Cabinet-type Projector Patents (Class 352/104)
  • Patent number: 9408260
    Abstract: An analog dimming conversion circuit includes a first voltage dividing unit, a second voltage dividing unit, and a constant voltage unit. An input end of the first voltage dividing unit receives an analog dimming input signal. An output end of the first voltage dividing unit outputs a first intermediate voltage. An output end of the constant voltage unit outputs a second intermediate voltage which is constant. A first input end and a second input end of the second voltage dividing unit receive the first intermediate voltage and the second intermediate voltage respectively. An output end of the second voltage dividing unit outputs an analog dimming output signal. The analog dimming conversion circuit of the present disclosure can be used in liquid crystal TV, liquid crystal display, mobile phone, tablet personal computer, and other display devices with analog dimming function.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: August 2, 2016
    Inventor: Xianming Zhang
  • Publication number: 20080088797
    Abstract: A mobile video display unit comprises a rear projection unit that projects at least one image onto a collapsible screen that surrounds the projection unit to permit viewing within a 360 degree radius of the unit. The collapsible screen can be perforated to permit air to diffuse through its surface and thereby providing resistance to wind loading.
    Type: Application
    Filed: May 16, 2007
    Publication date: April 17, 2008
    Inventor: Adam Salacuse
  • Patent number: 6793347
    Abstract: A video projector includes a cabinet, and adjusters provided in bottom and top surfaces of the cabinet and located on left and right positions of the bottom and top surfaces close to the front surface of the cabinet. The adjusters are supported by shafts perpendicular to the front surface so as to be rotatable in an angular range of 90°. When the adjusters are postured to be perpendicular to bottom and top surfaces of the cabinet, the cabinet is placed horizontally. When the adjusters are postured to be perpendicular to left and right side surfaces of the cabinet, the cabinet is placed vertically. Since a horizontal/vertical placement change-over switch is operated in accordance with the horizontal/vertical placement of the cabinet, a video image can be projected correctly onto a screen regardless of the horizontal/vertical placement of the cabinet.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: September 21, 2004
    Assignee: Funai Electric Co., Ltd.
    Inventor: Isaya Morishita
  • Patent number: 6604831
    Abstract: A portable image projector is provided with a vertically elongated tower configuration to substantially reduce its vertical footprint when it is placed on a horizontal support surface for use. A stabilizing foot is positioned below the housing portion of the projector and is horizontally pivotable between a retracted orientation in which the foot is disposed within the vertical footprint of the projector housing, and an extended orientation in which the foot projects outwardly beyond opposite sides of the projector housing. The stabilizing foot is pivotally secured to the bottom ends of a spaced pair of arcuate elevating leg members that extend upwardly through openings in the bottom side of the housing. The leg members are vertically movable through the housing openings between retracted and extended positions and are resiliently biased in a downward direction relative to the housing.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: August 12, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Phillip D. Prestigomo, Chadwick F. Smith, Jr.
  • Patent number: 6334687
    Abstract: The invention provides a projector that includes a stand type screen apparatus and an image projection device. The stand type screen apparatus includes a base table, a projecting device installing unit turnably mounted on the base table for detachably installing the image projecting device, a support leg turnably mounted on the base table and a screen holding unit holding the screen and turnably mounted on the support leg. With this arrangement, the size of a rear projection type projector is reduced, an installation space is decreased and portability is enhanced.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: January 1, 2002
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuya Chino, Kenji Tanikawa
  • Patent number: 5491585
    Abstract: A rear screen television cabinet, comprising a cabinet having front portions including a top, two sides and a front face, viewing surface on the front face, a mirror system comprising a plurality of mirrors for reflecting and successively enlarging and reflecting an incident beam onto the rear screen and a rear assembly which substantially closes said cabinet and is foldable or collapsible to render said cabinet portable, is disclosed. The cabinet's mirror system receives and successively enlarges and reflect an incident beam from a projector, to project a large image onto the viewing surface.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: February 13, 1996
    Assignee: Projectavision, Inc.
    Inventor: Eugene Dolgoff
  • Patent number: 4750832
    Abstract: A projector mounting frame is fitted in the space above the suspended ceiling of a room. A traveling frame vertically movable in the mounting frame has means for support of a projector thereon. Drive motor and screws drive the traveling frame vertically so the projector can be driven from a position concealed within the space above the ceiling to a position below the ceiling where it can project onto a wall or screen in the room. A trim frame is hung on the traveling frame under the projector and has ceiling pads or tiles on it matching the rest of the ceiling to neatly close the ceiling opening when the projector is concealed.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: June 14, 1988
    Assignee: McDaniel & Lloyd, Inc.
    Inventors: Kenneth A. Lloyd, Sr., Earl M. McDaniel, Franklin D. Smock
  • Patent number: 4673267
    Abstract: A video camera is provided with a longitudinally sliding part (5) which in the forward end position forms a protection for the lens (4) and in the rearward end position uncovers the lens. In addition, the eyepiece (9) of the viewfinder is extended to maximum magnification in the rear end position.
    Type: Grant
    Filed: June 3, 1986
    Date of Patent: June 16, 1987
    Assignee: Deutsche AG fur Unterhaltungselectronic OHG
    Inventor: Tomas Erxleben
  • Patent number: 4652100
    Abstract: An image acquisition system including at least two image projectors, a television camera and a modular desk for supporting the projectors and the camera wherein the image projectors are supported at predetermined locations on a tabletop supported for sliding and rotary movement so that the camera can receive projected images from a desired one of the image projectors by merely adjusting the angular position between the tabletop and a lower cabinet of the desk. The desk includes an upper cabinet having an image acquisition aperture formed therethrough and aligned with the desired one of the image projectors. The modular desk also includes a slab supported on the lower cabinet. In one embodiment of the invention a movable table supports the tabletop. In a second embodiment the tabletop is slidably and rotatably supported on a pair of spaced tracks mounted on the top surface of the slab.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: March 24, 1987
    Inventor: Seward J. Medbury
  • Patent number: 4556283
    Abstract: An automatic screen for projecting an image from a video projector onto it is disclosed. It has a cabinet 1 which accommodates a screen 2. The screen 2 can be moved relative to the cabinet by a chain 5a coupling a front door 1a of the cabinet 1 and a sprocket. The front door 1a of the cabinet 1 is opened in an interlocked relation to the operation of bringing the screen 2 to a set position projected from the cabinet 1. When the screen 2 is no longer used, it can be brought back into the cabinet 1, and in an interlocked relation to this motion the front door 1a of the cabinet 1 is closed.
    Type: Grant
    Filed: September 9, 1983
    Date of Patent: December 3, 1985
    Assignee: Sony Corporation
    Inventors: Kiyoshi Numata, Toshihiro Yoshida, Takashi Kokubo
  • Patent number: 4556913
    Abstract: A rear projection television receiver has an image source, first and second mirrors, and a screen. Light travels from the image source to the screen along a first light path via the first and second mirrors and along a second path that bypasses the mirrors. A light baffle assembly comprising a plurality of elongated baffle elements is located in both the first and second light paths. The angle of the individual baffle elements is adjusted so that light rays are unaffected along the first light path and substantially completely blocked along the second light path.
    Type: Grant
    Filed: January 13, 1984
    Date of Patent: December 3, 1985
    Assignee: RCA Corporation
    Inventors: Bertram VanBreemen, William L. Wilson, Duane L. Roberts, Tom W. Branton
  • Patent number: 4408835
    Abstract: A viewing system with automatic correction of the reading distance as a function of the inclination of the screen housing. In accordance with the invention, the viewing system comprises a screen housing axially suspended on a U shape base. The screen housing is adjustable by inclination on its axis of suspension. For each inclination two pins carried by the screen housing and sliding in two angled slots carried by the base carry out an automatic correction of the distance separating the operator from the front face of the screen housing.
    Type: Grant
    Filed: December 23, 1981
    Date of Patent: October 11, 1983
    Assignee: 501 Compagnie Internationale pour l'Informatique Cii-Honeywell Bull (Societe Anonyme)
    Inventors: Michel Deprez, Andre Fromion, Claude Hardouin, Jean C. Vilas Boas
  • Patent number: 4341446
    Abstract: The microfiche projector enlarges the image onto the flat white undersurface of the top panel of the enclosure which has a flat black interior. The viewer sees the image reflected in the adjustable mirror. The apparent image is about 50" in front of the user to reduce eye fatigue. The image is non-directional which allows considerable movement of the user.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: July 27, 1982
    Assignee: Realist, Inc.
    Inventor: Russell J. Burkel
  • Patent number: 4185899
    Abstract: A combination viewer and projector having a housing with a rear-lighted viewing screen mounted therein. The housing is adapted to receive a magazine having a length of film therein which can be advanced past an aperture in the magazine. A source of light is provided in the housing and is then directed into the magazine to form an image from the film in the aperture. Means is provided in the housing for receiving the image and for directing it onto a rear-lighted screen or alternatively through a projection opening in the housing.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: January 29, 1980
    Assignee: Action Films, Inc.
    Inventors: Hugh P. Sherlock, Edwin E. Ewry, Werner E. Sandvoss, Werner W. Ciupke, Glenn E. Brown, William T. Link
  • Patent number: 4183634
    Abstract: A rear projection viewer apparatus of the type wherein the projected images are initially projected downward towards a mirror mounted in the base of the viewer which redirects the projected images upwardly and forwardly to a viewing screen forming the front of the viewer. Means are provided for removing the mirror element from the downward path of the projected images and an auxiliary viewing screen smaller than the primary screen is disposed in the base of the viewer to receive the projected images thereupon thereby permitting viewing of the images on the smaller screen when the viewer is positioned with its primary viewing screen facing downward.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: January 15, 1980
    Assignee: Polaroid Corporation
    Inventor: Gerald H. Cook
  • Patent number: 4157214
    Abstract: A compact microimage viewing apparatus is disclosed which utilizes a low intensity light source with wide-angle projection optics to provide a clear and highly illuminated image to the viewer. To achieve compactness, the high brightness light-distributive screen of the viewing apparatus is located at an acute angle to the axis of projection of the projection lens. Keystone distortion of the projected image is substantially eliminated by employing a correcting lens, preferably a Fresnel lens, between the screen and the viewer at a predetermined angle to the screen such that the image portion projected onto the edge of the screen nearest to the projection lens, which would otherwise appear smaller to the viewer than would the image portion projected onto the farthermost edge of the screen, is magnified to an extent that a rectangular and substantially non-distorted image is presented to the viewer.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: June 5, 1979
    Assignee: Eastman Kodak Company
    Inventor: Stephen P. Hines
  • Patent number: 4147408
    Abstract: A back projection viewing screen comprising two parallel transparent sheets of plastic, each having its faces optically configured. The surfaces have the following characteristics arranged in the order from the projection side to the viewing side: (1) an ordinary circular Fresnel lens to which a light frosted texture has been applied; (2) a series of parallel vertical convex circular lenticulations joined by sharply defined cusps; (3) a series of parallel vertical convex lenticulations joined by sharp cusps and having an elliptical cross-section. The lenticulations on this third surface have a very different periodicity from that of the second surface to avoid the possibility of moire patterns; (4) the viewing surface of the screen is defined by a series of parallel horizontal convex lenticulations, each having a convex elliptical cross-section.
    Type: Grant
    Filed: December 23, 1976
    Date of Patent: April 3, 1979
    Assignee: Polaroid Corporation
    Inventor: William T. Plummer
  • Patent number: 4139283
    Abstract: A rear projection viewer apparatus of the type wherein a projected image is projected towards a primary viewing screen which when in its operative viewing position forms the front of the viewer, the front viewing screen being attached to other portions of the viewer housing so that it may be moved to an inoperative position. A second rear projection screen substantially smaller than the first screen is mounted within the viewer housing in a manner where it may be moved from an inoperative position where it does not interfere with projecting to the primary viewing screen to an operative position wherein the images may be projected upon the rear thereof. Means are provided for automatically moving the small auxiliary screen from its inoperative position to its operative position in response to manual displacement of the primary viewing screen from its operative position to its inoperative position.
    Type: Grant
    Filed: January 5, 1978
    Date of Patent: February 13, 1979
    Assignee: Polaroid Corporation
    Inventor: Gerald H. Cook
  • Patent number: 4136935
    Abstract: A rear projection viewer apparatus of the type wherein a projected image is projected towards a primary viewing screen forming the front of the viewer, the front viewing screen being removably located with respect to other portions of the viewer housing so that it may be removed from the path of the projected images. A second rear projection screen substantially smaller than the first screen is provided. The small screen and selected portions of the viewer housing are provided with complementary structure for selectively locating the second screen at an operative position substantially normal to the projection axis and at a location therealong substantially closer to the image projecting means than the first rear projection screen when it is in its operative position.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: January 30, 1979
    Assignee: Polaroid Corporation
    Inventors: Gerald H. Cook, William A. Holmes
  • Patent number: 4135784
    Abstract: A rear screen optic projection apparatus is provided having a multiple mirror reflection system mounted in a supporting enclosure and adapted for utilization with photographic projection equipment such as slide projectors and motion picture projectors. The reflector-type optic system of this apparatus includes three mirrors which are angularly displaced with respect to each other for providing a substantially long optical path from the projector to a viewing screen. The supporting structure is designed with a viewing screen and an entrance aperture for an image to be projected along the optical path. A plurality of the apparatus in a stored configuration by covering the viewing screen and closing the entrance aperture.
    Type: Grant
    Filed: August 10, 1977
    Date of Patent: January 23, 1979
    Inventor: Robert B. Larrick
  • Patent number: 4113366
    Abstract: A film projection system includes a collection of cartridges each containing a film program. The cartridges are stored in a storage magazine. A selector system permits a particular film program, which may be identified by a code, to be chosen and displaces the storage magazine so that the cartridge containing the selected film program is positioned at a transfer point in which it is adjacent a transfer mechanism. A transfer mechanism is adapted to remove the cartridge from the storage magazine and position the cartridge in a film reproduction unit. Upon positioning of the cartridge within the film reproduction unit, the film will be displaced within the cartridge and will be reproduced by the unit. Upon completion of the film program, the transfer mechanism removes the cartridge from the film reproduction unit and returns the cartridge to the storage magazine.
    Type: Grant
    Filed: December 29, 1976
    Date of Patent: September 12, 1978
    Inventor: Ernest Glover
  • Patent number: 4097132
    Abstract: A motion picture projector is provided with a manually shiftable mode controller assembly for selecting various operational modes and apparatus for the automatic threading and rewinding of film. The operative mechanical components of the projector are mounted on a unitarily molded housing including molded structures and portions that independently and cooperatively with other control assemblies and interfitting structures provide features and improved operational characteristics. The molded housing interfits with a take-up reel cover, a control assembly cover and a rear cover that rotatably engages a carrying handle. Structure to define a film path, an automatic threading assist structure, a film speed detent structure and a position defining structure for the mode controller assembly are also provided by and integrally molded with the housing.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: June 27, 1978
    Assignee: Bell & Howell Company
    Inventors: Raymond W. H. Kim, Robert A. Klein, Edward H. Lodge, Arthur L. Lueders, James G. Woodier
  • Patent number: 4093363
    Abstract: A motion picture projector having a housing or casing having one narrow side and one wide side, substantially perpendicular to each other. The film spools are arranged on the wide side. In a first projection position, the housing is arranged upright, resting on its narrow side, with the wide side approximately vertical. To enable projection to take place also when the projector is laid on a wide side, rather than standing upright, a first mirror is swung into position across the beam of projected light rays, and projects the rays upwardly to a second mirror arranged at an opening in the wide side of the housing. A control knob moves both mirrors simultaneously to effective projecting position, and also serves to adjust the exact inclination of the second mirror so as to vary the height of the projected image on the viewing screen at some distance from the projector.
    Type: Grant
    Filed: September 30, 1976
    Date of Patent: June 6, 1978
    Assignee: Rollei-Werke Franke & Heidecke
    Inventor: Claus Prochnow
  • Patent number: 4003644
    Abstract: A projector and/or viewer (monitor) for motion-picture films continuously unwinding and winding on a spool within a magazine, characterized by comprising: a casing or case having a translucent wall operating as a screen and on another wall an opening for inserting and removing the magazine; a frame internally of said case defining a housing which at one end thereof communicates with the opening in said case and intended for the passage of the magazine, while another end thereof has a slit or opening for exposing the frames of the film moving in front of it and an optical projection system, said frame carrying: a light source mounted sidewise of the magazine housing for illuminating through a reflecting means the film frames; an electrical motor controlling a rotating shutter disc, having on one face a U-shaped cam for operating the claw for drawing the film in front of the exposition slit or opening, and by means of mechanical drives also controlling the pin of the film spool contained in the magazine and fan
    Type: Grant
    Filed: January 23, 1974
    Date of Patent: January 18, 1977
    Assignee: Lamy S.r.l.
    Inventor: Angela Aruanno
  • Patent number: 3997253
    Abstract: Display apparatus for viewing a film strip which includes a cartridge having two separate reels for holding film strip for and after it passes a projection mechanism. The projection mechanism includes a light source and two prisms and a screen for viewing.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: December 14, 1976
    Assignee: Lawrence Peska Associates, Inc.
    Inventor: Henri M. Payot
  • Patent number: 3951518
    Abstract: A box-shaped projection screen unit is attachable to an optical projector to constitute a cover therefor. The screen unit comprises a translucent screen mounted in an opening formed through the side of the box opposite an open side of the box which mates with the projector. A rectangular plate hinged to a vertical edge of the box has an internal reflecting surface facing the screen, and is swingable from a storage position covering the screen outward to a projection position in which the plate forms an angle with the screen. A triangular cover plate is hinged to the top edge of the box, and is swingable from a storage position between the rectangular plate and the screen outward to a horizontal position in which another edge of the triangular plate engages with the rectangular plate to hold the same in the projection position and prevent incident light from above from reaching the screen.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: April 20, 1976
    Assignee: Ricoh Co., Ltd.
    Inventors: Kazuki Kobayashi, Kikuo Takita