Reflector Between Lamp And Screen Patents (Class 353/77)
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Publication number: 20110205500Abstract: 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: ApplicationFiled: May 3, 2011Publication date: August 25, 2011Applicant: Toshiba Tec Kabushiki KaishaInventors: Yoshihiko Ikeda, Hiroki Mochizuki, Masanori Takeuchi, Makoto Nozawa, Yun Wang
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Patent number: 8004760Abstract: 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: GrantFiled: October 28, 2009Date of Patent: August 23, 2011Assignee: Microsoft CorporationInventors: Zhiqiang Liu, Prafulla Masalkar, Karlton Powell
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Publication number: 20110188007Abstract: 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: ApplicationFiled: January 31, 2011Publication date: August 4, 2011Inventors: Kenichiro Okura, Haruhiko Matoba
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Patent number: 7972015Abstract: 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: GrantFiled: May 28, 2008Date of Patent: July 5, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-soo Lee, Kee-uk Jeon, Sang-ik Kim, Jae-geun Lim, Jung-hyeon Kim
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Patent number: 7972004Abstract: 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: GrantFiled: April 18, 2008Date of Patent: July 5, 2011Assignee: Texas Instruments IncorporatedInventors: Terry Alan Bartlett, Paul L. Rancuret
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Patent number: 7972011Abstract: 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: GrantFiled: March 12, 2007Date of Patent: July 5, 2011Assignee: Panasonic CorporationInventors: Akira Kurozuka, Hironori Tomita
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Patent number: 7967448Abstract: A micro-mirror based projection display system in an enclosure with minimum chin and depth measurements is disclosed. A light source, such as a solid state laser light source, generates light of multiple primary colors that is modulated by a digital micro-mirror device. The projection optics of the system include a telecentric rear group of glass lenses with spherical surfaces, followed by a pair of aspheric lenses formed of plastic. A folding mirror, such as a single-piece or multi-piece angular mirror, is disposed between the aspheric lenses, to reduce the depth of the enclosure, and an aspheric mirror projects the image onto a TIR Fresnel projection screen. The aspheric lenses are magnifying to reduce the magnification required of the aspheric mirror, and the aspheric lenses and mirror are clipped to reduce enclosure volume. A folding mirror may be used after the aspheric mirror to further reduce the depth of the enclosure.Type: GrantFiled: December 18, 2007Date of Patent: June 28, 2011Assignee: Texas Instruments IncorporatedInventor: Patrick Rene Destain
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Patent number: 7959305Abstract: A digital micromirror projection display system is disclosed in which “off” pixel light is recaptured and recycled. In the disclosed system, a digital micromirror device directs incident light for “on” pixels in the image to be displayed through projection lenses to a projection screen. The digital micromirror device directs incident light for “off” pixels back toward the light source for recapture by a light integrator. Both the incident and projected light can pass through a rear group of projection lenses, with the first projection lens being disposed near the digital micromirror device. A mirror directs the incident light toward the digital micromirror device, and the “off” pixel light from the digital micromirror device toward the light integrator. As a result, “off” pixel light can be recycled without degrading image contrast, in a manner that can place fast projection lenses close to the digital micromirror device to save cost.Type: GrantFiled: August 30, 2007Date of Patent: June 14, 2011Assignee: Texas Instruments IncorporatedInventor: Patrick R. Destain
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Patent number: 7946717Abstract: 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 has a Petzval sum with a sign opposite to a sign of a Petzval sum of the second optical system.Type: GrantFiled: September 13, 2007Date of Patent: May 24, 2011Assignee: Ricoh Company, Ltd.Inventors: Issei Abe, Kazuhiro Fujita, Atsushi Takaura
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Patent number: 7946713Abstract: A display apparatus, comprises a filter unit 33 attached on an air inlet opening 28a, having such a filter 36 that a suction negative load generating at the air inlet opening 28a formed in an upper cabinet 3 comes to be smaller than the suction load generating at gaps 29a and 30a defined in the upper cabinet 3, when driving a cooling unit 18, for sucking an air from the upper cabinet 3 and discharging the air used for cooling into the upper cabinet 3, when cooling down optical parts, such as, display devices 15R, etc., and a polarizing plate 16R, etc., of an optic unit 9.Type: GrantFiled: March 15, 2007Date of Patent: May 24, 2011Assignee: Hitachi, Ltd.Inventors: Yuji Kishi, Nobuyuki Kaku
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Patent number: 7922341Abstract: 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: GrantFiled: October 20, 2009Date of Patent: April 12, 2011Assignee: Ricoh Company, Ltd.Inventors: Atsushi Takaura, Kazuhiro Fujita, Nobuo Sakuma
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Patent number: 7914160Abstract: A projection television includes: a mirror holder made up of a metal bracket fixed with its one end attached to a cabinet and a mirror holder cover made of synthetic resin having a square-cornered U shape part into which the other end of the bracket is fitted; and a mirror having an edge supported by the mirror holder and changing the optical path of projected light.Type: GrantFiled: July 24, 2007Date of Patent: March 29, 2011Assignee: Mitsubishi Electric CorporationInventor: Norichika Sugano
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Patent number: 7914153Abstract: A projection type image display apparatus includes a lens group, being disposed adjacent to an image display element, which is configured to include a plural number of lenses, and a mirror, which is configured to reflect emission lights from the lens group, so as to project upon the screen obliquely. A ratio (Lo/Lp) between a distance (Lp) from a center of the mirror up to the screen and a diagonal size (Lo) of the screen is at least 2.Type: GrantFiled: June 29, 2010Date of Patent: March 29, 2011Assignee: Hitachi, Ltd.Inventors: Koji Hirata, Takanori Hisada, Masahiko Yatsu
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Patent number: 7909471Abstract: A rear projection type display apparatus, comprises an output unit that modulates a light from a light source to output a projection light; an image formation unit that has one or more optical elements, and that subjects the projection light that is output from the output unit to form an image; a Fresnel screen that displays the projection light that is subjected to form an image; a light detection unit that is disposed at a position on which a reflected light from the Fresnel screen focuses, and that detects rays; and a control unit that controls an output of the projection light by the output unit based on the rays that are detected at the light detection unit.Type: GrantFiled: May 4, 2007Date of Patent: March 22, 2011Assignee: Canon Kabushiki KaishaInventor: Minoru Noji
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Patent number: 7911411Abstract: A projection apparatus for inexpensively adjusting the irradiating region of light on an image forming device to irradiate the light to the entire image forming surface of the image forming device is provided. The projector including a light tunnel for passing the light emitted from a lamp and changing the light to condensed uniform light, a mirror for reflecting the light passed through the light tunnel, a DMD for reflecting the light at an image forming surface irradiated with the light reflected by the mirror and forming an image, a lens for projecting the image formed with the DMD, and a frame for attaching these components of an image projection optical system; further includes a rotation adjustment fixing mechanism for fixing the light tunnel to the frame with the rotation angle having the axis of the light tunnel as substantially the center adjusted with an incident port of light of the light tunnel facing the lamp and an exit port facing the mirror.Type: GrantFiled: March 12, 2007Date of Patent: March 22, 2011Assignee: Funai Electric Co., Ltd.Inventors: Tsutomu Yoshikawa, Yusuke Ohta
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Patent number: 7896504Abstract: A projection module intended to project an image on a screen defining a specified projection plane is disclosed. The module includes an objective, for emitting an imaging beam; a curved mirror; and at least two deflection surfaces for deflecting the imaging beam, the deflection surfaces being placed in the path of the imaging beam between the objective and the curved mirror.Type: GrantFiled: March 30, 2005Date of Patent: March 1, 2011Assignee: Thomson LicensingInventors: Jean-Jacques Sacre, Pascal Benoit
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Patent number: 7896507Abstract: In a projection type display apparatus for enabling to display an image, by projecting an image on an image display element(s), enlargedly, upon a nearly horizontal surface, such as, a table, a reflection mirror for reflecting a light from a light source is so disposed that an optical axis of the light source is nearly perpendicular to an optical axis of a lens group having a plural number of lens elements, which are disposed symmetric with respect to the optical axis.Type: GrantFiled: January 31, 2008Date of Patent: March 1, 2011Assignee: Hitachi, Ltd.Inventors: Koji Hirata, Masahiko Yatsu, Takanori Hisada
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Patent number: 7891817Abstract: A projection display apparatus that projects an image on a screen includes at least three light sources that emit light beams of different wavelengths, at least three optical units that convert the light beams emitted from the at least three light sources into substantially collimated light beams, a beam-combining unit that combines the light beams received at different angles from the at least three optical units into a single beam of light, and a scanning unit that scans the beam emitted from the beam-combining unit so as to allow the beam to enter the screen.Type: GrantFiled: July 20, 2007Date of Patent: February 22, 2011Assignee: Sony CorporationInventor: Masanori Iwasaki
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Patent number: 7878664Abstract: A projector includes a projecting module for projecting a projecting image on a screen panel, an image sensor for capturing an image of an object which is located outside of the projecting module and faces toward the lens module, a light director, and a controlling unit. The projecting module has a lens module and a light source for emitting light transmitting through the lens module. The light director is movable between a first position where the light director is located outside of a light path associated with the lens module, and a second position where the light director is configured for directing light of the object through the lens module to be incident on the image sensor. The controlling unit controls the light director to move between the first and second positions.Type: GrantFiled: December 10, 2007Date of Patent: February 1, 2011Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Ming-Shan Chan, Sheng-An Wang
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Patent number: 7862180Abstract: The invention provides an optical system for image projection, wherein when used in an image projection apparatus, a screen-continuing portion (e.g., screen-underlying portion) of the apparatus can be reduced to a small size, or can be removed, and thereby the apparatus can be so compacted, and provides an image projection apparatus mounting such optical system. An optical system 10 for image projection including a lighting optical system 1 leading light from a light source 11 for lighting a display element 4 (or 4?), and a projecting optical system 3 for projecting projection light containing image information from the display element 4 (or 4?). The lighting optical system 1 is arranged such that a straight optical axis ? from the light source 11 in the lighting optical system 1 is positioned in an area deviated from a luminous flux ? of the projection light incident into the projecting optical system 3 toward an area where the projection light ? from the projecting optical system 3 passes.Type: GrantFiled: November 11, 2005Date of Patent: January 4, 2011Assignee: Konica Minolta Opto, Inc.Inventors: Kohtaro Hayashi, Shigeru Sawamura
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Publication number: 20100328622Abstract: A projection image display apparatus is provided which is capable of preventing misregistration in an on-screen image. A main frame assembly holds together an optical engine that modulates light emitted from a light source and a screen on which light emitted from the optical engine is projected, and the main frame assembly is configured to be supported by a bottom frame formed by a separate structure, whereby distortion having occurred at the bottom frame is caused not to transmit to the main frame assembly.Type: ApplicationFiled: March 26, 2010Publication date: December 30, 2010Inventors: Norihiro WATANABE, Satoru Okagaki, Atsushi Michimori, Norichika Sugano, Kazuo Kadowaki, Tomomi Matsui
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Patent number: 7857462Abstract: A projection optical unit for a projection display apparatus, which displays an image upon a projection surface, obliquely, includes a front lens group disposed in a direction from an image display element to a projection surface, a rear lens group, and a reflection mirror formed so that a curvature of a portion for reflecting a light beam incident upon a lower end portion of the projection surface is larger than a curvature of a portion for reflecting a light beam incident upon an upper end of the projection surface. An optical axis of the front lens group and the rear lens group is more inclined with respect to a direction of the portion of the reflection mirror for reflecting the light beam incident upon the lower end portion of the projection surface than a normal line direction of the image display element.Type: GrantFiled: July 19, 2010Date of Patent: December 28, 2010Assignee: Hitachi, Ltd.Inventors: Takanori Hisada, Koji Hirata, Masahiko Yatsu
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Patent number: 7857463Abstract: A micro-mirror based projection display system in an enclosure with minimum chin and depth measurements is disclosed. A solid-state laser light source generates light of multiple primary colors that is modulated by a digital micro-mirror device. The projection optics of the system include a telecentric rear group of glass lenses with spherical surfaces, followed by a pair of aspheric lenses formed of plastic. A folding mirror is disposed between the aspheric lenses, to reduce the depth of the enclosure, and an aspheric mirror projects the image onto a TIR Fresnel projection screen. The aspheric lenses are magnifying, to reduce the magnification required of the aspheric mirror, and the aspheric lenses and mirror are clipped to reduce enclosure volume.Type: GrantFiled: March 29, 2007Date of Patent: December 28, 2010Assignee: Texas Instruments IncorporatedInventor: Patrick R. Destain
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Patent number: 7850313Abstract: A projection type image display apparatus includes an image display element, a first lens group disposed in a light direction with respect to the image display element and configured to include a plurality of lenses, a second lens group disposed in a light direction with respect to the first lens group and configured to include a plurality of lenses, a reflection mirror, configured to reflect lights emitted from the first and/or second lens groups so as to project upon the screen obliquely, a first mounting base on which the first lens group is mounted, a second mounting base on which the second lens group is mounted, and a chassis configured to store the first and second lens groups, the reflection mirror, and the first and second mounting bases. The first mounting base is fixed at a bottom of the chassis, while the second mounting base is moveable.Type: GrantFiled: June 29, 2010Date of Patent: December 14, 2010Assignee: Hitachi, Ltd.Inventors: Koji Hirata, Takanori Hisada, Masahiko Yatsu
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Patent number: 7841728Abstract: An image display apparatus 100 that displays an image using a light modulated according to an image signal includes a projection optical system 90 that includes a projection lens 20, a first mirror 30 that reflects a light from the projection lens 20, and a second mirror 40 that widens an angle of a light from the first mirror 30 by reflecting the light, and projects the light modulated according to the image signal from an optical engine unit 10; a third mirror 50 that reflects a light from the projection optical system 90; and a screen 50 that transmits a light from the third mirror 50. The projection lens 20 and the second mirror 40 are arranged in such a manner that an optical axis of the projection lens 20 substantially matches an optical axis of the second mirror 40, and shift the light from the optical engine unit 10 to a specific side from the optical axis of the projection lens 20.Type: GrantFiled: October 19, 2006Date of Patent: November 30, 2010Assignee: Seiko Epson CorporationInventors: Eiji Morikuni, Masatoshi Yonekubo, Toshihiko Sakai, Shunji Kamijima
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Patent number: 7830599Abstract: A projection-type display apparatus and a display method thereof are disclosed, the projection-type display apparatus including a coated portion which is formed on a surface of a substrate, and which scans a video onto a screen, and a patterned portion which is formed on another surface of the substrate in a serrated pattern, wherein the serrated pattern is formed on the substrate according to the surface area of the patterned portion and the depth of the serrated pattern. A serrated pattern is formed on a substrate forming a reflective portion to reflect a video on a screen, so the cooling surface area of the substrate is increased, thereby compensating for distortions in video scanned onto the screen.Type: GrantFiled: June 30, 2008Date of Patent: November 9, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jong-soo Lee, Kee-uk Jeon, Kwan-heung Kim, Jung-hyeon Kim
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Patent number: 7798655Abstract: A projection unit 17 effectively corrects out of focus due to a temperature rise. A mirror holding mechanism of a concave mirror 25 has a mirror holder 41 and a mirror holder base 42. The concave mirror 25 is slidably housed in the mirror holder 41. A focus correction member 57, which expands by heat, is disposed between a back face of the concave mirror 25 and reference plane S formed in the mirror holder. The concave mirror 25 and the focus correction element 57 are urged to the reference plane S by a mirror retainer spring 59.Type: GrantFiled: June 27, 2007Date of Patent: September 21, 2010Assignee: Konica Minolta Opto, Inc.Inventors: Atsushi Matsuura, Shinichi Suzuki
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Patent number: 7789516Abstract: A thin projection type image display device with a low chin height includes a cabinet, a screen, a projection optical system, an optical path changing unit, and a reflecting unit. The screen is disposed on a front side of the cabinet. The projection optical system enlarges and projects an image formed by a display element, and the optical path changing unit is disposed on the bottom of the cabinet to reflect the image enlarged and projected by the projection optical system. The reflection unit is disposed obliquely to the screen and below the screen to reflect the image reflected by the optical path changing unit toward the screen. The projection optical system is disposed in a space above a horizontal plane perpendicular to the screen, behind the front side of the cabinet, and below an optical path of light incident on a bottom of the screen.Type: GrantFiled: September 26, 2006Date of Patent: September 7, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Young-chol Lee, Kun-Ho Cho, Jong-soo Lee, Jae-hyun Park
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Patent number: 7784950Abstract: An image projecting apparatus has an integrator for generating plural secondary-light-source images for generating illumination light with a uniform intensity; and a variable stop mechanism arranged at or near a position conjugate with the secondary-light-source images. The variable stop mechanism has a base plate having a fixed aperture; and a stop blade which moves across the aperture for changing a quantity of light. The change in the quantity of light passing through said variable stop caused by the movement of said stop blade is greater than a change in a size of an effective region of a stop aperture.Type: GrantFiled: September 7, 2006Date of Patent: August 31, 2010Assignee: Konica Minolta Opto, Inc.Inventor: Yasumasa Sawai
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Patent number: 7780296Abstract: A projection optical unit for obliquely projecting an image displayed on an image display element upon a projection surface, enlargedly, comprises: a lens group, being disposed neighboring to the image display element, and including a plural number of projection lenses therein; and a reflection mirror for reflecting lights emitting from the lens group, to be projected onto the projection surface, obliquely, wherein assuming that a light beam, emitting from a center of the display screen of the image display element, passing through a center of an entrance pupil of the lens group, and entering into a screen center on the projection surface, is a screen center light beam, then the screen center light beam is incident upon the projection surface, obliquely, with respect to a normal line thereon, the lens group comprises a front lens group including a plural number of refraction lenses, being disposed thereafter directing from the image display element to the projection surface and having rotationally symmetric sType: GrantFiled: June 25, 2008Date of Patent: August 24, 2010Assignee: Hitachi, Ltd.Inventors: Takanori Hisada, Koji Hirata, Masahiko Yatsu
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Patent number: 7777949Abstract: A rear projection display device is provided. In an embodiment, the display device includes a laminate screen including a microstructure lamina having a non-planar input surface, a substantially planar output surface and a first index of refraction. The laminate screen further may include a diffusion screen lamina having a substantially planar input surface, an output surface and a second index of refraction. The diffusion screen lamina may be in optical communication with the microstructure lamina. Moreover, the planar output surface of the microstructure lamina and the planar input surface of the diffusion screen lamina may be in facing relationship.Type: GrantFiled: August 7, 2006Date of Patent: August 17, 2010Assignee: Seiko Epson CorporationInventors: Mark David Peterson, Jeffrey Alan Gohman
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Patent number: 7766488Abstract: A projection-type image display apparatus for projecting an image, enlargedly, onto a projection surface, comprises: an image display element; a lens group, being disposed behind the image display element, comprising therein, a front lens group made up with a plural number of lenses, including, at least, a refractive lens, having a positive power and being rotationally symmetric in a surface configuration thereof, and a rear lens group made up with a plural number of lenses, including, at least, a lens having a free curved surface configuration and being rotationally asymmetric, thereby emitting the image displayed on the image display element; a reflection mirror for reflecting the light from the lens group, thereby projection onto the projection surface, obliquely; a first mounting base, on which the rear lens group is mounted; and a rod member, which is provided on the mounting base for moving the mounting base.Type: GrantFiled: June 15, 2007Date of Patent: August 3, 2010Assignee: Hitachi, Ltd.Inventors: Koji Hirata, Takanori Hisada, Masahiko Yatsu
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Publication number: 20100177284Abstract: According to one embodiment, a projector display device includes an enclosure configured with a projection hole and a translucent display screen configured over an aperture in the enclosure. The projection hole receives a light beam generated by a projector. The light beam is directed toward the translucent display screen for producing imagery on the translucent display screen.Type: ApplicationFiled: January 15, 2009Publication date: July 15, 2010Applicant: Texas Instruments IncorporatedInventors: Frank J. Moizio, Julius G. Horvath, Jeffrey A. Garrett
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Patent number: 7731369Abstract: A system and method for mounting a light engine assembly is provided. More specifically, the system comprises a housing structure including an upper portion and a lower portion, a mounting structure coupled to the housing structure, wherein the mounting structure is not affixed to the lower portion, and a light engine coupled to the mounting structure.Type: GrantFiled: December 29, 2005Date of Patent: June 8, 2010Assignee: TTE Technology Inc.Inventors: Michel Cadio, Mark Yoder
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Patent number: 7717571Abstract: A projector/projection type switchable display apparatus includes: a main body unit having an image producing unit forming and emitting an image; and a cover unit that is rotatably connected to the main body unit. The cover unit includes an aspherical mirror enlarging and reflecting the image emitted from the main body unit; and a screen on which the image enlarged and reflected by the aspherical mirror is displayed.Type: GrantFiled: November 15, 2006Date of Patent: May 18, 2010Assignee: Samsung Electronics Co., Ltd.Inventor: Young-chol Lee
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Patent number: 7686458Abstract: A reflection surface (1a) of a mirror (1) has a rotationally-symmetrical shape about an optical axis (110). The mirror (1) is rotatably supported by a pivot supporting portion (41) on the position of the optical axis (110) of the reflection surface (1a) or in the vicinity of the optical axis (110). Furthermore, the mirror (1) is slidably supported by slide supporting portions (42) at two positions on the upper part thereof. With such a configuration, the mirror (1) is supported at three points. Further, even when the mirror (1) expands and contracts due to the change in temperature or the like, the deformation of the reflection surface (1a) of the mirror (1) is prevented by the action of the slide supporting portions (42). As a result, it is possible to prevent the generation of distortion of an image projected on a screen (300).Type: GrantFiled: August 10, 2005Date of Patent: March 30, 2010Assignee: Mitsubishi Electric CorporationInventors: Jyunichi Aizawa, Akihisa Miyata
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Patent number: 7677738Abstract: According to the present invention, an image projector includes a reflecting light valve, a group of refracting lenses forming a projecting optical system that enlarges and projects an optical image given from the light valve, a power mirror having a power and forming the projecting optical system together with the group of refracting lenses, and a transmissive screen for displaying the optical image that is given from the light valve and enlarged by the projecting optical system, wherein the exit pupil position is set such that the minimum angle of view ?min exceeds 40°, and the Petzval partial sum of lenses is set larger than a value determined by the minimum angle of view.Type: GrantFiled: April 6, 2005Date of Patent: March 16, 2010Assignee: Mitsubishi Electric CorporationInventors: Muneharu Kuwata, Tomohiro Sasagawa, Kuniko Kojima, Akihiro Yamada
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Patent number: 7673994Abstract: An image display apparatus that displays an image through scanning by a plurality of beam lights, includes: a light source section that supplies the beam lights; and a scanning section that subjects to scanning the beam lights coming from the light source section. In the image display apparatus, the light source section is driven for a tone representation using the beam lights each having a light amount that is assigned a weight depending on how many bits are allocated in a range from minimum to maximum, and allocates at least two of the beam lights to at least one higher-order bit in the range.Type: GrantFiled: July 24, 2006Date of Patent: March 9, 2010Assignee: Seiko Epson CorporationInventor: Takashi Takeda
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Patent number: 7670007Abstract: A projection display is capable of suppressing both the trapezoidal distortion of an enlarged image projected on a screen by oblique projection and aberrations resulting from oblique projection and includes a projection optical system provided with lenses that can be easily manufactured and assembled. The projection optical system for obliquely projecting an image formed by a display device on the screen includes a free curved lens having a rotationally asymmetric free curved surface. The free curved lens has fringing parts having outlines of a shape coinciding with an arc of a circle having the center on the optical axis of the free curved lens.Type: GrantFiled: June 23, 2006Date of Patent: March 2, 2010Assignee: Hitachi, Ltd.Inventors: Takanori Hisada, Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata, Naoyuki Ogura
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Patent number: 7614749Abstract: An apparatus for producing aerial images is disclosed employing a combination of plastic spherical mirrors, beamsplitter polarizing filters, and light sources. An object to be displayed is illuminated, and its image is partially reflected by the beamsplitter to a focusing mirror and reflected to an aerial position. A polarizer prevents ambient lights or images from degrading or interfering with the aerial images. A clock radio, a personal television display counter, as well as animated mannequin versions are disclosed.Type: GrantFiled: August 22, 2007Date of Patent: November 10, 2009Assignee: Provision Interactive Technologies, Inc.Inventors: Jeffrey L. Vrachan, Curtis L. Thornton
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Patent number: 7572014Abstract: An image display device comprises an optical imaging arrangement for providing image information to illumination light and for transmitting the light as an optical image signal; a display for receiving the optical image signal and for displaying an image based on the image information; and a projecting optical arrangement including a reflecting part having a reflecting surface for reflecting the optical image signal, and a refracting optical part having a refracting surface for projecting the optical image signal onto the reflecting part. At least one of the reflecting surface and the refracting surface is aspherical.Type: GrantFiled: May 1, 2007Date of Patent: August 11, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Suzuki, Kohei Teramoto, Jiro Suzuki, Shinsuke Shikama
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Patent number: 7562986Abstract: Disclosed herein is a laser projection display. The laser projection display includes a light source for emitting light beams each having a predetermined wavelength, and reflective means for reflecting the light beams emitted from the light source and scanning the light beams across a screen.Type: GrantFiled: December 19, 2006Date of Patent: July 21, 2009Assignee: Samsung Electro-Mechanics Co., Ltd.Inventor: Sang Kyeong Yun
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Patent number: 7553031Abstract: 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: GrantFiled: August 8, 2005Date of Patent: June 30, 2009Assignee: Hitachi, Ltd.Inventors: Takanori Hisada, Masahiko Yatsu, Koji Hirata
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Patent number: 7549755Abstract: A projection optical system having a magnification side and a reduction side for forming a magnified image on a magnification side image surface conjugate with a reduction side conjugate image surface includes, arranged in order from the reduction side, a first imaging system including a plurality of lens elements and lens components and a second imaging system including a mirror having a concave, aspheric reflecting surface. An intermediate image is formed between the first imaging system and the second imaging system. The projection optical system satisfies specified conditions related to the travel of principal rays through the projection optical system and related to the Abbe number of a lens element having positive refractive power of the first imaging system. A projection display device includes the projection optical system and may include a light valve for modulating a light beam for projection on a screen.Type: GrantFiled: February 21, 2006Date of Patent: June 23, 2009Assignee: Fujinon CorporationInventor: Takashi Suzuki
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Publication number: 20090141246Abstract: 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: ApplicationFiled: May 28, 2008Publication date: June 4, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jong-soo LEE, Kee-uk JEON, Sang-ik KIM, Jae-geun LIM, Jung-hyeon KIM
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Publication number: 20090122271Abstract: An image display apparatus is provided that allows a user to check image content even in a place where there is no projection screen. A projector that is one mode of the image display apparatus includes a casing, a projection aperture provided in the casing, and an internal projection mirror and a built-in screen that are provided in a casing. When the projector is being folded, laser light emitted from the projection aperture is reflected by the internal projection mirror. The reflected light is projected onto the built-in screen, whereby an image is displayed.Type: ApplicationFiled: November 7, 2008Publication date: May 14, 2009Applicant: FUNAI ELECTRIC CO., LTD.Inventors: Kenji Nagashima, Atsuhiko Chikaoka, Seiji Takemoto, Hiroki Matsubara
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Patent number: 7520623Abstract: In a transmission-type screen and a projection-type display device, which are superior in contrast, a transmission-type screen characterized by including a display plane; a front side layer; and a backside layer having a light-directivity to a light projected from a direction slanted at a predetermined angle with respect to the front side layer thereof, an image being displayed on the display plane when a light is projected from a backside of the screen.Type: GrantFiled: June 13, 2007Date of Patent: April 21, 2009Assignee: Seiko Epson CorporationInventor: Makoto Katase
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Patent number: 7520622Abstract: An apparatus for a display dock with an integrated display screen are disclosed herein.Type: GrantFiled: December 2, 2005Date of Patent: April 21, 2009Assignee: Infocus CorporationInventor: Jeffrey A. Gohman
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Patent number: 7517090Abstract: A device using a low-cost plastic curved mirror and several combinations of methods for reducing aberrations to improve a real image projection system is provided, so as to reduce ghost and astigmatism phenomenon. The real image projection system includes a curved mirror having two different optical surfaces of revolution, one on a convex surface and the other on a concave surface. The real image projection system may include at least a curved reflector positioned in a tilted configuration, and an optical axis of the reflector does not coincide with a viewing axis. A beampath between a target source and the curved reflector neither passes through a beamsplitter nor is reflected thereby. The real image projection system may further include a circular polarizer for circularly polarizing a light beam in a primary light path between the mirror and the real image, eliminating ghost image caused by outside light sources.Type: GrantFiled: August 22, 2007Date of Patent: April 14, 2009Assignee: Provision Interactive Technologies, Inc.Inventors: Jeffrey L. Vrachan, Curtis L. Thornton
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Patent number: 7499213Abstract: A rear projection display apparatus includes a transmission type screen, a video projector, a lens sheet, a plurality of pull portions, and a pulling device. The transmission type screen is installed on a front face of an apparatus main body. The video projector is disposed inside the apparatus main body for projecting a video on the transmission type screen from a rear side. The plurality of pull portions are provided along horizontal and vertical sides of the lens sheet and are pulled by a pulling device which extends along a perimeter of the lens sheet.Type: GrantFiled: March 6, 2007Date of Patent: March 3, 2009Assignee: Sony CorporationInventors: Hiroaki Uchino, Takaaki Iwaki, Yasufumi Ogawa