Date of Patent: November 13, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Kiyotaka Nakano, Osamu Fujimaki, Ryo Hyodo
  • Patent number: 8284462
    Abstract: Disclosed is an image reading device configured to read information of an object, including an imaging optical system configured to image an image of an object and an image-capturing device configured to image-capture at least a portion of the image imaged by the imaging optical system, wherein the imaging optical system includes a first optical system configured to image an intermediate image of the object and a second optical system configured to image the imaged image of the intermediate image.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: October 9, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Issei Abe, Kiichiro Nishina, Masahiro Itoh, Kazuhiro Fujita
  • Patent number: 8220931
    Abstract: A stereoscopic digital image projecting system has a light source system energizable to provide polarized illumination having a first polarization state and a beam splitting system alternately generating first and second light beams having different polarization states from the polarized illumination. A combining system has a polarization beam combiner that combines the first and second light beams into a combined light beam. A spatial light modulator is used to modulate the combined light beam in a manner consistent with stereoscopic image data to form a first modulated image from illumination in the combined light beam having the first polarization state and to form a second modulated image from illumination in the combined light beam having the second polarization state. Projection optics are configured to project the first and second modulated images onto a display surface.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: July 17, 2012
    Assignee: Eastman Kodak Company
    Inventors: Barry D. Silverstein, James R. Kircher, Joseph R. Bietry
  • Patent number: 8210693
    Abstract: A projection type image display apparatus includes: a light source; an illumination optical system that uniformly illuminates beams, which are emitted from the light source, on a surface of an image modulation element as a primary image plane; and a projection optical system that projects image information of the primary image plane modulated by the image modulation element on a screen as a secondary image plane in an enlarged manner. The projection optical system includes a first optical system having a positive refractive power and including a plurality of transmissive surfaces, and a second optical system having a positive refractive power and including a concave reflective surface. The first optical system has a first reflective surface disposed between any surfaces of the plurality of transmissive surfaces, and a second reflective surface disposed between the first optical system and second optical system.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: July 3, 2012
    Assignee: Sony Corporation
    Inventor: Jun Nishikawa
  • Patent number: 8201948
    Abstract: An image display device having a screen having a fluorescent region including a fluorescent material; a light irradiation system, including a first light source outputting excitation light exciting the fluorescent material; a second light source outputting visible light; a scanning unit scanning with a light beam output from each of the first light source and the second light source on the screen; and an excitation light wavelength band reflector reflecting light in a wavelength band of the excitation light toward the screen, and formed on an output side of a light beam from the light irradiation system with respect to the screen. The visible light output from the second light source is diffused by the screen, while the excitation light output from the first light source develops a color different from that of the visible light by being projected in the fluorescent region.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: June 19, 2012
    Assignee: Seiko Epson Coporation
    Inventor: Norio Nakamura
  • Patent number: 8167437
    Abstract: A projection display is provided with a light engine including a damped piezo-electric smooth picture actuating device. The light engine comprises a mirror and an actuator for positioning the mirror. The actuator includes a tilting means that couples the actuator to the mirror. The tilting means has damping material attached thereto. The damping material may be a polymeric material.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: May 1, 2012
    Assignee: Thomson Licensing
    Inventor: Scott Allen Rottler
  • Patent number: 8152314
    Abstract: A display device (100) of the present invention has a first switch (3) and a second switch (4) on an upper surface of its casing, and includes a control circuit (18) for controlling the first switch (3) and the second switch (4) and a light source (19) inside the casing. The control circuit (18) performs control so that the light source (19) is turned on when the second switch (4) is pressed after a predetermined period of time has passed from when the first switch (3) was pressed. Thereby, the display device (100) of the present invention prevents entering of a person into a projection area before projection of video, and controls inadvertent start-up.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: April 10, 2012
    Assignee: Panasonic Corporation
    Inventors: Toshifumi Yokoyama, Ken'ichi Kasazumi, Shin-ichi Kadowaki, Kiminori Mizuuchi, Hiroyuki Furuya, Kazuhisa Yamamoto
  • Patent number: 8144263
    Abstract: The disclosed embodiments relate to a system and method for medium wide angle projection system. An exemplary embodiment of the present technique comprises an imaging system configured to create an image, at least one lens configured to produce a medium wide-angle representation of the image, and an aperture stop positioned to capture the medium wide-angle representation of the image from the at least one lens.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: March 27, 2012
    Assignee: TTE Technology, Inc.
    Inventors: Estill Thone Hall, Jr., Jingbo Cai, Eugene Murphy O'Donnell
  • Patent number: 8128238
    Abstract: Disclosed is a projection optical system including a projection surface configured such that an image conjugate to an object is projected, plural optical elements having a refractive power, and a deflecting element having no refractive power configured to deflect an optical path of a light beam and to pass the light beam having a deflected optical path between the plural optical elements, wherein a normal line of the projection surface at a center of the projection surface does not pass through the plural optical elements or between the plural optical elements.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: March 6, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuhiro Fujita, Atsushi Takaura, Issei Abe
  • Patent number: 8128234
    Abstract: A position adjustment device for an integration rod includes a fixed plate, two resilient members, and two adjusting screws. The first resilient member is positioned between the fixed plate and the rod for exerting an elastic force on the rod in a first direction, and the second resilient member is positioned between the fixed plate and the rod for exerting an elastic force on the rod in a second direction different from the first direction. The first adjusting screw is inserted through the part of the housing and has a first end surface that presses against one side surface of the rod opposite the first resilient member. The second adjusting screw is inserted through the part of the housing and has a second end surface that presses against one side surface of the rod opposite the second resilient member. The first and the second end surface are arc surfaces.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: March 6, 2012
    Assignee: Coretronic Corporation
    Inventors: Chien-Chang Huang, Yung-Chuan Tseng
  • Patent number: 8113663
    Abstract: In a projection type image display apparatus, for enlarging an image on a image display apparatus 1 by means of a projection lens 2, thereby projecting the enlarged image onto a screen 6, obliquely, being inclined thereto, between the projection lens 2 and a rear-surface mirror 5, there are disposed free shaped surface mirrors 3 and 4, each having a free shaped surface for compensating a trapezoidal distortion due to oblique projection of the enlarged image. The surface configuration of the free shaped surface mirror is so shaped as to satisfy a following equation: |L1?L2|>1.4·Dv if assuming that a distance for a light beam of an upper end of the enlarged image to reach the screen after being reflected upon a free shaped surface is “L1”, a distance for a light beam of a lower end of the enlarged image to reach the screen after being reflected upon the free shaped surface is “L2”, and a distance from an upper end of an image on the screen to a lower end thereof is “Dv”.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: February 14, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Takanori Hisada, Masahiko Yatsu, Koji Hirata
  • Patent number: 8061856
    Abstract: The present invention provides a projection apparatus, comprising: a light source; a spatial light modulator for modulating the incident light emitted from the light source; a spatial light modulator control unit for generating, from an inputted image signal, a control signal for driving the spatial light modulator; and a light source control unit for receiving data corresponding to the control signal for controlling the light source to operate in one of three states consisted of a driven state, a stopped state and a standby state on the basis of the data.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: November 22, 2011
    Assignees: Silicon Quest Kabushiki-Kaisha, Olympus Corporation
    Inventors: Akira Shirai, Fusao Ishii
  • Patent number: 8049860
    Abstract: A glass substrate for a reflective mirror of a rear projection television (RPTV) which ensures display quality by quantitative control, and can reduce control cost and manufacture cost is provided. A reflective mirror 3 of the rear projection television (RPTV) includes a float glass plate (glass substrate) 1 formed to have a plate thickness of 3 mm by a float process, and a reflection enhancing film 2 constituted of aluminum (Al) formed on one surface 1a of the glass substrate 1 by a sputtering method. In the measurement condition of a cut-off value of 0.8 to 8 mm, the maximum amplitude of a filtered waviness curve is 0.1 ?m or less, the maximum value of a viewability index value ? (=A/D3) in a range of spatial frequencies 2 to 500/mm by spectral analysis of the filtered waviness curve is 0.02 (/m2) or less, and an integral value of the viewability index value ? is 2.0 (/m3) or less.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: November 1, 2011
    Assignee: Nippon Sheet Glass Company, Ltd.
    Inventors: Masahiro Ikadai, Hirohiko Iwase, Naoki Kinugasa
  • Patent number: 8033667
    Abstract: An image display device includes: a screen having a fluorescent region including a fluorescent material; a light irradiation system, including: a first light source outputting excitation light exciting the fluorescent material; a second light source outputting visible light; a driving unit individually operating the first light source and the second light source corresponding to image information; and a scanning unit scanning with a light beam output from each of the first light source and the second light source in a main scanning direction and a sub-scanning direction intersecting with the main scanning direction on the screen; and an excitation light wavelength band reflector having a function to reflect light in a wavelength band of the excitation light toward the screen, and formed on an output side of a light beam from the light irradiation system with respect to the screen.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: October 11, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Norio Nakamura
  • Publication number: 20110234995
    Abstract: A projection type image display apparatus in one aspect of the present invention includes an optical engine that projects an image; an image display screen that displays an image of projection light projected from the optical engine; a folding mirror that reflects the projection light projected from the optical engine toward the image display screen; and an optical system support member that holds the optical engine, a rear side part of the folding mirror and the image display screen. The image display screen holds a front side part of the folding mirror by an upper side part of the image display screen.
    Type: Application
    Filed: March 22, 2011
    Publication date: September 29, 2011
    Inventor: Norichika SUGANO
  • Patent number: 8025415
    Abstract: A projection optical system including a first optical system configured to form a second image conjugate to a first image and a second optical system configured to include a reflective optical element which reflects light from the second image and to project a third image conjugate to the second image onto a projection surface is provided, wherein the first optical system includes a stop and at least one optical element with a positive refractive power and at least one optical element with a negative refractive power which are provided between the stop and the second image, and an optical element with a strongest positive refractive power in the at least one optical element with a positive refractive power is provided between the stop and an optical element with a strongest negative refractive power in the at least one optical element with a negative refractive power.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: September 27, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Issei Abe, Kazuhiro Fujita, Atsushi Takaura
  • Patent number: 8020999
    Abstract: A projection type image display apparatus includes an image display element, and a projection optical unit, which is configured to project an image displayed on the image display element, enlargedly, upon a screen. The projection optical unit includes a lens group, which is configured to compensate an distortion on an image surface on the screen, a mirror for compensating a trapezoidal distortion on the screen. The mirror reflects lights emitted from the lens group, so as to project upon the screen obliquely.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: September 20, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Koji Hirata, Takanori Hisada, Masahiko Yatsu
  • Publication number: 20110205500
    Abstract: Transmission-type screens are placed corresponding to a display board at a front area of the display board, on which an article is placed. Each of the screens transmits and projects a projector image luminous flux projected from a backside of the screens to a front side of the screens. When the projector image luminous flux is projected from the backside of the screens, each of inner circumferences which defines a space including an image projecting space for leading the projector image luminous flux to the backside of the screens without obstruction. A display shelf might have a projector and a computer. The projector projects the projector image luminous flux. The display shelf might have a reflecting mirror which lead the projector image flux to the screens.
    Type: Application
    Filed: May 3, 2011
    Publication date: August 25, 2011
    Applicant: Toshiba Tec Kabushiki Kaisha
    Inventors: Yoshihiko Ikeda, Hiroki Mochizuki, Masanori Takeuchi, Makoto Nozawa, Yun Wang
  • Patent number: 8004760
    Abstract: Various embodiments related to rear-projection image display are disclosed. For example, one disclosed embodiment provides a projector for projecting an image and a screen configured to display the image. The screen comprises a filter layer having a light reception side and an image display side. The filter layer includes an array of trapezoidal transmissive elements and an array of trapezoidal absorption elements, where a wider base of each of the trapezoidal transmissive elements faces the light reception side of the filter layer, and where a wider base of each of the trapezoidal absorption elements faces the image display side of the filer layer.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: August 23, 2011
    Assignee: Microsoft Corporation
    Inventors: Zhiqiang Liu, Prafulla Masalkar, Karlton Powell
  • Publication number: 20110188007
    Abstract: A dust-proof enclosure portion which stores therein an emission portion of a projection unit and in which a projection window from which image light is emitted is formed to direct upward, and a cabinet shielding structure which holds a screen on a front side, in which an opening that introduces the image light emitted from the projection window of the projection unit is included, and in which a second reflection mirror that reflects the introduced image light toward the rear surface of the screen is arranged are included, in which a second dust-proof cover is detachably attached to the opening (light introducing and managing opening) of the cabinet shielding structure, the projection window is exposed in a state where the second dust-proof cover is removed, and the cabinet shielding structure is a sealed structure in a state where the second dust-proof cover is attached.
    Type: Application
    Filed: January 31, 2011
    Publication date: August 4, 2011
    Inventors: Kenichiro Okura, Haruhiko Matoba
  • Patent number: 7972015
    Abstract: A projection type image display apparatus includes: a cabinet; a screen which is provided in the cabinet; a display device which is placed inside the cabinet and forms an image; and an optical system which projects an image formed by the display device to the screen and comprises at least one mirror, a supporter for supporting the mirror, and a frame through which the supporter is fastened to the cabinet, all of the mirror, the supporter and the frame being disposed within a single interior space formed by the cabinet and the screen.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: July 5, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-soo Lee, Kee-uk Jeon, Sang-ik Kim, Jae-geun Lim, Jung-hyeon Kim
  • Patent number: 7972011
    Abstract: An image projector according to the present invention includes a light source for emitting a laser beam, of which the intensity has been modulated in accordance with a modulation signal representing an image to be projected, and a beam deflection section for deflecting the laser beam two-dimensionally such that the image is produced by repeatedly scanning a screen with the laser beam in a predetermined pattern. The predetermined pattern has a repetitive frequency that is lower than a frame rate of the image.
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: July 5, 2011
    Assignee: Panasonic Corporation
    Inventors: Akira Kurozuka, Hironori Tomita
  • Patent number: 7972004
    Abstract: A system and method for uniform light generation in projection display systems. An illumination source comprises a light source to produce colored light, and a scrolling optics unit optically coupled to the light source, the scrolling optics unit configured to create lines of colored light from the colored light, and to scroll the lines of colored light along a direction orthogonal to a light path of the illumination source. The scrolling optics unit comprises a single light shaping diffuser to transform the colored light into the lines of colored light, an optical filter positioned in the light path after the light shaping diffuser, and a scrolling optics element positioned in the light path after the optical filter. The single light shaping diffuser is capable of simultaneously transforming colored light into lines of colored light having substantially uniform intensity to provide uniform illumination.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: July 5, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Terry Alan Bartlett, Paul L. Rancuret
  • Patent number: RE45258
    Abstract: In a projection optical system for use in an image projection apparatus illuminating an image display panel forming an image in accordance with a modulating signal with illumination light from a light source, the projection optical system includes first and second optical systems arranged along an optical path defining an upstream-downstream direction in the order described from upstream to downstream on the downstream side of the image display panel. The first optical system includes at least one dioptric system and has positive power. The second optical system includes at least one reflecting surface having power and has positive power. The image formed by the image display panel is formed as an intermediate image in the optical path, and the intermediate image is magnified and projected.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: November 25, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Atsushi Takaura, Kazuhiro Fujita, Nobuo Sakuma