Patents Examined by William Dowling
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Patent number: 6309071Abstract: A projection display system comprises a light source that generates non-polarized light having at least two polarization states and having a first color component, a second color component, and a third color component. At least one color selection device selectively transmits at different times one of the second and third color components. The system has at least four polarized light modulators, two of the light modulators each generating a respective image associated with each respective polarization state of the first color component, and two of the light modulators each generating a respective image associated with a respective polarization state of one of the second and third color components transmitted by the color selection device. The system also has a projection lens for projecting the images from the polarized light modulators. Alternative projection display systems are disclosed, together with a method for projecting color images.Type: GrantFiled: August 4, 1999Date of Patent: October 30, 2001Assignee: Sharp Laboratories of America, Inc.Inventors: Austin L. Huang, James M. Florence
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Patent number: 6309074Abstract: A method of transparency viewing, including: placing a transparency at a viewing surface, forming a light pattern and projecting the light pattern to back-illuminate the transparency. Preferably, the light pattern is formed by spatially modulating a beam of light using a plurality of light valves.Type: GrantFiled: December 17, 1997Date of Patent: October 30, 2001Assignee: SmartLight Ltd.Inventors: Dan Inbar, Eran Shaffir
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Patent number: 6309073Abstract: A projection-type display apparatus includes a light source, a uniform illumination optical system, a color separating system for separating a white light beam emitted from the uniform illumination optical system into three color beams, three liquid crystal panels for respectively modulating each of the separated color beams, a light guide system located on an optical path of the color beam having the longest optical path among the separated color beams, a dichroic prism for synthesizing the beams modulated through the liquid crystal panels, and a projection lens for projecting the synthesized and modulated beam onto a screen. The uniform illumination optical system is provided with a uniform illumination optical device for converting the white light beam emitted from the light source into a uniform beam.Type: GrantFiled: March 16, 2000Date of Patent: October 30, 2001Assignee: Seiko Epson CorporationInventors: Tadaaki Nakayama, Yoshitaka Itoh, Akitaka Yajima
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Patent number: 6305806Abstract: A rear-type projection display device is provided, in which even a liquid crystal panel having several point defects is used, the point defects are hardly recognized. According to the present invention, in order not to display the display defects (the bright spots or unlit defects) that take place when a light from a light source transmits a liquid crystal panel having the point defects, means for correcting the display defects is provided on the liquid crystal panel side of a screen.Type: GrantFiled: May 10, 2000Date of Patent: October 23, 2001Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Yoshiharu Hirakata
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Patent number: 6302543Abstract: A projector, which has a main body and a plurality of feet protruding from the main body to support the main body, includes a first adjuster that adjusts stepwise the amount of protrusion of at least one of the plurality of feet, and a second adjuster that infinitely and finely adjusts the amount of protrusion of at least one of the plurality of feet. The position of a projection image of the projector can be easily and speedily adjusted by coarsely adjusting the amount of protrusion of the foot by the first adjuster, and then making fine adjustment by the second adjuster.Type: GrantFiled: June 15, 1998Date of Patent: October 16, 2001Assignee: Seiko Epson CorporationInventors: Jun Arai, Shogo Kurosawa, Motoyuki Fujimori, Akitoshi Kuroda, Shinji Haba, Kiyoshi Miyashita
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Patent number: 6302542Abstract: This invention relates generally to improved approaches for displaying volumetric three-dimensional (3D) images. The basic idea features improved optical-mechanical mechanisms enabling creation of volumetric 3D images by successive projection of whole frames of 2D images, through an optical-mechanical image delivery system, onto a display plane that moves periodically and sweeps a space. In the rotating approach, two image delivery mechanisms can be used: a revolving multi-mirror system and a revolving orthogonal switchable reflector system. In the reciprocating approach, the image delivery mechanisms include a reciprocating reflector system and a zooming optics.Type: GrantFiled: February 20, 1999Date of Patent: October 16, 2001Inventor: Che-Chih Tsao
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Patent number: 6302544Abstract: In an image projection system, light emitted by a point source is reflected off the concave surface of a reflector to a fly-eye-lens system where the incident light is distributed to uniformly irradiate multiple optical elements. Each optical element splits incident light into a first polarized component and a second orthogonally polarized component parallel to the first component and converting the second component to polarization identical to the first component. Light from the enhancer is imagewise-modulated by an image formed in a display panel and projected onto a screen. The reflector is configured so that any point on the reflector is defined by an equation containing a term of parabola and at least one term of a series of aspheric coefficients of order of even number which is equal to or greater than two.Type: GrantFiled: March 10, 2000Date of Patent: October 16, 2001Assignee: NEC Viewtechnology, Ltd.Inventor: Tadashi Takeuchi
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Patent number: 6299312Abstract: A reflection type projector in which the brightness of light projected onto a screen increases by simultaneously overlapping three colors used for representation of a color image. The reflection type projector includes a light source, first and second dichromatic mirrors arranged on an optical path for transmitting and reflecting input light according to the wavelength thereof, first, second and third image forming devices for generating an image corresponding to each color from input light, a first prism arranged on an optical path between the first dichromatic mirror and the first image forming device, a second prism arranged on an optical path between the second dichromatic mirror and the second image forming device, and a third prism arranged on an optical path between the second dichromatic mirror and the third image forming device.Type: GrantFiled: February 29, 2000Date of Patent: October 9, 2001Assignee: Samsung Electronics Co., Ltd.Inventors: Soon-cheol Choi, Han-il Ko
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Patent number: 6296360Abstract: A stereo slide mount capable of adjusting perspective feeling of a stereo image into an optimum state, comprising a base frame 3 having a guide groove formed running in the lateral direction, two film holders 2 fitted in the guide groove, and a cover frame 1. Films are mounted on the two film holders 2 on the base frame 3, and the stereo slide mount is mounted on a stereo slide viewer equipped with a cam mechanism for adjusting the gap between the film holders. The pitch between the films is adjusted to obtain an optimum perspective feeling while observing a stereo image, and the cover frame is mounted after the adjustment.Type: GrantFiled: October 5, 1999Date of Patent: October 2, 2001Inventor: Minoru Inaba
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Patent number: 6290360Abstract: A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.Type: GrantFiled: November 19, 1998Date of Patent: September 18, 2001Assignees: Hitachi, Ltd., Hitachi Video and Information System, Inc.Inventors: Nobuhiko Konuma, Hidetomo Yoshimura, Seiichi Sekiguchi, Mikiharu Kuwata, Masaharu Deguchi, Takashi Kakuda, Yutaka Matsuda, Takuya Shiaki, Futoshi Yamasaki, Atsushi Ishibashi, Koichi Umezawa, Takeshi Hoshino, Shigehisa Hagura, Makoto Fukatsu, Nobuyuki Kaku, Kenji Fuse, Satoshi Ohuchi, Tomohiro Miyoshi, Naohiro Ozawa, Masahiko Yatsu, Yasuo Otsuka, Takesuke Maruyama
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Patent number: 6290359Abstract: An apparatus and method for forming images visible to performers and to audiences includes a system for forming virtual images and creating visual effects in a stage setting. This system may include a stage and first and second flat panel video displays. The first flat panel video display is visible to the audience through a portal mirror. The second flat panel video display is not visible to the audience; however, images displayed thereon are reflected off of the portal mirror and outwardly to the audience. Finally, a performance area between the back display and the portal mirror is provided for a person or object whereby the audience may see the composite image of the images from the first and second flat panel video displays and the person or object in the performance area on-stage. Alternatively, images on a flat panel video display may be reflected off of a portal mirror so that they are visible in the performance area to a person there.Type: GrantFiled: March 31, 2000Date of Patent: September 18, 2001Assignee: The Potomac Company, L.L.C.Inventor: Gregory B. Shriver
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Patent number: 6290358Abstract: A polarized-light converting elemental device which can produce an accurately unidirectionally and circularly polarized light with a minimized loss of light and a projection-type display device using said unidirectionally-polarized-light converting elemental device are provided. A polarized-light converting elemental device comprises a mirror glass portion consisting of an array of mirror glass blocks each having a first reflecting optical element and a second reflecting optical element and a cholesteric-liquid-crystal glass portion including a cholesteric liquid crystal layer for reflecting either clockwise circularly polarized component or anticlockwise circularly polarized component and transmitting the other.Type: GrantFiled: January 11, 2000Date of Patent: September 18, 2001Assignee: Sharp Kabushiki KaishaInventors: Yoshiharu Sakai, Kazuhiro Inoko
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Patent number: 6286962Abstract: An optical projection system is disclosed. The optical projection system comprises a projection screen and a plurality of viewing stations. Each viewing station includes a beamsplitter, a projector including a lens, wherein the projector is directed at the beamsplitter, and a mechanical apparatus. The mechanical apparatus is adapted to optimize a quality of an image on the projection screen as seen by an observer looking at the beamsplitter. Projectors at different viewing stations are capable of projecting different images onto the projection screen.Type: GrantFiled: December 22, 1999Date of Patent: September 11, 2001Assignee: Thomas Hennes, Inc.Inventors: Thomas Hennes, Jennifer Whitburn
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Patent number: 6283599Abstract: A projection display device includes a lens module, a light source and an adjusting device. The lens module has a first lens and a second lens. The light source emits light through the first lens and the second lens to a surface. The adjusting device is used to change the distance between the first lens and the second lens, thereby adjusting brightness and uniformity of the projected pictures on the surface.Type: GrantFiled: February 22, 2000Date of Patent: September 4, 2001Assignee: Acer Peripherals, Inc.Inventor: Rung-De Lin
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Patent number: 6280037Abstract: A projection system includes display panels, optics and an adjustment device. Each display panel is adapted to modulate a different beam of light to form an associated modulated beam of light. The optics are adapted to form an associated image of each modulated beam of light, and the adjustment device is adapted to position one of the display panels to adjust convergence of the images.Type: GrantFiled: February 26, 1999Date of Patent: August 28, 2001Assignee: Intel CorporationInventor: Ronald D. Smith
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Patent number: 6280034Abstract: An imaging system, comprising a broadband unpolarized white light source (81), a polarization converter system for converting polarization axes of unpolarized white light into a substantially single polarization axis, to produce a beam of polarized light, a selective polarization filter (82), adapted to selectively rotate a polarization axis of a selected spectral band of light of the with respect to remaining polarized light based on a control signal (119), a polarized beam splitter (84), for separating light having a the substantially single polarization axis from light having a rotated polarization axis, a pair of electro-optic spatial light modulators (86, 89), disposed along a path of light within the spectral band and a path of remaining light outside the spectral band, respectively, and being adapted to modulate an image therein, and a polarized beam splitter (88), for recombining modulated light from the pair of light modulators.Type: GrantFiled: July 30, 1999Date of Patent: August 28, 2001Assignee: Philips Electronics North America CorporationInventor: Matthew S. Brennesholtz
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Patent number: 6280039Abstract: A script prompter for attachment to a lens of a camera comprises a two-way mirror having a front surface and a rear surface. A hood is mounted on the rear surface of the mirror and defines with the rear surface a chamber through which light can pass to and from the lens of the camera. A connecting member on the hood connects the script prompt device to the lens of the camera. The script prompter includes a script tray member which is attached to the mirror. The script tray is movable relative to the mirror between an open position where the script tray member is angled with respect to the mirror and a closed position where the script tray member and mirror lie adjacent to each other. In this way, text located on or in the script tray member is reflected in the mirror so as to be visible to a person viewed through the lens.Type: GrantFiled: September 24, 1999Date of Patent: August 28, 2001Inventor: Edward N. Barber
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Patent number: 6276801Abstract: A projecting display system includes a light source (101) which produces light which is spatially modulated by a number of spatial light modulators (105, 107). A splitting means (103) is provided in the light path between the light source (101) and the spatial light modulators (105 and 107) such that the overall luminous flux produceable by the system is not determined by the maximum luminous flux which each spatial light modultors (105, 107) can accommodate.Type: GrantFiled: April 28, 1997Date of Patent: August 21, 2001Assignee: Digital Projection LimitedInventor: Raymond G. Fielding
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Patent number: 6276803Abstract: A first prism array (34) formed on a prism array plate (32) is arranged so as to confront a second prism array (37) formed on a prism array plate (35). When a light ray (r) that is parallel to an optical axis is transmitted through the first prism array, the light ray r enters into the second prism array (37) while refracted. The light ray that has been refracted by the second prism array (37) becomes an original light ray (r) that is parallel to the optical axis. Therefore, the light ray (r) that has passed through an optical path converting optical element (31) becomes a light ray (r) that is shifted in a direction perpendicular to the optical axis. As a result, the light is split and shuffled by the first prism array (34), so that a luminous intensity distribution thereof is uniformed.Type: GrantFiled: May 14, 1997Date of Patent: August 21, 2001Assignee: Omron CorporationInventors: Shigeru Aoyama, Masayuki Shinohara, Tsukasa Yamashita, Hiroshi Kitajima
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Patent number: RE37352Abstract: A projection optical apparatus for projection an image of an object onto a workpiece, which is suitable for use, for example, as an exposure apparatus used in the manufacture of integrated circuits. The projection optical apparatus includes an image forming optical system whose optical characteristic is changed by the light energy supplied from the illuminated object. A change of the optical characteristic of the optical system is determined by the use of a predetermined parameter whereby when the distribution of the light energy on the pupil of the optical system is changed, the parameter is correct in such a manner that the change of the optical characteristic determined by the parameter is changed in correspondence to the change in the distribution of the light energy.Type: GrantFiled: July 25, 1996Date of Patent: September 4, 2001Assignee: Nikon CorporationInventors: Kazuaki Suzuki, Yukio Kakizaki, Tetsuo Taniguchi