Multicolor Picture Patents (Class 353/31)
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Patent number: 9195123Abstract: An imaging system using a spatial light modulator has first color laser light directed by a dichroic element to a rotating member. The rotating member includes phosphor segments that respond to illumination by the first color light to emit second and third color light along a first path to the dichroic element for output, and a light transmitting segment that passes the first color through the rotating member along a second path to the dichroic element for output. In a 3D imaging mode, the first color laser light includes light of two wavelengths, and the phosphor segments include segments that emit second and third color light each of two wavelengths. The output light is directed to a second rotating member that selectively transmit one wavelength of each color while blocking the other wavelength of each color.Type: GrantFiled: October 15, 2012Date of Patent: November 24, 2015Assignee: TEXAS INSTRUMENTS CORPORATEDInventors: Gregory S. Pettitt, John M. Ferri
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Patent number: 9164366Abstract: A projector includes a lighting device that emits light of a plurality of colors, a plurality of vertical alignment mode reflex-type liquid crystal light valves that modulate the color light, a phase difference compensation plate including a C-plate and an O-plate provided between the lighting device and the liquid crystal light valve, a color synthesizing element that synthesizes the color light after modulation, and a projection optical system that projects the synthesized light to a projection target face, and a front side phase difference value of the phase difference compensation plate corresponding to at least one liquid crystal light valve is different from a front side phase difference value of the other liquid crystal light valves.Type: GrantFiled: January 13, 2012Date of Patent: October 20, 2015Assignee: Seiko Epson CorporationInventor: Kazu Kobayashi
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Patent number: 9160992Abstract: A projection apparatus includes a light source module and a micro-electro-mechanical-system (MEMS) mirror. The light source module outputs a plurality of illumination beams having different transmission paths. The MEMS mirror is disposed on the transmission paths of the illumination beams. Each illumination beam propagates to the MEMS mirror respectively, and the illumination beams are respectively reflected by the MEMS mirror to project on a plurality of positions within an imaging region, wherein the transmission paths of the illumination beams transmitted from the light source to the MEMS mirror are not intersected with the imaging region.Type: GrantFiled: June 20, 2013Date of Patent: October 13, 2015Assignee: Lite-On Technology CorporationInventor: Wei-Chih Lin
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Patent number: 9154774Abstract: A stereoscopic imaging system to prevent deterioration in brightness and optical characteristics due to deviation of an optical axis upon formation of a stereoscopic image is provided. The stereoscopic imaging system includes a stereoscopic image display device to output linearly polarized light, a phase difference plate provided at a front surface of the stereoscopic image display device and which converts the linearly polarized light output from the stereoscopic image display device into circularly polarized light, and liquid crystal shutter glasses having a phase difference plate attached to a front surface thereof and which restores the circularly polarized light having passed through the phase difference plate into the linearly polarized light. Upon formation of a stereoscopic image, the liquid crystal shutter glasses may restore light output from the stereoscopic image display device without loss.Type: GrantFiled: August 16, 2011Date of Patent: October 6, 2015Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jin Hyun Cho, Yong Dok Cha
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Patent number: 9140913Abstract: A liquid-crystal projector includes: liquid-crystal panel sections a first illumination section including a red light source, red light emitted from the red light source being applied to a liquid-crystal panel section; a second illumination section including a green light source, a blue light source and a polarizing beam splitter that splits green light emitted from the green light source into p-polarized light and s-polarized light, the green s-polarized light being applied to a liquid-crystal panel section, the green p-polarized light and blue light being applied to a liquid-crystal panel section on the same optical path; a cross dichroic mirror that combines images displayed on liquid-crystal panel sections; a projection lens that projects the combined image; and a control unit that controls on/off states of the red light source, the green light source and the blue light source based on an input video signal to display respective images on the liquid-crystal panel sections.Type: GrantFiled: July 28, 2011Date of Patent: September 22, 2015Assignee: NEC Display Solutions, Ltd.Inventor: Atsushi Katou
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Patent number: 9134597Abstract: A projector including: a plurality of light sources; a modulator that modulates light emitted from each of the plurality of light sources; a projection unit that projects the modulated light modulated by the modulator; a storage unit that stores grayscales of the light sources and adjustment values for adjusting the light emission amounts of the light sources in order to make white balance of the modulated light projected through the projection unit in relation to each other; and a light-emission-amount adjusting unit that adjusts the light emission amounts of the light sources based on the adjustment values corresponding to the grayscales of the light sources.Type: GrantFiled: June 20, 2013Date of Patent: September 15, 2015Assignee: SEIKO EPSON CORPORATIONInventor: Kengo Mizuno
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Patent number: 9131136Abstract: A method for imaging includes focusing optical radiation so as to form respective first and second optical images of a scene on different, respective first and second regions of an array of detector elements. The focused optical radiation is filtered with different, respective first and second passbands for the first and second regions. A difference is taken between respective first and second input signals provided by the detector elements in the first and second regions so as to generate an output signal indicative of the difference.Type: GrantFiled: December 6, 2011Date of Patent: September 8, 2015Assignee: APPLE INC.Inventors: Alexander Shpunt, Benny Pesach
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Patent number: 9128358Abstract: A second projector is configured to be able to connect with a first projector via a USB cable including a VBUS line. The second projector includes an image projecting unit that modulates light emitted from a light source and projects the light, a USB communication unit that detects, in a standby state, the supply of power via a VBUS from the first projector, and a control unit that performs control to switch an operating state of the second projector between the standby state and a normal operating state. When the supply of power of the VBUS is detected by the USB communication unit, the control unit activates the second projector from the standby state to the normal operating state.Type: GrantFiled: March 6, 2013Date of Patent: September 8, 2015Assignee: Seiko Epson CorporationInventor: Shinji Kubota
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Patent number: 9115862Abstract: The invention concerns a light source unit of tunable spectral properties, having a pump light source and a phosphor element for a conversion of pump light into converted light intended for illuminating a target, wherein the phosphor element has at least two phosphor element sections interacting differently with pump light, and wherein the light source unit further comprises a deflecting unit, such as a zoom lens or a variable diffraction grating, for deflecting the pump light so as to vary a distribution of pump light incident onto the phosphor element with respect to the different phosphor element sections, in order to vary spectral properties of the combined converted light beam emanating from the light source unit.Type: GrantFiled: August 24, 2010Date of Patent: August 25, 2015Assignee: OSRAM GmbHInventors: Nico Morgenbrod, Henning Rehn
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Patent number: 9113160Abstract: A 3-dimensional image display device includes: a backlight unit; a barrier panel above the backlight unit and including unit barriers which selectively blocks light; a lenticular lens array above the barrier panel and including lenticular lenses, each having a principal point; a liquid crystal panel above the lenticular lens array; an eye tracking sensor which detects a position of eyes of a viewer and a distance between the principal point of the lenticular lenses and the eyes; and a controller which controls the backlight unit, the barrier panel and the liquid crystal panel based on an output of the eye tracking sensor, where the controller turns on and off the unit barriers such that light passes through the principal point of the lenticular lenses to apply a right-eye image to a right eye of the viewer and apply a left-eye image to a left eye of the viewer.Type: GrantFiled: November 13, 2012Date of Patent: August 18, 2015Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Ryota Odake, Se Joon Oh, Goro Hamagishi
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Patent number: 9110294Abstract: A source light beam is split into an illumination beam and a highlight beam. The highlight beam can be controllably shaped into a shaped highlight beam based on a brightness analysis of an image to output. The illumination beam and the shaped highlight beam are combined and provided to an imaging device that generates the image using the combined beam. An array of reflectors, such as a MEMS mirror device, can be used in conjunction with a stacked rod array to generate the shaped highlight beam. The illumination beam and the shaped highlight beam can be combined using offset lenses or a polarizing beam splitter.Type: GrantFiled: March 15, 2013Date of Patent: August 18, 2015Assignee: Christie Digital Systems USA, Inc.Inventor: Michael Perkins
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Patent number: 9104095Abstract: A stereoscopic display illuminator includes a first light source, a curved mirror, a rotational wheel, an actuator, a multi-band filter, and an optical module. The first light source is used for providing a first light beam. The rotational wheel is disposed between the first light source and the curved mirror. The first light beam is reflected and passes through the rotational wheel in sequence. The multi-band filter allows portion of the first light beam to pass through, and allows another portion to be reflected, where the wavelengths of these two portions do not overlap. The optical module disposed between the first light source and the rotational wheel is used for guiding the first light beam to the rotational wheel, and guiding the first light beam to propagate either from the first reflective segment or from the curved mirror to two opposite sides of the multi-band filter.Type: GrantFiled: July 12, 2013Date of Patent: August 11, 2015Assignee: DELTA ELECTRONICS, INC.Inventor: June-Jei Huang
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Patent number: 9104038Abstract: A scanning projector includes a scanning mirror that sweep a beam in two dimensions. The beam is created by multiple laser light sources, at least two of which create light at substantially the same wavelength. A first of the two light sources is driven up to a transition point past which both of the two light sources are driven (equally or unequally).Type: GrantFiled: April 25, 2013Date of Patent: August 11, 2015Assignee: Microvision, Inc.Inventors: Scott Woltman, Robert James Jackson
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Patent number: 9081265Abstract: Techniques are disclosed for providing a decentralized intelligent nodal lighting system. The intelligent nodal lighting system may be controlled using a wireless protocol, such as Wi-Fi, and each lighting node in the system may have its own independent Wi-Fi address and may receive, store, and interpret commands from a wirelessly connected controller. Each intelligent light node may contain a CPU and memory for storing and interpreting commands from the controller to achieve a desired light color, intensity, or quality. In some embodiments, individual lighting nodes may be dynamically added or removed from the lighting system without interrupting the system's operation.Type: GrantFiled: December 17, 2012Date of Patent: July 14, 2015Assignee: OSRAM SYLVANIA Inc.Inventors: Jeremy Spaulding, Jeffrey Holt, Mervyn Anthony, Karlin Jessen
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Patent number: 9074937Abstract: According to an example, apparatuses for performing multiple concurrent spectral analyzes on a sample under test include an optical system to concurrently direct a plurality of light beams onto analytes at multiple locations on the sample under test, in which the plurality of light beams cause light in either or both of a Raman spectra and a non-Raman spectra to be emitted from the analytes at the multiple locations of the sample under test. The apparatuses also include a detector to concurrently acquire a plurality of spectral measurements of the light emitted from the analytes at the multiple locations of the sample under test. Example methods of performing spectral analysis include use of the apparatuses.Type: GrantFiled: January 30, 2013Date of Patent: July 7, 2015Assignee: Hewlett-Packard Development Company, L.P.Inventors: Huei Pei Kuo, Zhiyong Li, Shih-Yuan Wang, Steven J. Barcelo, Ansoon Kim, Gary Gibson, Alexandre M Bratkovski
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Patent number: 9077847Abstract: A digital TV capable of video communication is discussed. According to an embodiment, the DTV for a video call operation using a camera associated with the DTV, includes a display unit and at least one processor. The processor is configured to display simultaneously, on the display unit, (a) an image received from the camera for a video call operation, and (b) different image setting items for controlling characteristics of the image received from the camera. The processor is further configured to adjust at least one of the characteristics of the image based on a user's control of at least one of the different image setting items, to display on the display unit the image having the adjusted characteristic based on the user's control, and to perform the video call operation with another party using the image having the adjusted characteristic.Type: GrantFiled: December 9, 2010Date of Patent: July 7, 2015Assignee: LG ELECTRONICS INC.Inventor: Sangwu Nam
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Patent number: 9063401Abstract: A laser light source projector includes a plurality of light sources of color groups each including a plurality of laser light sources. The laser light source projector projects an image by driving the laser light sources in each of the color groups. In response to change of the light output characteristics of one or a plurality of laser light sources in an arbitrary color group, light output from a remaining laser light source in the arbitrary color group is adjusted, thereby keeping white balance constant.Type: GrantFiled: February 6, 2013Date of Patent: June 23, 2015Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Makoto Kuriaki, Yasuhito Tanaka, Hisanobu Miyanaga
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Patent number: 9057839Abstract: A method of using an optical device. The method comprises splitting a light beam into a first beam that passes through a first arm of a waveguide, and, into a second beam that passes through a second arm of the waveguide. The method also comprises passing at least one of the first beam or second beam through one or more optical resonators that are optically coupled to at least one of the first or second arms. The method also comprises determining a difference in the light-transmittance of the first beam exiting the first arm and the light-transmittance of the second beam exiting the second arm, and, adjusting the operating wavelength if the difference in transmittance exceeds a predefined value.Type: GrantFiled: July 15, 2013Date of Patent: June 16, 2015Assignee: Alcatel LucentInventor: Mahmoud Rasras
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Patent number: 9052524Abstract: To provide an illumination device and a projection type image display device that illuminate an area to be illuminated (image formation area) under conditions where speckle noise is less noticeable. An illumination device according to the present invention includes: a light source 11 that emits coherent light; an optical scanning section 15 that scans the coherent light emitted from the light source 11; and an optical path conversion system 21 configured to allow the coherent light scanned by the optical scanning section 15 to illuminate an area to be illuminated sequentially in an overlapping manner. An incident angle of the coherent light that enters respective points of the area to be illuminated changes with time.Type: GrantFiled: April 23, 2012Date of Patent: June 9, 2015Assignee: DAI NIPPON PRINTING CO., LTD.Inventors: Yukio Taniguchi, Makio Kurashige, Yasuyuki Ooyagi
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Patent number: 9052512Abstract: A diffractive optical element includes first and second diffractive optical parts to generate diffracted lights two-dimensionally with respect to incident light. The diffracted lights generated by inputting the incident light to the first diffractive optical part are input to the second diffractive optical part in order to generate the diffracted lights from the second diffractive optical part, wherein ?1??2 and k1?k2 stand or, ?1??2 and k1?k2 stand among ?1 and ?2 denote diffraction angles of the first and second diffractive optical parts, and k1 and k2 denote numbers of light spots of the diffracted lights generated by the first and second diffractive optical parts.Type: GrantFiled: February 28, 2012Date of Patent: June 9, 2015Assignee: Asahi Glass Company, LimitedInventor: Koji Miyasaka
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Patent number: 9046487Abstract: A device for lighting an object, with light source provided with a member for sampling a portion of the light, application to the measurement of flux variations of the source. The device includes at least one light source emitting an illuminating light around an illumination axis, for lighting the object, and a photodetector.Type: GrantFiled: August 22, 2012Date of Patent: June 2, 2015Assignee: Commissariat à l'énergie atomique et aux énergies alternativesInventors: Francois Perraut, Thierry Flahaut
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Patent number: 9046753Abstract: A projector includes a plurality of light source boxes (1R, 1G, 1B) each accommodating at least one solid-state light source, emission colors of accommodated solid-state light sources being different from each other, a plurality of photodetectors (205c, 206c, 207c) that are provided within respective light source boxes and that detect light from the solid-state light sources, a plurality of drive units (202 to 204) that supply current to solid-state light sources (205b, 206b, 207b) provided within respective light source boxes, and a controller (201) that holds a reference value for the solid-state light source provided within each light source box for each emission color, that causes each drive to supply current to the solid-state light source provided within each light source box, and that adjusts the amount of current output from each drive unit such that the output value of each photodetector is at a reference value which corresponds to the emission color of the solid-state light source which is a correspType: GrantFiled: May 28, 2010Date of Patent: June 2, 2015Assignee: NEC DISPLAY SOLUTIONS, LTD.Inventor: Hiroaki Takamatsu
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Publication number: 20150146174Abstract: A projector system with a single imaging array has a low-etendue light source. The projector system includes a first optical path from the low-etendue light source to a plurality of optical conversion media having a plurality of emission wavelengths to provide display light with wavelengths longer than blue light. The projector system includes a second optical path from the optical conversion media to the imaging array. The projector system has a means of moving an excitation location on the optical conversion media in the first optical path. The projector system may include a blue LED, a diffuser region, or an optical conversion medium with a blue emission wavelength to provide blue display light. Light from the low-etendue light source is prevented from directly impinging on the imaging array.Type: ApplicationFiled: November 17, 2014Publication date: May 28, 2015Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: John Marshall Ferri, Sajjad Ali Khan, Michael Terry Davis, Vikrant R. Bhakta
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Publication number: 20150146173Abstract: A light source system includes a laser module and at least one light coupling module. The laser module includes a plurality of laser sources, each of which provides a light beam. The light coupling module has a light incident surface, a plurality of total reflection surfaces and a light output surface. The light incident surface includes a plurality of light incident zones, and the light incident zones are disposed corresponding to the laser sources, respectively. The total reflection surfaces are disposed corresponding to the light incident zones, respectively. The projected areas of the total reflection surfaces on the light output surface have no overlap with each other.Type: ApplicationFiled: May 7, 2014Publication date: May 28, 2015Applicant: DELTA ELECTRONICS, INC.Inventor: June-Jei HUANG
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Patent number: 9039194Abstract: Controlling at least one video projector of a video projection system comprising multiple video projectors having a modifiable focal length and adapted to project sub-images. After determining a first calibration parameter associated with a first predetermined focal length of the video projectors, a second calibration parameter corresponding to a second predetermined focal length of the video projectors is computed, the second calibration parameter computed as a function of the first calibration parameter and the second predetermined focal length different from the first one. A display parameter is computed for a video projector, the display parameter being computed as a function of second calibration parameter, and a sub-image to be projected by the video projector is calculated according to the computed display parameter.Type: GrantFiled: December 20, 2012Date of Patent: May 26, 2015Assignee: Canon Kabushiki KaishaInventors: Falk Tannhäuser, Pascal Rousseau
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Patent number: 9039207Abstract: A method for providing a feedback circuit for a three dimensional projector. First and second input devices and a sensor for determining the rotational speed of the second input device are provided. A control device for controlling the rotational speed of the second input device and a phase locked loop (PLL) are provided. A phase reference signal is created based on the signal rate of the first input device. A phase signal is created based on the rotational speed of the second input device. The PLL compares the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized. A signal is sent to the control device for the second input device to change the rotational speed of the second input device in response to determining that the first input device and the second input device are not synchronized.Type: GrantFiled: November 9, 2012Date of Patent: May 26, 2015Assignee: International Business Machines CorporationInventor: Casimer M. DeCusatis
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Patent number: 9039188Abstract: Provided is an illumination device which illuminates an illuminated zone with a plurality of coherent light beams having mutually different wavelength ranges, so that it is possible to allow speckles to be inconspicuous. A illumination device is configured to include an optical element including a hologram recording medium and an irradiation device which illuminates the optical element with a plurality of coherent light beams having mutually different wavelength ranges so as to allow a first and second coherent light beams having different wavelength ranges to scan the hologram recording medium of the optical element. The first coherent light beams incident on respective positions of the hologram recording medium are allowed to reproduce an image superimposed on an illuminated zone, and the second coherent light beams incident on the respective positions of the hologram recording medium are allowed to reproduce an image superimposed on the illuminated zone.Type: GrantFiled: September 8, 2011Date of Patent: May 26, 2015Assignee: Dai Nippon Printing Co., Ltd.Inventors: Tomoe Takanokura, Kazutoshi Ishida, Makio Kurashige, Yasuyuki Ooyagi
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Patent number: 9039187Abstract: The present invention seeks to realize a small etendu illumination optical system, a longer operating life and a higher brightness. The illumination optical system comprises: a laser light source that generates an excitation light; a fluorescent substance that generates a fluorescent light in response to the excitation light, a light tunnel that outputs the excitation light input at one end thereof to the fluorescent substance from the other end thereof, and that outputs the fluorescent light generated by the fluorescent substance from the one end thereof; and a mirror that is placed within a light path between the laser light source and the light tunnel, and that reflects the fluorescent light, the mirror having an aperture formed thereon that allows the excitation light to pass through.Type: GrantFiled: May 21, 2010Date of Patent: May 26, 2015Assignee: NEC DISPLAY SOLUTIONS, LTD.Inventor: Atsushi Katou
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Patent number: 9039186Abstract: A projector includes: a light source device; a light modulation device adapted to modulate a light beam emitted from the light source device; a light transmissive substrate adapted to transmit the light beam modulated by the light modulation device; and a projection optical device adapted to project the light beam transmitted through the light transmissive substrate, wherein the light modulation device includes a first light modulation unit having a plurality of pixels arranged, the pixels having colors different from each other, and the light transmissive substrate is disposed so as to be tilted with respect to an imaginary plane perpendicular to a light axis of the light beam modulated by the first light modulation unit.Type: GrantFiled: January 11, 2012Date of Patent: May 26, 2015Assignee: Seiko Epson CorporationInventors: Hiroaki Yanai, Eiji Morikuni
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Publication number: 20150138509Abstract: A light distribution system with a blue laser and colour conversion is provided. The system comprises: a blue laser light source; a plurality of optical fibers; a light distribution system configured to receive blue laser light from the blue laser light source and distribute the blue laser light to the plurality of optical fibers; a plurality of colour conversion systems, each configured to: receive the blue laser light from at least one of the plurality of optical fibers; and convert the blue laser light to at least one other colour of light different from the blue laser light; and, a plurality of projectors configured to receive the at least one other colour of light, from the plurality of colour conversion systems, for use in projecting images.Type: ApplicationFiled: November 20, 2013Publication date: May 21, 2015Applicant: Christie Digital Systems Canada Inc.Inventor: John DOMM
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Publication number: 20150138511Abstract: A system for uniform distribution of light is provided. The system comprises: an integrating rod comprising an output end opposite an input end, the integrator rod configured to emit, at the output end an integrated image of light received at the input end, the integrated image having an etendue Eimg and an area Aimg at a given distance from the output end; and, an apparatus comprising an input side located at the given distance, the apparatus configured to: receive, at the input side, the integrated image from the output end of the integrating rod; split the integrated image into a number N of sub-images, each of the sub-images having an area Asub, and an etendue Esub, such that Aimg is about N*Asub, and Eimg is about N*Esub; and, relay the sub-images.Type: ApplicationFiled: November 20, 2013Publication date: May 21, 2015Applicant: Christie Digital Systems Canada Inc.Inventor: John DOMM
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Publication number: 20150138510Abstract: A system for variable distribution of light is provided. The system comprises: a plurality of reflective optical devices having a first variable reflective beam splitter configured to receive light along an input light path and direct a first portion of the light along a first light path and direct a second portion of the light to another one of the plurality of reflective optical devices, and a last reflective optical device configured to receive remaining light from a second last reflective optical device and to perform one of: direct the remaining light along a last light path; and, divide the remaining light into two portions, and direct the two portions along two different light paths. At least one optical property of one or more of the plurality reflective optical devices is adjustable to variably apportion received light.Type: ApplicationFiled: November 20, 2013Publication date: May 21, 2015Applicant: CHRISTIE DIGITAL SYSTEMS CANADA INC.Inventor: John DOMM
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Patent number: 9033512Abstract: A projection type display includes an illumination optical system provided with a light source including, for respective predetermined colors, LED arrays each formed of six LEDs, a light source controller that controls the LED arrays to turn on, an integration device, and a DMD, wherein the light source controller controls the LED arrays to turn on such that the shapes of light source images, which are formed on an entrance surface of the integration device by five LEDs of the respective LED arrays, coincide with each other.Type: GrantFiled: January 15, 2013Date of Patent: May 19, 2015Assignee: Mitsubishi Electric CorporationInventors: Hirokazu Taguchi, Kimito Nishikawa
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Patent number: 9033530Abstract: A phosphor device comprising a carrier member having upper and lower faces; a reflecting member having a side surface portion and a bottom portion, the reflecting member being arranged at the upper face of the carrier member; a phosphor layer being embedded in the reflecting member; a transmitting member having a first end face and a second end face, the transmitting member being arranged on the phosphor layer, wherein the first end face of the transmitting member completely covers the top portion of the phosphor layer.Type: GrantFiled: June 22, 2010Date of Patent: May 19, 2015Assignee: OSRAM GmbHInventors: Matthias Bruemmer, Matthias Morkel
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Publication number: 20150131059Abstract: A laser module is described for an image projection system, which has a duochromatic laser diode designed to generate a first beam bundle having laser light of a first wavelength and laser light of a second wavelength; a first collimating optics system designed to collimate the first beam bundle; at least one first monochromatic laser diode designed to generate a second beam bundle having laser light of a third wavelength; a second collimating optics system designed to collimate the second beam bundle; and a first optical combination device developed to combine the first and second beam bundles in order to form an output beam bundle of the laser module.Type: ApplicationFiled: March 25, 2013Publication date: May 14, 2015Applicant: Robert Bosch GmbHInventors: Frank Fischer, Gael Pilard
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Publication number: 20150131060Abstract: A light emitting device includes a substrate, a laminated body formed by stacking a first cladding layer, a first active layer, a second cladding layer, a third cladding layer, a second active layer, and a fourth cladding layer on the substrate in this order, a first electrode connected to the first cladding layer, a second electrode connected to the second cladding layer and the third cladding layer, and a third electrode connected to the fourth cladding layer, the first active layer generates first light using the first electrode and the second electrode, the second active layer generates second light using the second electrode and the third electrode, and a side surface of the first active layer is provided with an emitting section for emitting the first light, and a side surface of the second active layer is provided with an emitting section for emitting the second light.Type: ApplicationFiled: January 7, 2015Publication date: May 14, 2015Inventor: Masamitsu MOCHIZUKI
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Patent number: 9028072Abstract: A laser projection system comprising a laser light and a human body detection module is disclosed. The laser light source emits a laser light. The human body detection module detects a reflective light of the laser light irradiated on an object. The human body detection module determines whether the object is a human according to a relationship between several reflectivity indexes of the reflective light. If the relationship corresponds to predefined situation, the human body detection module reduces a laser output intensity of the laser light.Type: GrantFiled: March 17, 2013Date of Patent: May 12, 2015Assignee: Lite-On Technology CorporationInventors: Wei-Tien Chang, Fu-Ji Tsai, Chih-Chien Lu, Wei-Chih Lin
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Publication number: 20150124225Abstract: A light source device includes a plurality of light sources arranged in a first direction, a first cylindrical lens, which light beams from the plurality of light sources enter, and a lens unit, which light beams from the first cylindrical lens enter. A generating line of the first cylindrical lens is parallel to the first direction. The lens unit is provided with a plurality of cylindrical lenses disposed so as to correspond respectively to the plurality of light sources, and a generating line of each of the plurality of cylindrical lenses intersects with the first direction. An arrangement of a second cylindrical lens included in the plurality of the cylindrical lenses is determined independently of the adjacent one of the cylindrical lenses.Type: ApplicationFiled: October 28, 2014Publication date: May 7, 2015Inventor: Koichi AKIYAMA
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Publication number: 20150124226Abstract: A projection system includes a projection lens, an image modulation device, a light-guiding rod and two light sources. The light-guiding rod is defined with an axial direction and has a first end and a second end. The first end has a transmission surface and a reflection surface. The ratios of the widths of the transmission and reflection surfaces to the panel width of the image modulation device are 0.13˜0.35. The lights of the first and second light sources are incident into the light-guiding rod through the transmission surface and onto a first side surface and reflected into the light-guiding rod through the first reflection surface, respectively. The light-guiding rod homogenizes the incident lights and transmits the homogenized light to the image modulation device through the second end thereby forming an image light. The projection lens projects the image light.Type: ApplicationFiled: October 30, 2014Publication date: May 7, 2015Inventors: MING-KUEN LIN, TSUNG-HSUN WU
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Patent number: 9022572Abstract: A projection apparatus includes a time-sharing light emitting device, a display device, a projection optical system, an illuminance sensor and a lighting determination unit. The time-sharing light emitting device successively emits color lights one by one. The display device modulates the color lights to form an image. The projection optical system projects the image. The illuminance sensor converts illuminance of the color lights into an electric signal which is an output of the illuminance sensor. The lighting determination unit compares the output with a first threshold value, and operates the time-sharing light emitting device in response to the output being more than the first threshold value, and stops the time-sharing light emitting device in response to the output being equal to or less than the first threshold value.Type: GrantFiled: March 12, 2013Date of Patent: May 5, 2015Assignee: Casio Computer Co., Ltd.Inventor: Atsushi Hara
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Patent number: 9022577Abstract: A light source device includes an excitation light source configured to emit and stop an excitation light with a predetermined timing, a fluorescent wheel configured to rotate, the fluorescent wheel including a fluorescent material applied thereon for emitting a fluorescent light in a predetermined wavelength range when irradiated with the excitation light, and an irradiation spot changing unit configured to change a spot on the fluorescent material irradiated with the excitation light.Type: GrantFiled: October 11, 2012Date of Patent: May 5, 2015Assignee: Ricoh Company, LimitedInventor: Toshiharu Murai
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Patent number: 9022578Abstract: A projection display device includes light sources having light-emitting elements for emitting lights in R, G, B colors, temperature sensors for the respective colors disposed near the light sources in the respective colors, light sensors for the respective colors disposed near the light sources in the respective colors for detecting light leakages from the light sources in the respective colors, a cooling unit for cooling the light sources in the respective colors, light modulators employing three panels of liquid crystal devices, a projection optical system, an amount-of-light controller for maintaining a predetermined ratio of the amounts of lights emitted from the light sources in the respective colors, and a cooling controller for controlling the cooling unit for the light sources in the respective colors.Type: GrantFiled: May 28, 2010Date of Patent: May 5, 2015Assignee: NEC Display Solutions, Ltd.Inventor: Shuichi Nakanishi
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Publication number: 20150116668Abstract: A projector includes a light source, a filter unit, an auxiliary light source and a combiner. The light source produces a first beam of light having light in a plurality of ranges of wavelengths, corresponding to a plurality of colors. The filter unit is positioned in the optical path of the first light beam. The filter unit is configured in a first configuration during a first time interval and in a second configuration during a second time interval. When the filter unit is configured in the second configuration, the auxiliary light source produces a second beam of light. The combiner combines the first beam of light and the second beam of light. The combined beams of light are directed to a spatial light modulator.Type: ApplicationFiled: October 28, 2013Publication date: April 30, 2015Applicant: Dell Products, LPInventor: Karthikeyan Krishnakumar
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Patent number: 9016873Abstract: A method for providing a feedback circuit for a three dimensional projector. First and second input devices and a sensor for determining the rotational speed of the second input device are provided. A control device for controlling the rotational speed of the second input device and a phase locked loop (PLL) are provided. A phase reference signal is created based on the signal rate of the first input device. A phase signal is created based on the rotational speed of the second input device. The PLL compares the phase reference signal and the phase feedback signal to determine whether the first input device and the second input device are synchronized. A signal is sent to the control device for the second input device to change the rotational speed of the second input device in response to determining that the first input device and the second input device are not synchronized.Type: GrantFiled: October 25, 2013Date of Patent: April 28, 2015Assignee: International Business Machines CorporationInventor: Casimer M. DeCusatis
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Patent number: 9019437Abstract: The present invention is directed to display technologies. More specifically, various embodiments of the present invention provide projection display systems where one or more laser diodes are used as light source for illustrating images. In one set of embodiments, the present invention provides projector systems that utilize blue and/or green laser fabricated using gallium nitride containing material. In another set of embodiments, the present invention provides projection systems having digital lighting processing engines illuminated by blue and/or green laser devices. In one embodiment, the present invention provides a 3D display system. There are other embodiments as well.Type: GrantFiled: June 17, 2014Date of Patent: April 28, 2015Assignee: Soraa Laser Diode, Inc.Inventors: James W. Raring, Paul Rudy
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Publication number: 20150109585Abstract: A laser beam projection apparatus includes a first light source module including a red color laser light source, a green color laser light source, and a blue color laser light source, and a light source module for combination configured to be capable of emitting a laser beam and be used in combination with the first light source module according to use. The first light source module includes a first casing, and the light source module for combination includes a second casing. The first casing and the second casing have a common casing configuration including at least light source fitting portions.Type: ApplicationFiled: October 16, 2014Publication date: April 23, 2015Inventor: Makoto MASUDA
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Publication number: 20150109584Abstract: A light source device includes a first light source to emit first light having a first wavelength range; a wavelength convertor, disposed on an optical path of the first light, to receive the first light to emit light having other wavelength range different from the first wavelength range; a cyclical movement unit to cyclically move the wavelength convertor while crossing the optical path of the first light; optical parts to define an optical path of the first light, and an optical path of the light emitted from the wavelength convertor; a detector to detect a cyclic movement condition of the cyclical movement unit; and a received light quantity reducing unit to reduce light quantity of the first light received by the wavelength convertor when a cyclic movement condition detected by the detector satisfies an abnormal condition while outputting the first light or the light having other wavelength range to outside.Type: ApplicationFiled: October 2, 2014Publication date: April 23, 2015Applicant: Ricoh Company, Ltd.Inventor: Toshiharu MURAI
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Publication number: 20150109586Abstract: A scanning projection apparatus is provided with a first light source module which includes a laser light source to emit a laser beam and a mirror unit which can be oscillated. Further, a light deflection unit which performs a two-dimensional scanning with the laser beam emitted from the first light source module by the mirror unit, a light detection unit which detects a distance from the mirror unit to an image projection surface or a difference in distance in the image projection surface, and a control unit which controls an oscillation angle of the mirror unit based on distance information from the light detection unit are included.Type: ApplicationFiled: October 17, 2014Publication date: April 23, 2015Inventor: Makoto MASUDA
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Patent number: 9013638Abstract: The present invention is directed to display technologies. More specifically, various embodiments of the present invention provide projection display systems where one or more laser diodes are used as a light source for illustrating images. In one set of embodiments, the present invention provides projector systems that utilize blue and/or green laser fabricated using gallium nitride containing material. In another set of embodiments, the present invention provides projection systems having digital lighting processing engines illuminated by blue and/or green laser devices. In one embodiment, the present invention provides a 3D display system. There are other embodiments as well.Type: GrantFiled: March 6, 2014Date of Patent: April 21, 2015Assignee: Soraa Laser Diode, Inc.Inventors: James W. Raring, Paul Rudy
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Anamorphic illumination of micro-electromechanical display devices employed in multimedia projectors
Patent number: RE45504Abstract: Micro-electromechanical display device (“MDD”)-based multimedia projectors (90, 120) of this invention employ an arc lamp (32), a color modulator (42), and anamorphic illumination systems (94, 121) for optimally illuminating a MDD (50, 76) to improve projected image brightness. MDDs employ off-axis illumination wherein incident and reflected light bundles are angularly separated about a hinge axis (78, 110) and the MDD is illuminated by the anamorphic illumination systems of this invention having a slow f/# parallel to the hinge axis and a faster f/# perpendicular to the hinge axis. The resulting anamorphic light bundles (86, 88, 112, 114) illuminate and reflect more light into and off the MDD and through a fast f/# projection lens.Type: GrantFiled: March 14, 2013Date of Patent: May 5, 2015Assignee: Seiko Epson CorporationInventor: Mark Peterson