Abstract: An image display apparatus is provided, which includes a first image display element corresponding to a first color light, a second display element corresponding to a second color light different from the first color light, and a projection optical system having at least one reflective surface and projecting image lights from the first and second display elements onto a projection plane.

Abstract: The device has flexure correcting means for operating to rotate a first eccentric cam provided at a central part of a first side of a reflecting mirror, thereby moving up and down the central part of the first side to correct the flexure of the reflecting mirror, torsion correcting means for operating to rotate a second eccentric cam or/and a third eccentric cam provided at the ends of a second side opposed to the first side of the reflecting mirror, thereby moving up and down both ends of the second side of the reflecting mirror to correct the torsion of the reflecting mirror, and a rotation operation portion provided at each of extended ends of camshafts provided at the eccentric cams to correct the flexure and torsion of the reflecting mirror.

Abstract: At the time of manual adjustment, a motor driving signal corresponding to a user's key operation is fed to a focusing motor from a microcomputer through a switch. At the time of automatic adjustment, the switch selects a motor driving signal from a sensor and feeds the selected motor driving signal to the focusing motor. The sensor contains a dedicated microcomputer. The dedicated microcomputer samples an image pick-up signal of a CCD line sensor in the sensor to generate contrast data, and automatically drives the focusing motor, to automatically make focusing adjustment.

Abstract: A scanning laser system has a scan position controller to control an X-Y beam translator and a beam power controller to control a light source. A processor has accessible a table having a matrix of elements representing regions having spatial coordinates in at least two dimensions. A plurality of regions is required to define a space approximately sized as a human head. Each element contains a beam power variable indicative of radiation exposure at a corresponding region. Software resident in the processor has code for receiving a value of beam power incident on each region being scanned, for incrementing a stored beam power variable for each region if the beam power value is above a predetermined threshold, and for outputting to at least one of the scan position and the beam power controller a signal indicative of each region at which the beam power variable is above a predetermined value.

Abstract: Method and device for combining images from at least two light projectors, the images having a transition zone between them, wherein the dimensions of the transition zone is known, and the emitted light toward the transition zone from each projector is based on a predetermined transfer function from input signal to projected image for each projector in the transition zone, so as to obtain predictable image characteristics in the transition zone.

Abstract: To automatically adjust the quality of a projection image commensurate with the performance in-time deterioration and aging of projector component parts in an image projection system, each projector detects an integrated service time of its own light-source lamp and a service time and temperature of a liquid-crystal panel, and sends a detection result thereof to a control unit in compliance with a request from the control unit. These parameter values are parameter values having an effect upon the quality of a projection image and varying with time. The control unit copes with the projectors depending upon the detection result received from the projectors, to set predetermined control data for use in image-quality adjustment and send the control data respectively to the projectors. Each projector controls the driving to its light-source lamp and liquid-crystal panel, depending upon the control data received from the control unit.

Abstract: An image processing apparatus for reducing a load of processing of an interpolation operation at the time of a correction of keystone distorted image is provided.

Abstract: A projector includes an image capture device that captures an image in a capture region larger than a projection region of a projection image; an image determining unit that compares and determines the projection image projected by the corresponding projector with another projection image projected in the capture region on the basis of capture information acquired from the image capture device; a transmission image display unit that projects and displays a transmission image indicating that the corresponding projector is ready to perform a tiling projection when the image determining unit determines that the projection image projected by the corresponding projector is the same as the another projection image; a transmission image determining unit that determines whether or not another projector projecting the another projection image has projected the transmission image; and a process parameter creating unit that creates a process parameter which processes display information of the projection image on the ba

Abstract: A projector includes illumination optics for providing light beams, a light modulating apparatus for receiving and modulating the light beams provided by the illumination optics, a projection lens for projecting an image of the light beams received from the light modulating apparatus, a first adjusting device for adjusting a position of the illumination optics and adjusting an angle of incidence of the light beams emitted onto the light modulating apparatus, and a second adjusting device for adjusting a position of the projection lens in response to the adjustment of the position of the illumination optics for creating an offset of a position of the image projected by the projection lens.

Abstract: A projector includes a projecting unit that projects a calibration image containing a plurality of types of pattern images having different shapes, a storing unit that stores correction data showing a correction value for each of the pattern images, a selecting unit that receives selection of a pattern image selected by a user from the pattern images, and a correcting unit that corrects distortion of an image projected by the projecting unit based on the correction value corresponding to the selection.

Abstract: An inexpensive projection lens unit in a rear projection type image display system, having a short focal distance (wide angle of viewing field), high focus and high contrast, and as well, including a power lens made of a glass material having a high refractive index in a range from 1.63 to 1.70 and an Abbe's number of not less than 50 with an optimized incident and emergent configuration in order to satisfactorily correct aberration with a enhanced focusing performance even with a shortened focal distance. Further, the power lens having a high refractive index can exhibit a high power, and accordingly, can carry out satisfactory aberration correction by optimizing the aspheric degree of a plastic lens even though the length of back focus is increased for enhancing the contrast.

Abstract: A system and method for turning a regular computer monitor screen into a touch screen using an ordinary camera. It includes an image-screen mapping procedure to correct for the non-flatness of the computer screen. It also includes a segmentation method to distinguish the foreground, for example an indicator such as a finger, from the background of a computer screen. Additionally, this system and method includes a robust technique of finding the tip point location of the indicator (such as the finger tip). The screen coordinates of the tip point are then used to control the position of the system indicator.

Abstract: An optical engine apparatus to magnify and project an image beam formed by a display device using light on a screen includes a light source to emit the light, a reflection mirror to reflect the light emitted from the light source toward the display device, and an adjuster coupled to the reflection mirror to adjust an inclined angle of the reflection mirror to move the light reflected from the reflection mirror toward the display device in a desired direction. In the optical engine apparatus, a position of light projected on a display device can be easily adjusted.

Abstract: A method of displaying images includes performing geometric processing and photometric processing on a plurality of image frames, thereby generating a plurality of processed image frames, projecting the plurality of processed image frames on a non-planar display surface with at least one projector, wherein the geometric processing includes applying a first plurality of meshes to the plurality of image frames, wherein the first plurality of meshes defines 2D mappings between the display surface and the at least one projector.

Abstract: One form of the present invention provides a method of displaying multiple image streams that includes providing a first plurality of image streams, processing the plurality of image streams, thereby generating at least one processed image stream, and projecting the at least one processed image stream onto a non-planar surface with at least one projector, thereby generating a plurality of different projected image streams at a corresponding plurality of different positions on the non-planar surface.

Abstract: An image processing system enabling luminance regulation depending on displayed images is provided by a projector, the projector including: a signal input section which input an image signal; a signal output section which outputs a corrected image signal; an image projecting section; a correction table storage section which stores a correction table showing the relationship between a correction amount and a position in an image; an instruction input section which inputs instruction information representing a correction instruction from a user; and a luminance regulating section which corrects a luminance value of the input image signal to make a luminance value in a central portion of an image lower than the current luminance value of the center portion when uniformity improvement of luminance values in central and marginal portions of the image is desired, or corrects that to make a luminance value in a marginal portion of an image lower than the current luminance value of the marginal portion when emphasis

Abstract: A method includes providing a display device. The display device may include a plurality of picture elements and a plurality of pixel drivers each for driving a respective one of the picture elements. The method may further include receiving input image data to drive the picture elements to display an image in an image plane. The method may also include receiving user input to indicate a shift in position of the image in the image plane. The shift in position may be by less than the distance between adjacent picture elements. In response to the user input, the input image data may be processed to generate interpolated image data to implement the shift in position. The picture elements may be driven with the interpolated image data.

Abstract: One embodiment of an image rotator includes an image reversion structure that rotates an image by a predetermined number of degrees, and securement structure adapted to removably secure the image reversion structure on a projector.

Abstract: The present invention relates to an optical engine of a projection television in which a path of illumination emitted from a light source is aligned to correspond with the image producer by turning a screw of a mirror device. The object of the present invention can be achieved by an optical engine of a projection television including a light generator, a mirror device for reflecting illumination emitted from the light generator thereby changing a path of the illumination, in which a reflection angle of the illumination can be adjusted, and a projection apparatus for enlarging and projecting the image produced in the image producer on the screen by reflecting the image to an incident illumination from the mirror device, wherein the path of the illumination is aligned to correspond to the whole image produced in the image producer to be projected on the screen by adjusting the mirror device.

Abstract: A video projector projects an image without reducing the resolution, onto the full dome surface by the use of a single-eye fisheye lens. The video projector has a single-eye fisheye lens for projecting a beam of light from an image display device onto the dome surface, a plurality of image display devices jointly uses the fisheye lens. The beams of light from the respective image display devices are combined and sent to the fisheye lens. Projected regions of images displayed on the respective image display devices correspond to certain sections of the dome surface. The projection image extends throughout the full dome surface.

Abstract: To provide a projection type image display system, projector, program, information storage medium and image projection method which can project an image applicable to viewing environment of a changed projection position, a liquid crystal projector is provided with: a sensor for sensing a projection target area and outputting sensing information; an edge detection section for outputting detection information based on the sensing information; a projectable area determination section for determining a projectable area based on the detection information; a projection area selecting section for selecting a projection area from the projectable area; a sensing data generation section for generating sensing data applicable to viewing environment of the selected projection area, based on the sensing information of the selected projection area; an LUT data generation section for generating LUT data; a correction section for correcting image information based on the generated LUT data; and an image projection section fo

Abstract: A concept of improving a resolution by using human's visual characteristics is provided. Bu the present invention, an image can be displayed at a more improved resolution than an actual physical resolution, thereby obtaining the same effect that the resolution is physically improved. An image signal corresponding to one frame is split into a first image signal and a second image signal, and a first image and a second image are formed based on the first image signal and the second image signal. Then, the first image and the second image are respectively displayed at a first location and a second location. As a result, a viewer can view the image at an improved resolution.

Abstract: A method and system for capturing real-time digital image data that is in rasterized form. A digital source sends rasterized data to a storage device, which passes the rasterized data to a display device. The rasterized data is then converted into a page format, such as PowerPoint™ formatted slides, based on changes in the rasterized data. If the data changes quickly enough, the storage device converts the rasterized data into a motion picture format. Otherwise, the rasterized data is stored as a single page static image.

Abstract: An apparatus and method for controlling a convergence of a projection television includes a pattern generator which generates R, G, and B video patterns used for controlling the convergence and then outputs the R, G, and B video patterns to a display, and a controller which compares position coordinates and luminance levels of the R, G, and B video patterns with position coordinates and luminance levels of reference R, G, and B video patterns to adjust the luminance levels of the R, G, and B video patterns to the luminance levels of the reference R, G, and B video patterns.

Abstract: A rear-projection display apparatus includes a housing, a screen mounted on the housing, an optical engine mounted in the housing, and a host unit mounted in the housing and coupled to the optical engine. The host unit includes an on screen display module having an image alignment unit that is operable in an image-alignment mode to enable the optical engine to project a test pattern onto the screen. The image alignment unit is operable to adjust display of the test pattern projected by the optical engine onto the screen such that the test pattern thus displayed is within a predefined range of the screen when the image alignment unit is operated in the image-alignment mode.

Abstract: A white light emitted from a light source is homogenized by an integrator optical system, transmitted through a color polarizer (113) to be turned into an R light and a G light of a P polarized light, and transmitted through a color polarizer (118) to be turned into a G light of an S polarized light and an R light of a P polarized light. These R light and G light are subjected to light modulation in a reflection type spatial light modulation element for G and a reflection type spatial light modulation element for R arranged at unequal distances from a polarization split surface of a polarizing beam splitter (103), and emitted from a projection lens having an axial chromatic aberration corresponding to the unequal distances.

Abstract: A concept of improving a resolution by using human's visual characteristics is provided. An image can be displayed at a more improved resolution than an actual physical resolution, thereby obtaining the same effect that the resolution is physically improved. An image signal corresponding to one frame is split into a first image signal and a second image signal, and a first image and a second image are formed based on the first image signal and the second image signal. Then, the first image and the second image are respectively displayed at a first location and a second location. As a result, a viewer can view the image at an improved resolution.

Abstract: An apparatus and a method for correcting a distorted image is capable of correcting an optical distortion of an image and misconvergence by prewarping an inputted image without using a convergence yoke, and an image displayer using the same. The apparatus for correcting an image distortion for an image displayer in which an image signal is inputted to display an image on a screen and an image distortion is corrected, includes: a reference image generator for generating a predetermined reference image; a camera for inputting the reference image and photographing an image outputted on the screen; and a distortion information extracting unit for comparing the photographed image outputted from the camera and the reference image outputted from the reference image generator, and generating distortion correction information to correct a distortion of the photographed image in case that the image has been distorted.

Abstract: A method and system that objectively measures the convergence and focus of a 2 or 3 spatial light modulator (SLM) projection display. The system uses five (5) CCD cameras and a frame grabber to store red, green, and blue (R-G-B) data from selected pixels located in the corners and center of the projector's field-of-view. The horizontal and vertical locations for the R-G-B pixels at each of the five locations is determined and the delta (?) displacement of the green and blue pixels, relative to the reference red pixel, is calculated and used to converge the image. The optical focus of the system is also determined using a Fast Fourier Transform (FFT). The FFT is performed on this same data and a power spectrum summation beyond the first mimima is determined. The focus is then adjusted to maximize this value.

Abstract: 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.

Abstract: A color calibrating device and associated system and method are used with an image generating device and a projector. The projector projects a first image in response to a first display signal outputted by the image generating device. The color calibrating method includes steps of: capturing the first image; generating a color calibrating function according to the first display signal and the captured image; and calibrating the display signal outputted by the image generating device according to the color calibrating function for projecting by the projector.

Abstract: The present invention discloses a digital image pickup apparatus. The digital image pickup apparatus reads digital image data from a main memory in a horizontal direction. The digital image pickup apparatus corrects an optical distortion component in the horizontal direction in the digital image data. The digital image pickup apparatus writes the digital image data into the main memory in the horizontal direction, so as to store it without changing the direction. The digital image pickup apparatus further reads the digital image data from the main memory in a vertical direction. The digital image pickup apparatus corrects an optical distortion component in the vertical direction in the digital image data. The digital image pickup apparatus writes the digital image data into the main memory in the vertical direction, so as to store it without changing the direction.

Abstract: A projection display apparatus includes a plurality of display units. A control unit controls images generated by the plurality of display units. An optical filter can be inserted to and removed from an optical path. A storage unit stores plural kinds of correction data for each display unit so that correction data can be selected depending on insertion/removal of the optical filter. The control unit selects specific data from the plural kinds of correction data, for each display unit, depending on insertion/removal of the optical filter and controls each display unit based on the selected data.

Abstract: A projection optical system is disclosed with which undistorted images can be obtained at any image position within a specification range, and whose projection angle can be changed. The projection optical system includes a plurality of optical elements and a first optical system constituted by at least one of the plurality of optical elements having the ability to form an image with light onto a predetermined surface different from the projection surface. A projection image of the original image can be moved by rotating a first optical element of the plurality of optical elements substantially around a center of an exit pupil position of the first optical system as the rotation center.

Abstract: A projector includes two range sensors of a phase difference method. The range sensors are laid out near a projection lens in such a way that a line connecting the centers of two photo-sensor arrays incorporated in one of the range sensors crosses a line connecting the centers of two photo-sensor arrays incorporated in the other range sensors approximately at the right angles. A control section controls those range sensors to measure distances to a plurality of ranging points on a screen. The control section computes the tilt angle of the screen based on the measured distances and supplies the computed tilt angle to a trapezoid correcting section and an optical mechanism section.

Abstract: Embodiments provide geometric consistency in overlapping areas when a tiling projection is performed where adjacent projection images have overlapping areas using a plurality of projectors. Embodiments provide a method in which a geometric correction function is formed on the basis of geometric association between positions, in display areas of projectors PJa to PJd, of features included in pattern images projected from the projectors and positions, in projection areas of the projectors, of features included in pattern-photographed images obtained by photographing the pattern images projected onto a projection plane from the projectors and in which the projection images projected from the plurality of projectors are corrected to have geometric consistency on the projection plane using the geometric correction function. The densities of feature points in specific areas of the display or projection areas of the projectors are set higher than those of areas other than the overlapping areas.

Abstract: A short throw projection system and method for displaying a corrected optical image on a projection screen based on input image data that includes an electronic correction unit, an image projector and a reflection assembly. The electronic correction unit receives the input image data and generates pre-distorted image data. The image projector receives the pre-distorted image data from the electronic correction unit and projects a pre-distorted optical image that corresponds to the pre-distorted image data or a pre-distorted image compensated by the projection optic distortion. The optical reflection assembly is positioned in the optical path of the pre-distorted optical image to project an optical image on the projection screen. The reflection assembly can consist of various combinations of curved and planar mirrors as desired.

Abstract: A projector system of this invention includes a camera and a projector. The projector includes a projection image forming unit which forms an image to be projected to a projection surface and a projecting lens. When photographic information in photographing a projection image and distance information to the projection surface are input, a display control unit controls the focal length of the projecting lens in accordance with the photographic information and switches the size of the image formed by the projection image forming unit at the variable control limit of the focal length.

Abstract: 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.

Abstract: Tools for directing a collection of light emitting devices toward pixel locations to make an image are disclosed. A pixel location is a light emitting device target at least twice during a given frame, and each light emitting device in the collection is directed toward at least two different pixel locations during the frame. Adjacent light emitting devices may be directed toward adjacent pixel locations or toward nonadjacent pixel locations.

Abstract: In a rear projection television, cathode ray tubes are mounted inside an enclosure so that each cathode ray tube projects output images onto a rear projection screen using a corresponding electron beam. Calibration images are generated for each cathode ray tube. A camera, also mounted inside the enclosure, acquires an input image of each calibration image. A distortion in each input image is measured, and the output images of the cathode ray tubes are corrected by adjusting the signals controlling the corresponding electron beams according to the distortion.

Abstract: Disclosed is a video display an auto-convergence error in a projection television receiver (TV) capable of preventing generation of an error when an auto-convergence is performed.

Abstract: An image projection apparatus is disclosed with which problems, caused by performing focusing control in a state in which the light amount of a light source is insufficient, can be avoided. The image projection apparatus comprises a controller, performing focusing control of a projection optical system, and a brightness detector which detects at least one of a brightness of the light source and a brightness of a reflected light on a projection surface. After turning the light source on, the controller restricts the focusing control until the brightness detected by the brightness detector reaches a predetermined value.

Abstract: A projector apparatus is disclosed which has a projection unit which projects image corresponding to an input image signal, an instruction unit which issues an instruction for performing keystone correction, a distance survey unit which surveys distances between the projector apparatus and a plurality of positions on the image projected by the projection unit in accordance with an instruction from the instruction unit, and a focus control unit which performs keystone correction of the image projected by the projection unit in a manner that the image becomes a rectangle having an appropriate aspect ratio based on the distances obtained by the distance survey unit, while bringing the image projected by the projection unit into focus at the center position of the image after being keystone-corrected.

Abstract: The method for automatically calibrating a multi-projector system with at least two projectors, a digital camera and a control unit for controlling the projectors and the camera is performed according to the following steps: production, capture and image-filtering of strip patterns, finding the largest projection surface possible, and calculation of warp fields and image-warping.

Abstract: A display device or a receiver device for use with coherent light. A controller applies phase shift values to a multi-region phase array at a frequency sufficiently higher than the flicker fusion rate of the human eye or other intended receiver in order to remove the perception of speckling artifacts which would otherwise appear due to the coherency of the light.

Abstract: The projection display device stores, in a frame memory, a shot image of a test pattern for cases where the obstacle is not represented in the region of the projection; compares, at a comparison unit, a shot image of the test pattern for the case where the obstacle is represented in the region of the projection, with the stored shot image of the test pattern in order to detect an obstacle present in the region of the projection; generates, at an image-mask enlargement-processing unit, an image mask section having a region larger than the region of the detected obstacle; and effects, at a luminance control unit, a control to reduce the luminance in the image mask section.

Abstract: A projector has a distortion correcting circuit for correcting a distorted quadrangular projected image, which is projected onto a projection surface along a projection optical axis inclined in at least one of leftward, rightward, upward, and downward directions, into a rectangular corrected image, such that one of the vertexes B, D on the opposite ends of either one of two diagonal lines of the rectangular corrected image is positioned on one side La of the outer edge of a projection range of the projected image and the other vertex on another side Lb that is positioned adjacent to the one side La.

Abstract: Systems and methods that facilitate automatic convergence and geometry alignment in projection systems such as a PTV. The automatic convergence system (ACS) preferably includes a CCD camera mounted inside the PTV and focused on the entire inside of a projection screen Fresnel lens. Alternatively, the ACS may include a deployable reflective sheet, preferably in the form of a roll up screen. In operation, signals from the CCD camera corresponding to test patterns projected onto the Fresnel lens or reflective sheet are analyzed and used to align, center or steer raster patterns to compensate for convergence error at a particular location. In a convergence mode, the video is blanked and then successive monochrome video test patterns are projected on the screen.

Abstract: Apparatus and techniques for enhancing blending characteristics of a composite image formed by multiple projection displays are detailed. Included among the apparatuses and techniques is the use of masks, having complimentary, non-linear edges, between a projection axis and a screen. The masks are used to solve the geometric and photometric issues involved with blending sub-images to form a composite image.