With Alignment, Registration Or Focus Patents (Class 348/745)
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Patent number: 8004571Abstract: An information processing apparatus is connected to a projection device and an image capture device, and includes an acquiring portion, a detecting portion, and a controller. The acquiring portion acquires images captured by the image capture device. The detecting portion detects positions of the object and a user of the information processing apparatus from the captured images. The controller causes the projection device to project a first indication data indicating storage of at least one of the captured images onto an area except for a linear area linking the user of the information processing apparatus to the object and existing between the user of the information processing apparatus and the object, based on the detected positions of the object and the user of the information processing apparatus, and stores the at least one of the captured images in a memory when the projected first indication data has been interrupted.Type: GrantFiled: June 6, 2008Date of Patent: August 23, 2011Assignee: Fuji Xerox Co., Ltd.Inventor: Akio Yamashita
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Publication number: 20110181792Abstract: According to certain aspects of the disclosure, embodiments of a product merchandiser incorporating a video display is described. The product merchandiser described herein contemplates the use of a rear projector video system for display of video on a reflective film that is adhered to a glass or other transparent exposed surface on the merchandiser. Aspects of the merchandiser provided herein provide a cost-effective, durable, flexible/adaptable to different merchandiser sizes, and non-static means of displaying advertising or other promotions via video directly on an exposed surface of a product merchandiser.Type: ApplicationFiled: January 25, 2010Publication date: July 28, 2011Applicant: PEPSICO, INC.Inventor: Marcus Hammonds
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Publication number: 20110176007Abstract: Aspects of the present invention include systems and methods for recalibrating projector-camera systems. In embodiments, systems and methods are able to recalibrate automatically the projector with arbitrary intrinsic and pose, as well as render for arbitrarily desired viewing point. In contrast to previous methods, the methods disclosed herein use the observing camera and the projector to form a stereo pair. Structured light is used to perform pixel-level fine reconstruction of the display surface. In embodiments, the geometric warping is implemented as a direct texture mapping problem. As a result, re-calibration of the projector movement is performed by simply computing the new projection matrix and setting it as a camera matrix. For re-calibrating the new view point, the texture mapping is modified according to the new camera matrix.Type: ApplicationFiled: January 15, 2010Publication date: July 21, 2011Inventors: Yuanyuan Ding, Jing Xiao
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Publication number: 20110176069Abstract: Embodiments of the present invention generally relate to circuits, systems and methods that can be used to detect light beam misalignment, so that compensation for such misalignment can be performed. In accordance with an embodiment, a circuit includes a photo-detector (PD) having a plurality of electrically isolated PD segments. Additionally, the circuit has circuitry, including switches, configured to control how currents indicative of light detected by the plurality of electrically isolated PD segments are arithmetically combined. When the switches are in a first configuration, a signal produced by the circuitry is indicative of vertical light beam alignment. When the switches are in a second configuration, the signal produced by the circuitry is indicative of horizontal light beam alignment. The signals indicative of vertical light beam alignment and horizontal light beam alignment can be used detect light beam misalignment, so that compensation for such misalignment can be performed.Type: ApplicationFiled: August 25, 2010Publication date: July 21, 2011Applicant: INTERSIL AMERICAS INC.Inventors: Daryl Chamberlin, Dong Zheng
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Rear Projection Imaging System with Image Warping Distortion Correction System and Associated Method
Publication number: 20110176070Abstract: A rear projection imaging system with an image warping distortion correction system using a camera and processing unit to generate a warping map that corrects for image distortion. The warping map is generated in an iterative process by displaying a known pattern on a viewing screen and, through the use of a camera, having a microprocessor determine the location and shape of the pattern on the screen. The microprocessor then compares the displayed image to the original reference image, calculates the distortion effects present in the projection optics, and generates a warping map.Type: ApplicationFiled: January 25, 2011Publication date: July 21, 2011Inventors: Ian E. McDowall, Mark T. Bolas -
Publication number: 20110176068Abstract: Briefly, in accordance with one or more embodiments, a closed loop feedback system for electronic beam alignment in a scanned beam display comprises a light source to emit one or more light beams, a controller to provide a control signal to drive the light source, a scanning platform to receive the one or more light beams and scan the light beams in a scanning pattern to project an image, and an alignment detector to provide a feedback signal indicative of beam position information of the light beams in the far field to the controller. An optic may be disposed in the beam path to magnify and/or to transform beam position information into the far field for the one or more alignment detectors. The controller adjusts the control signal in response to the feedback signal received from the alignment detector to maintain alignment of the light beams in a far field.Type: ApplicationFiled: January 20, 2010Publication date: July 21, 2011Applicant: MICROVISION, INC.Inventor: Joshua O. Miller
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Patent number: 7972018Abstract: Focus adjustment for a projector which includes a projection lens having an adjustable focus position. An asymmetrically focused pattern is projected through the projection lens onto a projection screen, wherein the asymmetrically focused pattern is imaged by the projection lens onto the projection screen with a focus at one portion on the screen that differs with focus at another portion thereof. An image of the asymmetrically focused pattern is captured from the projection screen. A focus adjustment direction is calculated by using asymmetrical aspects of the captured image of the asymmetrically focused pattern. The focus position of the projection lens is driven in the calculated focus adjustment direction so as to move from an out-of-focus state of the projection lens toward an in-focus state.Type: GrantFiled: February 25, 2009Date of Patent: July 5, 2011Assignee: Canon Kabushiki KaishaInventors: Seyed Behzad Sajadi, Yasuhiro Komori, Hung Khei Huang
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Patent number: 7967445Abstract: An image projecting apparatus enables the formation of a projected image faithful to original image information by reducing degradation in the projected image due to decrease in imaging performance of a projection optical system. Image information is processed by an image processing device, which includes a first and a second image processor. A light modulating device modulates a flux of light emitted by an illumination optical system based on the processed image information. The modulated flux of light is projected on a screen by a projection optical system. If the image information processed by the first image processor in a pixel region is not within a representable modulation range of the light modulating device, the image information is processed by the second image processor.Type: GrantFiled: November 13, 2007Date of Patent: June 28, 2011Assignee: Ricoh Company, Ltd.Inventors: Yukiko Hamano, Ryosuke Kasahara, Toshiyuki Kawasaki
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Patent number: 7959300Abstract: A projection image display device including a display plane for displaying an image, a projection mechanism projecting an image on the display plane, and an imaging mechanism arranged on the same side of the display plane as the projection mechanism for imaging the display plane. The imaging mechanism is arranged at a position where a position symmetric with respect to the display plane of the projection mechanism is out of the range of the field angle of the imaging mechanism. By arranging the imaging mechanism at a position where no direct reflecting light of the light source of the projection mechanism comes, it is possible to prevent generation of a hot spot.Type: GrantFiled: June 29, 2006Date of Patent: June 14, 2011Assignee: Ricoh Company, Ltd.Inventors: Keiichiroh Hirahara, Akira Sakurai
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Patent number: 7940329Abstract: A method for making uniform the colorimetric rendering of a display surface including several adjacent display screens (10a, 10b), comprising for each pair of adjacent screens (10a, 10b) steps of: periodically sampling (21) by a calculation device (5) image data in two corresponding screen (10a, 10b) areas (13a, 13b) in the pair of adjacent screens, analyzing (22, 23, 24) by the calculation device (5) image data sampled in each period to determine a difference in calorimetric rendering between the two screen areas, determining by a correction device (6) connected to the calculation device a process to be applied to the video stream to one of the two video systems controlling the two screens in the pair of adjacent screens, by applying a predetermined correction law to the difference in calorimetric rendering, and applying (26) by the correction device the process to said video system, in order to make the colorimetric rendering of the display surface uniform.Type: GrantFiled: February 4, 2009Date of Patent: May 10, 2011Inventors: Francoise Houmeau, Olivier Gachignard, Alain Leyreloup
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Patent number: 7926957Abstract: A multi projection display includes a plurality of projector units to modulate light from an LED light source according to image information to project, a unit image information generating unit to generate unit image information to be inputted to each of the plurality of projector units, and a unit image information correcting unit to correct the unit image information based on a result of capturing projection images projected onto a transmissive screen. For this reason, a shutter, which results in complicating the construction, is not needed and further it is possible to further reduce the adjustment time.Type: GrantFiled: July 16, 2009Date of Patent: April 19, 2011Assignee: Seiko Epson CorporationInventors: Yasunaga Miyazawa, Hiroshi Hasegawa
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Patent number: 7901094Abstract: Light distortion due to light noise or light scattering object in the path of a light beam from a projector to a camera's image sensor in projector-camera systems are mitigated, or eliminated, by a simple modification to a light transport matrix T. For each row in light transport matrix T, matrix entries along a common row are compared, and all but the highest valued entry in the row are zeroed out, i.e. nullified. It is preferred that an array and record notation be used in order to reduce the size of the light transport matrix T, and its modified version to two arrays.Type: GrantFiled: December 21, 2007Date of Patent: March 8, 2011Assignee: Seiko Epson CorporationInventors: Kar-Han Tan, Jing Xiao
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Publication number: 20110051094Abstract: A method having corresponding apparatus and computer-readable media comprises: receiving a first image, wherein the first image includes a plurality of substantially parallel first stripes, wherein the first image conforms to a virtual display space, wherein the virtual display space comprises a first plurality of first pixel locations; projecting the first image from a projector onto a surface, wherein the projector is described by a projector space comprising a second plurality of second pixel locations; capturing a second image of the first image projected onto the surface, wherein the second image conforms to the virtual display space; detecting edges of the first stripes based on the second image; generating second stripes based upon the edges of the first stripes; and determining a correspondence between each second pixel location and one or more of the first pixel locations based upon the second stripes.Type: ApplicationFiled: August 27, 2009Publication date: March 3, 2011Inventor: Steve Nelson
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Publication number: 20110025929Abstract: Aspects of the present invention include systems and methods for obtaining a light transport between a projector and a camera. In embodiments, the light transport between the projector and the camera is represented as a matrix and is obtained assuming that the projector displays on a surface that is planar or at least substantially planar. The light transport matrix is obtained by finding a homography between the projector and the camera. Using the homography to correlate camera and projector pixels and using color values in a captured solid color image, the light transport matrix can be obtained. In embodiments, at least an approximation of an inverse light transport matrix can also be computed, which is useful for many applications, such as inferring unknown projector images.Type: ApplicationFiled: July 31, 2009Publication date: February 3, 2011Inventors: Chenyu Wu, Jing Xiao
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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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Publication number: 20110019108Abstract: Methods having corresponding apparatus and computer-readable media comprise: receiving a first digital image representing a first composite projection, wherein each first composite projection comprises a plurality of overlapping component projections, wherein each of the component projections is generated by a respective projector; and generating one or more respective first intensity scaling maps for each of the projectors, comprising, for each of the first intensity scaling maps, identifying a displayed non-overlap projection region for the projector associated with the first intensity scaling map based on the first digital image, and generating a first intensity scaling map for the projector, comprising determining a distance to the nearest pixel within the displayed non-overlap region of the projector for each pixel outside the non-overlap region of the projector, and assigning a first intensity scaling value to each pixel outside the displayed non-overlap region of the projector based on the respective dType: ApplicationFiled: July 21, 2009Publication date: January 27, 2011Inventors: Steve Nelson, Victor Ivashin
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Publication number: 20110019109Abstract: A projection type image display apparatus (1) comprises a focus correction system (30). The system includes a temperature detection mechanism (16) for measuring temperature in the vicinity of a projection lens group (13), a correction amount calculation unit (18) for calculating a correction amount for correcting the focus shift caused by a temperature change, and a driving signal generation unit (19) for generating, based on the correction amount, a driving signal for driving a focus adjustment mechanism (15). If the user performs a focus adjustment using a focus operation input unit (23), a focus operation determination unit (21) determines that a focus adjustment has occurred independently of the focus correction system and changes a correction condition stored in a memory (20).Type: ApplicationFiled: March 17, 2009Publication date: January 27, 2011Applicant: Konica Minolta Opto, Inc.Inventors: Norio Maeda, Kohei Wataru, Kazuhiko Inoue, Masahiro Terada, Takashi Ohta, Yasumasa Sawai
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Rear projection imaging system with image warping distortion correction system and associated method
Patent number: 7876384Abstract: A rear projection imaging system with an image warping distortion correction system using a camera and processing unit to generate a warping map that corrects for image distortion. The warping map is generated in an iterative process by displaying a known pattern on a viewing screen and, through the use of a camera, having a microprocessor determine the location and shape of the pattern on the screen. The microprocessor then compares the displayed image to the original reference image, calculates the distortion effects present in the projection optics, and generates a warping map.Type: GrantFiled: August 28, 2007Date of Patent: January 25, 2011Assignee: Fakespace Labs, Inc.Inventors: Ian E. McDowall, Mark T. Bolas -
Publication number: 20110013097Abstract: Briefly, in accordance with one or more embodiments, scanned beam projector may comprise a light source, a scan drive and a scanning platform to project an image onto a projection surface. The scan drive circuit is capable of at least partially correcting distortion in the projected image by varying an amplitude of the scan drive signal to at least partially compensate for the distortion in the projected image.Type: ApplicationFiled: July 17, 2009Publication date: January 20, 2011Applicant: MICROVISION, INC.Inventors: Mark O. Freeman, Karlton D. Powell
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Publication number: 20110007227Abstract: There is provided an image projection apparatus comprising: a measuring unit that measures a distance from the image projection apparatus to a projection surface; a generating unit that generates a first operation image if the measured distance is less than a threshold value and generates a second operation image if the measured distance is not less than the threshold value, wherein the first operation image is an image with respect to which an operation can be input by pointing on the first operation image that is being projected with a body part of a user, and the second operation image is an image with respect to which an operation can be input by operating a cursor displayed in the second operation image that is being projected using a predetermined operating unit; and a projecting unit that projects an operation image generated by the generating unit onto the projection surface.Type: ApplicationFiled: May 20, 2010Publication date: January 13, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Osamu Yonishi
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Patent number: 7866832Abstract: The present invention relates to projection systems where multiple projectors are utilized to create respective complementary portions of a projected image. The present invention also relates to methods of calibrating and operating individual image projectors. According to one embodiment of the present invention, an attenuation map is generated for the projectors and pixel intensity values are established for the projectors by applying one or more intensity transfer functions to the attenuation maps. The intensity transfer functions are configured to at least partially account for the non-linear response of the output intensity of the projectors, as a function of an input intensity control signal applied to the projectors. Additional embodiments are disclosed and claimed.Type: GrantFiled: February 15, 2007Date of Patent: January 11, 2011Assignee: Mersive Technologies, LLCInventors: Christopher O. Jaynes, Stephen B. Webb
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Publication number: 20100302466Abstract: A projector includes: a projection lens including a zoom mechanism; a zoom drive unit that drives the zoom mechanism; a zoom amount storage unit that stores an amount of zooming produced when the zoom drive unit drives the zoom mechanism; an operation signal receiving unit that receives a predetermined operation signal; and a zoom control unit that controls the zoom drive unit so as to change a current zooming state to an initial zooming state when the operation signal receiving unit receives the predetermined operation signal, the initial zooming state is determined by the amount of zooming stored in the zoom amount storage unit.Type: ApplicationFiled: May 28, 2010Publication date: December 2, 2010Applicant: Seiko Epson CorporationInventor: Shinji Kubota
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Patent number: 7839457Abstract: A display image correcting device including, retaining section configured to retain reference correction amount data for correcting nonuniformity as a predetermined factor of an image displayed on a basis of a video signal, the reference correction amount data representing an amount of correction at a predetermined horizontal and vertical position of the image, the amount of correction being obtained in correspondence with a video signal level as a reference, and correcting section configured to perform correction processing on the video signal in correspondence with a horizontal direction and a vertical direction of the image, and a brightness direction, and performing the correction processing on a basis of three-dimensional correction amount data obtained by making two-dimensional correction amount data corresponding to a horizontal and vertical position, the two-dimensional correction amount data being obtained on a basis of the reference correction amount data, linearly proportional or nonlinearly proporType: GrantFiled: September 8, 2006Date of Patent: November 23, 2010Assignee: Sony CorporationInventors: Hiroshi Yamagata, Yoshiki Shirochi, Toshinari Fuchigami, Akira Shirahama
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Publication number: 20100289970Abstract: An image display device for optically displaying an image is disclosed. This device includes: a light source; an imaging-light generator converting light emitted from the light source, into imaging light representative of the image to be displayed, to thereby generate the imaging light; a relay optical system focusing the imaging light emitted from the imaging-light generator, on an image plane which is located at an optically conjugate position to the imaging-light generator, the relay optical system defining a pupil through which the imaging light passes, within the relay optical system; a variable-focus lens disposed at a position generally coincident with the pupil, the variable-focus lens having a varying focal length; and a wavefront-curvature adjuster configured to vary the focal length by operating the variable-focus lens, to thereby adjust a wavefront curvature of the imaging light emitted from the relay optical system.Type: ApplicationFiled: July 27, 2010Publication date: November 18, 2010Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventor: Mitsuyoshi WATANABE
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Publication number: 20100277656Abstract: Described herein is processor for providing image data signalling to a projector. The provided image data signalling represents an image to be projected by the projector. The processor comprises both an input to receive movement signalling associated with movement of the projector, and an output configured to provide image data signalling to the projector. The processor is also configured to provide image data signalling to the projector based on received movement signalling.Type: ApplicationFiled: April 29, 2009Publication date: November 4, 2010Inventor: Petri Ahonen
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Patent number: 7824038Abstract: A method for controlling a dual lamp module applied to a projection apparatus is provided. The dual lamp module includes a first lamp and a second lamp. The method for controlling a dual lamp module includes providing a first operating power to the first lamp, and then determining whether the first lamp is turned on or not. If the first lamp fails to be turned on, stopping providing the first operating power to the first lamp, and providing a second operating power to the second lamp. The second operating power is greater than the first operating power.Type: GrantFiled: September 7, 2007Date of Patent: November 2, 2010Assignee: Young Optics Inc.Inventors: Chi-Chui Yun, Pin-Chun Huang, Wei-Sheng Chang
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Publication number: 20100253862Abstract: The present invention provides a projection display device configured to solve a caption dropout problem. CPU 3 determines a correction amount required to correct an image signal for distortion. Scaler 4 corrects the image signal for distortion based on the correction amount. Caption signal processing circuit 5 adjusts the display content of a caption signal based on the correction amount in such a manner that the entire caption indicated by the caption signal is displayed. Display image generation circuit 6 synthesizes the caption signal with the display content thereof adjusted by caption signal processing circuit 5, with the image signal corrected by scaler 4. Projection section 7 projects the synthesized image signal.Type: ApplicationFiled: October 17, 2008Publication date: October 7, 2010Inventor: Mitsuru Takahashi
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Publication number: 20100253861Abstract: A display includes a plurality of matching sections 15 for identifying areas corresponding to partial areas taken with cameras 2a-2f in an imaging area taken with a wide-view camera 1, a projective transformation section 17 for projecting the images of the partial areas taken with the cameras 2a-2f onto the image spaces of the areas identified by the matching sections 15, an overlapped area synthesizing section 19 for synthesizing overlapped areas of the images of the plurality of partial areas projected by the projective transformation section 17, and a rectangular area dividing section 20 for dividing the image after the synthesis to a plurality of rectangular areas, and that a plurality of distortion correcting sections 22 correct the distortion of the images of the partial areas taken with the cameras 2a-2f in accordance with the rectangular areas resulting from the division by the rectangular area dividing section 20, and display the images after the correction on displays 5a-5f.Type: ApplicationFiled: January 15, 2008Publication date: October 7, 2010Inventors: Yoshihiro Tomaru, Masayuki Harada, Hitoshi Fujimoto
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Patent number: 7806534Abstract: A projector for automatically adjusting images projected onto a screen includes a detecting module for detecting a propagation time for projected ultrasonic waves sent by the projector to be echoed back by the screen and received by the projector, a processing module for calculating a projection distance between the projector and the screen based on the propagation time, and outputting a focal length signal corresponding to the projection distance, an optical module, and an adjusting module for adjusting a local length of the optical module according to the focal length signal. A related method is also provided.Type: GrantFiled: April 17, 2007Date of Patent: October 5, 2010Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Shih-Fang Wong, Lin-Kun Ding
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Publication number: 20100245685Abstract: In the usage of table projection of a projection type display, depending upon a sitting position of a participant of a conference, the participant views an image projected upon a table as an inversion image turned upside down, resulting in poor visual recognition. In order to improve visual recognition, images are rotated, synthesized and displayed in accordance with the viewing direction of each participant. More specifically, the projection type display is provided with a two-image synthesizing unit for synthesizing two images obtained by processing an input image by two image rotation units for rotating the input image by a first angle and a second angle different from the first angle, into one image on a screen. The projection type display is also provided with an image rotation unit and an image inversion unit for two-image display on a screen.Type: ApplicationFiled: December 23, 2009Publication date: September 30, 2010Inventors: Shinji ONODERA, Tatsuya Ishikawa, Yusuke Mukai, Satomi Morishita
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Publication number: 20100245684Abstract: A projection system uses a transformation matrix to transform a projection image p in such a manner so as to compensate for surface irregularities on a projection surface. The transformation matrix makes use of properties of light transport relating a projector to a camera. If the resolution a camera is lower than that of a projector within said projection system, then the transformation matrix will have holes where image data corresponding to a projector pixel will have been lost. In this, case, new image are generated to fill-in the holes.Type: ApplicationFiled: March 27, 2009Publication date: September 30, 2010Inventors: Jing Xiao, Kar-Han Tan
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Patent number: 7800628Abstract: A method includes determining a first blend map for a first projector, the first blend map including a first plurality of attenuation factors corresponding to a region of overlap between first and second images projected by the first projector and a second projector, respectively, on a display surface, applying the first blend map to a white level measurement map that includes a plurality of white level measurement values measured from a first plurality of captured images, applying a smoothing function to the white level measurement map to generate a white level target map, and determining a scale map for the first projector from the white level measurement map and the white level target map.Type: GrantFiled: June 16, 2006Date of Patent: September 21, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: Michael Harville, Irwin E. Sobel, Daniel G. Gelb, Andrew E. Fitzhugh
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Publication number: 20100231811Abstract: Keystone correction for a projector. An uncorrected graphic is displayed on a display unit utilizing pixels. The uncorrected graphic is projected from the display unit onto a projection screen to form an uncorrected image. An orientation of the uncorrected image relative to the projection screen is captured. The uncorrected graphic is transformed into a pre-distorted graphic for projection from the display unit onto the projection screen so as to form a corrected image with an orientation more aligned with the projection screen than the orientation of the uncorrected image and such that the pre-distorted graphic utilizes more pixels in the display unit than a second pre-distorted graphic, wherein if formed, would be formed by transforming the uncorrected graphic such that the second pre-distorted graphic forms a second corrected image with a maximum rectangular area inside the uncorrected image when projected from the display unit onto the projection screen.Type: ApplicationFiled: March 12, 2009Publication date: September 16, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Seyed Behzad Sajadi, Yasuhiro Komori, Hung Khei Huang
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Publication number: 20100231812Abstract: The present invention is directed to an illumination system. The illumination system comprises a plurality of light emitting diodes (LEDs) adapted to emit light. The illumination system further comprises a plurality of lens elements disposed subsequent to the LEDs, such that a number of lens elements corresponds to a number of LEDs. Further the plurality of lens elements are adapted to redirect the light emitted by the LEDs on a lens.Type: ApplicationFiled: February 22, 2008Publication date: September 16, 2010Applicant: SHENZHEN TCL NEW TECHNOLOGY LTD.Inventor: Estill Thone Hall, JR.
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Patent number: 7791614Abstract: Method and apparatus for display image adjustment is described. More particularly, handles associated with polygon vertices of a polygon rendered image are provided as a graphical user interface (GUI). These handles may be selected and moved by a user with a cursor pointing device to adjust a displayed image for keystoning, among other types of distortion. This GUI allows a user to adjust a projected image for position of a projector with respect to imaging surface, as well as for imaging surface contour, where such contour may be at least substantially planar, cylindrical, or spherical and where such contour may comprise multiple imaging surfaces. This advantageously may be done without special optics or special equipment. An original image is used as texture for rendering polygons, where the image is applied to the rendered polygons.Type: GrantFiled: December 5, 2007Date of Patent: September 7, 2010Assignee: NVIDIA CorporationInventors: Michael B. Diamond, David R. Morey, Abraham B. De Waal, Jerome F. Duluk, Jr.
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Patent number: 7787062Abstract: A circuit for adjusting image is adapted for rear projection display. The circuit for adjusting image includes a parameter input unit, a data buffer unit, and a geometry transfer unit. The parameter input unit is used to provide a vertical and a horizontal axis amendment parameters. The data buffer unit couples the parameter input unit to buffer the vertical axis amendment parameter and the horizontal axis amendment parameter. The geometry transfer unit is used to receive input frame data with a plurality of pixels, and then every pixel's vertical axis coordinates multiply the vertical axis amendment parameter to transfer every pixel to a new vertical axis coordinate, and every pixel's horizontal axis coordinates multiply the horizontal axis amendment parameter to transfer every pixel to a new horizontal axis coordinate. Finally, the transferred new vertical and horizontal axis coordinates are transmitted to a display for displaying images for users to watch.Type: GrantFiled: May 19, 2006Date of Patent: August 31, 2010Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Wen-Chih Tai, Shian-Jun Chiou, Chia-Lin Liu, Chi-Neng Mo
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Publication number: 20100214540Abstract: Focus adjustment for a projector which includes a projection lens having an adjustable focus position. An asymmetrically focused pattern is projected through the projection lens onto a projection screen, wherein the asymmetrically focused pattern is imaged by the projection lens onto the projection screen with a focus at one portion on the screen that differs with focus at another portion thereof. An image of the asymmetrically focused pattern is captured from the projection screen. A focus adjustment direction is calculated by using asymmetrical aspects of the captured image of the asymmetrically focused pattern. The focus position of the projection lens is driven in the calculated focus adjustment direction so as to move from an out-of-focus state of the projection lens toward an in-focus state.Type: ApplicationFiled: February 25, 2009Publication date: August 26, 2010Applicant: CANON KABUSHIKI KAISHAInventors: SEYED BEHZAD SAJADI, YASUHIRO KOMORI, HUNG KHEI HUANG
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Publication number: 20100201894Abstract: A projector has: light source (1R, 1G, 1B); a light modulation unit (6) that modulates a light emitted from the light source based on image signals; a display control unit (41) that outputs the image signals including main cyclic image signals to the light modulation unit, and controls the display thereof; a projection unit (7) that projects the image based on the light modulated by the light modulation unit; and an imaging unit (40) that captures an image to be displayed based on the light projected from the projection unit, and the display control unit inserts a correction image signal for projecting a correction image, which is visually recognized as a uniform white or gray screen when time integration is performed, between the cyclic main image signals.Type: ApplicationFiled: May 20, 2009Publication date: August 12, 2010Applicant: PANASONIC CORPORATIONInventors: Kenji Nakayama, Tatsuo Itoh, Hiroyuki Furuya, Shinichi Kadowaki, Kazuhisa Yamamoto
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Patent number: 7771055Abstract: A projector displays an image on a projection surface. The projector has a zoom adjusting module and a keystone correcting module. The zoom adjusting module adjusts zoom level of a zoom lens for enlarged projection of image light. The keystone correcting module corrects trapezoidal distortion of the image displayed on the projection surface by means of forming the effective panel image in a revised image formation area, the revised image formation area being part of the image formation area of the panel surface.Type: GrantFiled: June 16, 2008Date of Patent: August 10, 2010Assignee: Seiko Epson CorporationInventors: Morio Matsumoto, Shiki Furui, Masaru Kono
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Publication number: 20100195003Abstract: A projector includes: a first image projection section adapted to project a first image based on a first image signal, a second image projection section adapted to project a second image based on a second image signal such that pixels of the second image are shifted from pixels of the first image, a correction section adapted to correct the image signal input to the image projection section using a correction filter adapted to correct a difference in optical transfer function between the plurality of image projection sections; and a sharpening section adapted to execute a sharpening process of sharpening an edge portion of the image to be displayed, on the image signal having been corrected by the correction section and to be input to the plurality of image projection sections.Type: ApplicationFiled: January 29, 2010Publication date: August 5, 2010Applicant: SEIKO EPSON CORPORATIONInventor: Manabu SAIGO
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Patent number: 7755706Abstract: An image distortion correction method is provided which is capable of correcting for distortion of a projected image by designating an arbitrary correction point by using a simple and easy operation without independently providing a display device and/or a pointing device.Type: GrantFiled: May 10, 2007Date of Patent: July 13, 2010Assignee: NEC Display Solutions, Ltd.Inventor: Youichi Itaki
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Publication number: 20100149436Abstract: A projector for acquiring a coordinate of a bright spot includes a half transparent and half reflecting mirror (22), an imaging device (24), and a processing system (25). The half transparent and half reflecting mirror (22) is provided on a light path between the light source (21) and the zooming system (23). The imaging device (24) captures an external light ray reflected by the half transparent and half reflecting mirror (22). The processing system (25) acquires the coordinate of the bright spot according to the image of the image of the bright spot captured by the imaging device.Type: ApplicationFiled: January 17, 2007Publication date: June 17, 2010Applicant: Lenovo (Beijing) LimitedInventors: Shaoping Peng, Yiqiang Yan, Zifeng Hou, Bo Liu
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Publication number: 20100149437Abstract: The portable device comprises a control IC and a projection display module for the data projection. The portable communication device with embedded projector includes a RF module embedded in the portable communication device for wireless vocal communication; a built-in display embedded in the portable communication device for display; wherein the portable communication device comprises: a control IC; red, green and blue illuminations coupled to the control IC to illuminate a pre-determined light, respectively; a color combiner coupled to the red, green and blue illuminations, wherein the red, green and blue illuminations respectively positioned corresponding to the color combiner which is introduced to combine illuminations from the red, green and blue illuminations for each display color combination; and two-dimension reflector coupled to the color combiner to reflect a pre-determined color illumination on a pre-determined location defined by the control IC to enlarge projection image.Type: ApplicationFiled: February 24, 2010Publication date: June 17, 2010Inventor: Kuo-Ching CHIANG
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Patent number: 7738036Abstract: The present invention provides method for producing a substantially seamless video image on a display surface. The method comprises the steps of separately projecting at least a first and a second video image onto a display surface such that a seam is defined by overlapping portions of said first and second video images. Inside the seam, the brightness of the first video image and the brightness of the second video image are adjusted electronically so as to provide a uniform brightness profile.Type: GrantFiled: December 30, 2004Date of Patent: June 15, 2010Assignee: Thomson LicensingInventors: Yousef Wasef Nijim, Charles Bryan Hunt, Mark Alan Schultz
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Publication number: 20100141852Abstract: The described system 100 provides a digital luminaire 102 which provides optical distortion correction across a wide range variable beam luminaire using lower cost lighter, simpler more efficient higher output optical drives 106 resulting in luminaires 102 that generate higher light output 120-122-124 with lighter units at lower cost over a larger range of beam angles without image distortion.Type: ApplicationFiled: December 5, 2008Publication date: June 10, 2010Inventors: Pavel Jurik, Martin Farnik
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Patent number: 7733429Abstract: Systems and methods are provided that facilitate automatic convergence and geometry alignment in projection systems. Preferably, an optical element such as a lens array is coupled to all areas of the projection system's screen and to a detector element such as a photocell array. In operation, each lens of the lens array is adapted to map an individual portion or region of the screen onto the photocell array. A microprocessor, controller or the like uses the data output from the photocells to instruct an alignment controller to center or steer the beams to compensate for convergence error at a particular location. In a center alignment mode, four (4) or more beacon dots located about the periphery of the screen are detected to determine screen size and position, which is used to center the video image and the centers of the mapped regions on the screen.Type: GrantFiled: April 1, 2004Date of Patent: June 8, 2010Assignee: Mitsubishi Digital Electronics America, Inc.Inventors: Brian Maxson, James E. Hicks
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Publication number: 20100128185Abstract: A display apparatus is capable of displaying a distortion-free projected image based on an image signal from a computer. The display apparatus receives an image signal from the computer and projects an image depending o the image signal onto a projection surface. The display apparatus includes a setting section which sets identification information representative of an aspect ratio of a display of the computer. The identification information set in the setting section can be changed by the user.Type: ApplicationFiled: July 17, 2008Publication date: May 27, 2010Applicant: NEC DISPLAY SOLUTIONS, LTD.Inventors: Tomohiro Nakagawa, Tsutomu Katou
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Patent number: 7724206Abstract: A position adjustment method for adjusting positions of two projection images projected from multiple projectors contained in a multi-projection display onto a projection surface such that the images overlap. A first step involves setting pixel values of colors such that a predetermined characteristic is exhibited in an overlapping area when the adjustment images are projected. A second step involves producing adjustment image data corresponding to the adjustment images. Colors of the adjustment images are allocated to patterns such that the patterns overlap when the adjustment images are projected. A third step involves giving the adjustment image data to the multiple projectors and calculating evaluation values associated with the image data that is obtained by taking an image of the projection surface on which the adjustment images are projected from the multiple projectors. A forth step involves performing position adjustment for the projection images based on the evaluation values.Type: GrantFiled: July 18, 2006Date of Patent: May 25, 2010Assignee: Seiko Epson CorporationInventor: Toshiki Saito
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Publication number: 20100079684Abstract: An image processing device in a projection system that includes a first image generation section adapted to project first image on a projection surface and a second image generation section adapted to project second image on the projection surface so as to overlap the first image is disclosed. The image processing device includes: a pixel shift amount calculation section adapted to calculate a pixel shift amount between the first image and the second image; a modulation transfer function (MTF) obtaining section adapted to obtain MTF at a predetermined frequency, corresponding to the pixel shift amount calculated by the pixel shift amount calculation section; a correction filter generation section adapted to generate a correction filter adapted to correct the MTF so that the image displayed on the projection surface has desired sharpness; and a filter applying section adapted to apply the correction filter to image data corresponding to the image.Type: ApplicationFiled: September 28, 2009Publication date: April 1, 2010Applicant: SEIKO EPSON CORPORATIONInventor: Manabu SAIGO
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Publication number: 20100073580Abstract: A gateway node provides an interface connectivity between communication networks. The gateway node is configured to be operably connected to another gateway node as well as to a base station providing connectivity for a plurality of mobile terminals over a radio interface. Further, the gateway node is configured to send a first peer status report message indicating the respective status of a group of functions of the gateway node which are predetermined to be vital to an application connectivity over the gateway node of selected ones of said plurality of mobile terminals. The first peer status report message is sent periodically.Type: ApplicationFiled: September 7, 2007Publication date: March 25, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventor: Arnd Ritz