Abstract: To provide an image processing system and others which can project an image more accurately and at higher speed while using a screen or the like as effectively as possible, there is provided a projector including a calibration image information generating section, an image projection section having a view angle adjusting section and a lens shift section for adjusting an optical axis of a projection lens to project the calibration image onto the screen or the like, a sensing section which senses a region including the projected calibration image and the screen or the like through a sensing surface to generate sensing information, a projection area information generating section which generates projection area information based on the sensing information, a target area information generating section which generates target area information based on the sensing information, and a projection control section which controls the view angle adjusting section and lens shift section based on the projection area informat

Abstract: A lens held by a lens holding member is centered easily and correctly by a mechanism in which a guide pin is inserted into a guide hole for positioning the lens holding member with respect to the main body unit of the lens barrel in a plane perpendicular to the optical axis of the lens and for mounting the lens holding member for movement in a direction along the optical axis. Adjustment pins are rotationally mounted on at least three sites on the outer peripheral surface of the main body unit of the lens barrel. If each adjustment pin is rotated, an offset portion of the adjustment pin which is relative to the center of rotation of the adjustment pin, is rotated, as the offset portion is engaged in an engagement hole of the lens holding member. In this way the lens holding member on each site is displaced in the direction along the optical axis to adjust the tilt of the lens held by the lens holding member.

Abstract: A projection type image display apparatus capable of achieving accurate focusing of a projection optical system using an output from a photoreception sensor, is disclosed. The projection type image display apparatus includes a projection optical system and performs focusing control of the projection optical system based on an output signal from an photoreception sensor. The photoreception sensor receives light from the projection surface. The optical axis of the projection optical system is shifted with respect to a reference axis. The reference axis leads from the center of an original image formed on an image forming element to the center of the projected image. The photoreception sensor receives light from a detection area which is proximate to and includes the position of the optical axis of the projection optical system on the projection surface.

Abstract: A projector lens system includes a negative first lens group and a positive second lens group. The first lens group comprises a first lens element that is formed as a negative meniscus lens element, a positive or negative second lens element, a negative third lens element, a positive fourth lens element that is cemented to or separated from the third lens element, and a negative fifth lens element. The first lens group satisfies condition (1) with respect to the refractive power thereof, and satisfies condition (2) with respect to the refractive power of the negative first lens element of the negative first lens group: 0.6<fw/|fI|<1.0(fI<0)??(1) 0.3<fI/f1,1<0.7??(2) wherein fw: focal length of the entire projector lens system at the wide-angle extremity; fI: the focal length of the negative first lens group; and f1,1: the focal length of the negative first lens element of the negative first lens group.

Abstract: In a projection optical system projecting an image displayed on a predetermined play surface onto a predetermined projection surface, two decentering lens units movable in directions vertical to the optical axis and substantially vertical to each other are included between a rear lens unit situated on the display surface side and a front lens unit situated on the projection surface side, a driving mechanism is provided that reciprocates the two decentering lens units in the directions vertical to the optical axis. When the focal lengths of the two decentering lens units are FD1 and FD2, respectively, and the focal length of the rear lens unit is FR, the relationships 0.01?|FR/FD1|?0.2 and 0.01?|FR/FD2|?0.2 are satisfied.

Abstract: Projector has projection optical system for projecting an image onto a projection surface and optical zoom mechanism for actuating projection optical system to enlarge and reduce the image projected onto the projection surface. Projector also has distortion correcting circuit for correcting distorted quadrilateral projected images, which are projected onto the projection surface along an optical axis that is oblique vertically and horizontally to the projection surface, into respective square corrected images, zoom setting detector for detecting a zoom setting of optical zoom mechanism, and CPU for generating corrective data to be set in distortion correcting circuit based on the zoom setting detected by zoom setting detector.

Abstract: A highly efficient projection system, including a light source, a scrolling unit, a color separation hologram, a light valve, and a projection lens unit. The scrolling unit includes spirally arranged cylinder lens cells to scroll/cycle incident beams while rotating. The color separation hologram separates a beam radiated from the light source into beams with different wavelengths. The light valve forms a color image by turning on or off pixels according to an input image signal. The projection lens unit magnifies the image formed by the light valve and projects the magnified image toward a screen. In this projection system three color beams from the light source are scrolled simultaneously to produce a picture, resulting in a highly light efficient projection system.

Abstract: The invention makes it easier to perform adjustments for bringing into conformity an illuminating area of an illuminating color light beam. A projector in accordance with the invention includes an illumination optical system; a color light separation optical system that separates illumination light into illumination light beams of a plurality of colors; a plurality of electro-optical devices that convert the illumination light beams of a plurality of colors into light beams of a plurality of colors; a color light synthesizing optical system that synthesizes the converted light beams of a plurality of colors that exit from the plurality of electro-optical devices; a projection optical system that projects the color image that is represented by the synthesized light beam; and a relay optical system that is provided in a path of at least one color illumination light beam.

Abstract: A rib, provided on an outer periphery of a projection ring, includes: a first rib extending along a direction in which an optical axis of a lens main body extends (an attachment direction of a focus lens); and a second rib, brought into contact with one end of first rib, extending along a direction approximately orthogonal to first rib so as to have one side and the other side. On the other hand, a protrusion, provided on an inner periphery of the cylindrical focus ring, includes a pair of protrusion parts arranged with a spacing in a direction in which an optical axis extends. With this structure, it is possible to obtain a projector having a focus ring capable of being easily attached to a lens main body and being easily molded.

Abstract: A projector includes a light source, a beam splitter for splitting a light irradiated from the light source into a plurality of partial light beams, a polarization converter for converting the light beam irradiated from the beam splitter into a predetermined linear polarization light beam, and a lens array for transmitting the plurality of partial light beams irradiated from the polarization converter to a light modulator, where the polarization converter and the lens array are integrated by a holding frame and are fixed to a fixing portion of a support, so that the polarization converter and the lens array can be attached to the fixing portion of the support while adjusting position of the integrated component relative to the fixing portion, thus reducing trouble for position adjustment.

Abstract: A projection system including a light source, a rectilinearly reciprocating cylindrical lens array, an optical separator, a light valve, and a projection lens unit. The light source emits a beam. The rectilinearly reciprocating cylindrical lens array advances color beams along different paths upon reciprocation. The optical separator separates the beam emitted from the light source into color beams according to wavelength. The light valve receives the scrolled color beams transmitted by the cylindrical lens array and forms a color image by pixels turning on or off according to an input image signal. The projection lens unit magnifies the color image formed on the light valve and projects the magnified color image on a screen.

Abstract: A system for enhancing the quality of an image on a screen is provided. The system typically includes an illumination source configured to produce light and direct such light along an optical path, and a time-varying focus device disposed in the optical path and configured to periodically alter incident light to enhance the quality of the image on the screen.

Abstract: A projector includes a light source, a beam splitter for splitting a light irradiated from the light source into a plurality of partial light beams, a polarization converter for converting the light beam irradiated from the beam splitter into a predetermined linear polarization light beam, and a lens array for transmitting the plurality of partial light beams irradiated from the polarization converter to a light modulator, where the polarization converter and the lens array are integrated by a holding frame and are fixed to a fixing portion of a support, so that the polarization converter and the lens array can be attached to the fixing portion of the support while adjusting position of the integrated component relative to the fixing portion, thus reducing trouble for position adjustment.

Abstract: A projection device is provided with a locking device to couple a first optical component to a second optical component that is configured to be disposed adjacent to the first component to define an optical path. The locking device includes a latch mechanism and an alignment system. The latch mechanism may be coupled to the second component and may be configured to enable a user to manually couple the second component to the first component and to manually release the second component from the first component. The alignment system and the latch mechanism may be configured to cooperatively and releasably couple the second component to the first component in a predetermined orientation.

Abstract: A projection system includes first and second light sources, separated by a predetermined distance from each other and radiating a single white light in parallel and in the same direction, first and second spiral lens discs including cylindrical lens cells separating the single white light incident from the first and second light sources into a multi white light by converting a rotational motion of the cylindrical lens cells into a rectilinear movement, and first and second spectroscopes separating the multi white light incident from the first and second spiral lens discs into color light beams having different wavelength bands. First and second light valves modulate the color light beams incident from the first and second spectroscopes according to an image signal to form an image. First and second projection lenses project the color light beams modulated by the first and second light valves onto a screen to display the image.

Abstract: Support structure for a projector. The projector includes an optical engine, a lens sleeve and a support structure. The lens sleeve has an end connected to the optical engine, like a cantilever beam. The support structure supports the lens sleeve in such a manner that the lens sleeve can be rotated.

Abstract: The projector includes an image modulator, a lens, a supporting frame for supporting the image modulator and the lens, a circuit board, and a frame. The supporting frame includes a first fixed side, a second fixed side, and at least one elastic protrusion having one end connected to the first fixed side, and another end having a gap with the second fixed side. The method utilizes the elastic protrusion of the supporting frame to adjust relative positions of the image modulator and the lens to optimize the focus of the lens.

Abstract: A horizontal/vertical dual-mode LCD projector includes a first casing having a square mounting open side, a second casing having a square mounting open side connectable to the mounting open side of the first casing between two positions at 90° angle, a lamp module mounted in the first casing, two lens arrays respectively mounted in between the mounting open side of the first casing and the lamp module, and an optical module mounted inside the second casing.

Abstract: An optical projection module includes a front optical module, a rear optical module and an adjustment member mounted between the front and rear optical modules. The front optical module includes a lighting module, an integrated rod and a color wheel. One end of the adjustment member is pivotally mounted to the front optical module, and the other end of the adjustment member is screwed on the rear optical module to form the optical projection module. By linear movement of the rear optical module actuated by rotation of the adjustment member along an optical axis, a relative position of the rear optical module and the front optical module is adjusted so that lights coming from the color wheel are clearly projected on a light valve with simplified digital signal processing, reduced loss of luminance and increased luminescence efficiency.

Abstract: Both end parts of a feed screw device are movably supported through cushioning members, and an inertia force of the screw after a movable member moved by the screw has collided against a stopper is absorbed by a movement in an axial direction, so that an impact at a drive end can be softened. When the guide part comes into contact with the stopper and a projection lens barrel is positioned at an upper end of a moving stroke, an upward movement of the barrel is stopped, but a motor is in a rotating state. A driving power of the motor is continuously transmitted to the screw, but since an upward movement of a nut member is restricted, a downward movement force is given from the motor to the screw. Then, the screw moves downward against an urging force of a spring.

Abstract: A telescopically collapsible image projector has a tri-segmented body. Within the body is mounted a light source, an imaging device such as a fully colour LCD display capable of receiving electronic signals representing images for display, keystone correction means, focusing means, and heat dissipation means. In its operating configuration the body segments are fully extended and a rigid optical pathway is established. Upon full extension, heat sinks in the form of air voids are created to collect radiated heat from operating components of the projector. A forced air system comprising a fan/motor combination draws cooling air in through the body of the projector and exhausts heated air through an exhaust port. In its stowed configuration, the heat sink air voids are used as stowage space to enable the body segments of the projector to telescopically collapse within each other forming a compact object with a small stowage foot print.

Abstract: An automatic focusing projector comprises a rangefinder, microprocessor, stepping motor and zoom lens. The rangefinder is used to measure a distance between the projector and a projection screen. The table look-up method is used to obtain a position that the stepping motor should be rotated after the microprocessor read the distance. And then, the stepping motor is commanded to drive the zoom lens to the position. Thereby, the automatic focusing method can be performed on a projector device.

Abstract: Image projector having a selectively shiftable projector lens assembly and apparatus for selectively shifting a projector lens assembly. In one embodiment, the image projector may include a projector housing, a light engine supported by the projector housing, and a projector lens assembly supported by the projector housing. The projector lens assembly defines an optical axis and is oriented relative to the light engine for receiving and projecting light emitted by the light engine. In one embodiment, the lens shifting apparatus may include a first plate movably coupled to the projector housing and supporting the projector lens assembly. The first plate may be selectively movable along a first axis perpendicular to the optical axis. The first plate may be movably coupled to a second plate which is movably supported by the projector housing for selective travel about a second axis that is perpendicular to the optical axis and the first axis.

Abstract: Image projector having a selectively shiftable projector lens assembly and apparatus for selectively shifting a projector lens assembly. In one embodiment, the image projector may include a projector housing, a light engine supported by the projector housing, and a projector lens assembly supported by the projector housing. The projector lens assembly defines an optical axis and is oriented relative to the light engine for receiving and projecting light emitted by the light engine. In one embodiment, the lens shifting apparatus may include a first plate movably coupled to the projector housing and supporting the projector lens assembly. The first plate may be selectively movable along a first axis perpendicular to the optical axis. The first plate may be movably coupled to a second plate which is movably supported by the projector housing for selective travel about a second axis that is perpendicular to the optical axis and the first axis.

Abstract: A system for enhancing the quality of an image on a screen is provided. The system typically includes an illumination source configured to produce light and direct such light along an optical path, and a time-varying focus device disposed in the optical path and configured to periodically alter incident light to enhance the quality of the image on the screen.

Abstract: By mounting a projection lens to a first supporting member for fixing spatial light modulators, polarization beam splitters and a cross dichroic prism, and providing a second supporting member having a thermal expansion coefficient larger than that of the first supporting member between the projection lens and the first supporting member, afluctuation of distance between the spatial light modulators and the projection lens due to heat generated by a light source lamp of a projection type display apparatus and temperature change in use environment can be canceled so that an optimum projected image having nothing to do with being out of focus can always be obtained.

Abstract: A projection system includes first and second light sources, separated by a predetermined distance from each other and radiating a single white light in parallel and in the same direction, first and second spiral lens discs including cylindrical lens cells separating the single white light incident from the first and second light sources into a multi white light by converting a rotational motion of the cylindrical lens cells into a rectilinear movement, and first and second spectroscopes separating the multi white light incident from the first and second spiral lens discs into color light beams having different wavelength bands. First and second light valves modulate the color light beams incident from the first and second spectroscopes according to an image signal to form an image. First and second projection lenses project the color light beams modulated by the first and second light valves onto a screen to display the image.

Abstract: A projection system that projects a text or subtitle box onto an image minimizes the contrast between the text box and the image. A transition region surrounding the text box minimizes visual disruption to the image onto which the text box is projected. The positions of optical elements of a text projector enable the text box to gradually fade out. The text projector has a lamp that defines an object plane and a light path modifier. The light path modifier is offset from the object plane, toward the lamp to blend the borders of the text box into the image projected by an image projector.

Abstract: This specification discloses a projection type display apparatus for projecting an image onto the surface of a screen, including an image display device illuminated by illuminating light from a light source and for displaying an image thereon, a projecting optical system for projecting the image from the image display device onto the surface of the screen, a condition detection device for detecting a condition related to the image, an adjusting device for adjusting the condition of the image in conformity with the output of the condition detection device, an operation device for effecting the ON/OFF of the power source of the projection type display apparatus, and a controller for causing the condition detection device to be operated and also, limiting the inputting of an input image signal to the image display device when the power source of the projection type display apparatus is switched on by the operation device.

Abstract: To provide a projection type illuminating device which can clearly form a silhouette, a projected figure or the like at a projecting position by a lighted electric lamp, and is safely used without damaging an eye even when the light accidentally enters the eye of a person.

Abstract: In a rear projector for projecting an image from behind a screen, its screen size is variable. In order to permit flexible adaptation to the variation in the screen size, the projector is constructed to permit easy adjustment of a detection device for detecting an image display position or a position indicated on the screen.

Abstract: A display optical unit includes a light valve which modulates light to form picture information, a light splitter which splits light into a plurality of color components and for directing each of the color components to the light valve, an illumination unit which directs light emanated from a light source to the light splitter, and a projection lens which magnifies and projects the modulated light having the picture information for displaying a picture. An optical axis of the projection lens is shifted from an optical axis of the illumination unit and the light splitter, and a projection lens unit including the light valve and the projection lens has a positioning mechanism which determines a position thereof when attached and is attachable and detachable in a direction perpendicular to an optical axis of the projection lens unit.

Abstract: An image edge blender (58) of this invention installs in an unmodified projector (50) in place of the projection lens (52), which then installs at the output end of the image edge blender assembly. The image edge blender includes a relay lens (64) that relays an objective image plane (66) formed in the projector to an intermediate focal plane (68) formed within the image edge blender. An adjustable aperture assembly (70) includes at least one shutter (96) positioned at or near the intermediate focal plane and movable in rotational, parallel, and transverse directions relative to-the optical axis (78).

Abstract: A projector that can be easily set up and adjusted is disclosed. In accordance with a projection condition inputted into a microcomputer via a remote-controller, the microcomputer selects an optimum projection lens by referring to correlation data showing a relation among a projection lens, a projection display size, and an optimum projection distance. The microcomputer has a screen to indicate an optimum projection lens and projection distance that satisfy the inputted projection condition. The microcomputer calculates the amounts of zoom and focus adjustments to be made to the projection lens with reference to the correlation data so as to attain the projection display size and the microcomputer automatically drives the projection lens via a zoom driving unit and a focus driving unit.

Abstract: An arrangement is disclosed for cutting off intensive radiation in projectors and/or illumination devices whose projection head, which projects the light, is mounted in a receptacle or holder rotatable about an azimuth axis so as to be swivelable about an additional axis arranged vertical to the azimuth axis. It comprises a cutoff mechanism which comprises a coupling member, and light-absorbing means or cutoff means, which is fixedly connected with the receptacle and which is rotatable jointly with the latter and with the projection head about the azimuth axis, wherein the light-absorbing or cutoff means are positioned in the cutoff position in front of the light outlet opening of the projection head or of an objective or in an intermediate image plane located within the projection head. The arrangement is suitable for application particularly with projection of image contents on plane, arched, or curved projection surfaces.

Abstract: The projection lens shifting mechanism is for locating the projected picture at a desired position on the screen by shifting the projection lens with respect to the display surface of the display device, including a base plate secured to the housing of the projection lens shifting mechanism and having a guide surface parallel to the display surface, a moveable plate rigidly holding the projection lens and movable in a prescribed direction parallel to the display surface guided by the guide surface, a holding plate linked to the moveable plate through elastic members, constituting, together with the moveable plate, an elastic clamp structure that holds the base plate and elastically clamps the base plate. When an external force works against the elastic force to release this clamp, the holding plate can move integrally with the moveable plate in a direction parallel to the guide surface of the base plate.

Abstract: A system detects reflected light from a projection screen associated with a projection display. Reflected light may be analyzed to determine whether the projector is in focus. This information may be used to create input signals that automatically focus the projection display.

Abstract: The invention relates to objective arrangements for use in projection systems such as overhead projectors. An objective arrangement 10 provides a tilted image plane. The arrangement 10 is rotationally asymmetric by virtue of the third element 16 having a principal optical axis 22 which is displaced to one side, but parallel with the principal optical axes 20 of the first and second elements 12,14. This asymmetry has been found to correct aberrations introduced by a tilted Fresnel lens used in the projection arrangement.

Abstract: A projector device is disclosed which uses light that is spatially modulated by a DMD having mirrors which are moveable between Off and On positions in response to image information input to the DMD. Images formed at the DMD are projected onto a screen via a projection lens. Surfaces of the lens elements of the projection lens are designed with curvatures such that light that may be undesirably reflected back to the DMD will not be in a converged state at or near the surfaces of DMD mirrors. In this way, ghost light that is projected onto the screen is dispersed over a wider area, and thus is less noticeable and not troublesome.

Abstract: An image projection system includes an image generator, a screen and a focus and aim component. The focus and aim component receives modulated light from the image generator and focuses and deflects the light as a function of a position on the screen. The component consists of an array of lenslets with wedge. The wedge or prism refracts the light and the lens focuses the light. As a result, the optics are selectively tailored to provide a clear image over the entire field of view, even in systems compact in depth that would otherwise rely on a short focal length lens. Acute incidence angles at the periphery of the screen are handled by TIR Fresnel lens elements or by diffractive elements. The focus and aim capability is alternatively provided by holographic elements in a holographic array.

Abstract: For providing the image projecting system capable of substantially superimposing images without image blur which are provided from a plurality of image projecting apparatus when the original images are superimposed using the plurality of image projecting apparatus, distortion value of distortion aberration of images from projecting optical system comprised in the image projecting system is made substantially coincided in a region of using image height.

Abstract: A projector has a housing, a screen installed in the front of the housing for displaying an image, a projecting modole installed in the housing, a control module, and at least One detector. The projecting module includes an image generator that converts image signals into an image with a corresponding resolution, and a projecting lens set used for projecting the image onto the back of the screen. When the control module receives a focus-changing signal, the control module will change the focus of the projecting lens set to adjust the size of the image. The detector is installed on the screen for sensing the image on the screen. When the control module receives the focus-changing signal, the control module will continuously change the focus of the projecting lens set to adjust the size of the image until the detector senses the edge of the image.

Abstract: A projection system includes a projecting portion for projecting image light onto a predetermined projection receiving portion, an image taking portion for taking a projected image obtained by the projecting portion, and a processing portion for performing a predetermined processing based on the image taking result obtained by the image taking portion. An image taking lens of the image taking portion is arranged outside the reflection region of the direct reflection light of the projected image.

Abstract: In a projection type picture display apparatus, three degrees of freedom out of six degrees of freedom which are adjusted by an angle-of-view adjusting mechanism are adjusted by using one adjusting plate (three-axis adjusting plate). The adjusting plate on which a projection unit is fixedly supported rotates the projection unit around the X-axis or Z-axis with respect to a screen disposed in parallel to the XY plane and translates the projection unit in the Y-axis direction to adjust three degrees of freedom. The adjusting plate has first, second and third support shafts extending in the Y-axis direction, a first adjusting shaft engageable with the first and second support shafts, and a second adjusting shaft engageable with the first and third support shafts, and adjusts the three degrees of freedom of the projection unit on the basis of the combination of the engagements.

Abstract: A projection system includes a total reflection element, an image reader, an analysis system and a server device. The image reader reads a projective image guided by the optical projection device and the total reflection element and outputs a read signal. The analysis system analyzes the read image by an evaluation function and determines the clearest image on the projective plane so as to output an adjustment signal. The server device automatically performs the focal adjustment to the optical projection device based on the adjustment signal.

Abstract: The projection lens shifting mechanism is for locating the projected picture at a desired position on the screen by shifting the projection lens with respect to the display surface of the display device, including a base plate secured to the housing of the projection lens shifting mechanism and having a guide surface parallel to the display surface, a moveable plate rigidly holding the projection lens and movable in a prescribed direction parallel to the display surface guided by the guide surface, a holding plate linked to the moveable plate through elastic members, constituting, together with the moveable plate, an elastic clamp structure that holds the base plate and elastically clamps the base plate. When an external force works against the elastic force to release this clamp, the holding plate can move integrally with the moveable plate in a direction parallel to the guide surface of the base plate.

Abstract: A projection optical system for projecting onto a screen an image formed on a display device having a plurality of pixel sets each of which is composed of at least three pixels arranged in correspondence to at least three color light beams of respective different wavelengths. The projection optical system includes a projection lens formed so that lateral chromatic aberration for a color light beam having a wavelength longer than that of a predetermined color light beam has the same sign as that of lateral chromatic aberration for a color light beam having a wavelength shorter than that of the predetermined color light beam.

Abstract: Disclosed are a projector and the protector thereof having superior safety and practicality. The projector for projecting an image on a screen comprises sensors for performing detection in an area to be subjected to detection that is a local space. The local space is located on the outside of a projection space area which projecting light passes through, and extends along an outer edge of the projection space area. When the sensors detect an object in the area to be subjected to detection, a general controller of the projector turns off a power source of a lamp unit that is a light emitting source, and thus the general controller causes the projector to stop projecting. This prevents damage to the eyes of a person who carelessly looks into a projection lens.

Abstract: A color projector for correcting chromatism by changing the sizes or positions of three display devices with respect to each color is provided. In the color projector, two or more display devices selected from the first through third display devices have different sizes of effective areas where an image is formed such that chromatism generated while lights of different colors synthesized by the synthesizing device pass the projection lens unit can be corrected. Also, the distances between two or more display devices selected from the first through third display devices and the projection lens unit are different from one another such that chromatism generated while lights of different colors synthesized by the synthesizing device pass the projection lens unit can be corrected.

Abstract: An output light from an light source lamp unit 8 in a projection-type display apparatus illuminates liquid-crystal light valves 925R, 925G and 925B for three colors via an integrator optical system 923. A superimposing lens 930 that is a component of the integrator optical system 923 as a uniform illumination optical system is arranged such that the mounting position of the superimposing lens 930 is fine-adjustable in a direction orthogonal to an optical axis 1a. By fine-adjusting the mounting position of the superimposing lens 930, the position of an illumination area B is adjusted such that the illumination area includes the image forming area A of the liquid-crystal light valve. It is not necessary to assure a wide margin around the image forming area A to cover the offset of the position of the illumination area B. As a result, the utilization of illumination light is heightened and a bright projected image results.