Abstract: A projector includes: a judging section that judges whether or not an event representing an instruction to project a message image containing a character string has occurred; a projection distance information generating section that generates projection distance information representing a projection distance when the event has occurred; a focus adjusting section that carries out focus adjustment for projection based on the projection distance information; and a projecting section that projects the message image after the focus adjustment is started.

Abstract: A projection type image display apparatus includes an image display element, a first lens group disposed in a light direction with respect to the image display element and configured to include a plurality of lenses, a second lens group disposed in a light direction with respect to the first lens group and configured to include a plurality of lenses, a reflection mirror, configured to reflect lights emitted from the first and/or second lens groups so as to project upon the screen obliquely, a first mounting base on which the first lens group is mounted, a second mounting base on which the second lens group is mounted, and a chassis configured to store the first and second lens groups, the reflection mirror, and the first and second mounting bases. The first mounting base is fixed at a bottom of the chassis, while the second mounting base is moveable.

Abstract: An image displacement module includes a base, a carrier, an optical element, a freely rotating shaft, a flexible shaft, and at least one actuator. The optical element is disposed on the carrier. The freely rotating shaft and the flexible shaft are in a same axis and located between the base and the carrier. The flexible shaft is capable of acting a force on the carrier along the axis, and the carrier is capable of moving along the freely rotating shaft relative to the base to release the force. The actuator is disposed between the base and the carrier. When the actuator drives the carrier to rotate in the axis relative to the base, the flexible shaft generates an elastic torsion. When the actuator does not drive the carrier to rotate in the axis relative to the base, the flexible shaft drives the carrier to reposition relative to the base.

Abstract: A projection module adapted to be disposed in an electronic device is provided. The electronic device includes a main body and the projection module disposed in the main body. The projection module includes a chassis, a light source, a light valve, a first lens group, and a second lens group. The light source and the light valve are disposed on the chassis. The first lens group is fixed on the chassis. The second lens group is slidably assembled on the chassis and is disposed between the light valve and the first lens group. The light source is capable of providing a light beam, and the light beam is capable of emitting through the light valve, the second lens group, and the first lens group in sequence.

Abstract: 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.

Abstract: A projection apparatus including an illumination system, a light valve, a first optical element, a first projection lens, and a second projection lens is provided. The illumination system is suitable to provide an illumination beam, and the light valve is disposed on a transmission path of the illumination beam. The light valve is suitable to convert the illumination beam into an image beam. The first optical element is disposed on a transmission path of the image beam. A portion of the image beam is reflected by the first optical element, and a remaining portion of the image beam passes through the first optical element. The first projection lens is disposed on a transmission path of the image beam passing through the first optical element, and the second projection lens is disposed on a transmission path of the image beam reflected by the first optical element.

Abstract: A projector includes a light source device, a light modulation device, and an exterior casing. The projector is arranged so as to be installed in a desktop mount position and a ceiling suspension position. The light source device includes an elliptic reflector having a nearly ellipsoidal reflection surface and converging and outputting a luminous flux radiated from a light source lamp in a certain direction, and a parallelizing lens that parallelizes the converged light of the elliptic reflector, and a lens supporting part that supports the parallelizing lens and makes a position of the parallelizing lens relative to the light source device main body changeable according to the position of the projector is provided.

Abstract: A focus control device for a beam projector allows the focus of a lens assembly to be finely and easily controlled. The focus control device includes: a control member rotatably mounted on the beam projector for controlling the focus of a lens assembly; a rotary eccentric member provided in the control member, the rotary eccentric member having a control axis eccentric to the rotary axis of the control member, and being rotated while depicting an elliptical trace in response to the rotation of the control member; a focus guide member provided in the rotary eccentric member, the focus guide member allowing the lens assembly to be moved rectilinearly in the direction of an optical axis in response to the rotation of the control member; and an actuating member provided in the lens assembly and coupled to the focus guide member, the actuating member moving the lens assembly in the direction of the optical axis in response to the movement of the focus guide member.

Abstract: A projector includes: a display device which modulates illumination light; a projection lens which projects modulation light produced by the display device; and a holding device which has a holder member supporting the display device, a frame member supporting the projection lens and functions as a base capable of supporting the holder member, and an expanding and contracting member disposed between the frame member and the display device, wherein a temperature coefficient for the expansion and contraction of the expanding and contracting member in the direction of the optical axis of the projection lens corresponds to a temperature coefficient for the increase and decrease of the focal distance of the projection lens.

Abstract: A projector capable of adjusting brightness and brightness uniformity includes a light module, a light pipe, a first lens module, a second lens module and an image module. The light module generates a light ray. The light pipe includes an entrance and an exit. The light ray is converged onto the entrance of the light pipe and outputted through the exit of the light pipe. The first lens module has a first focal surface, which overlaps the exit of the light pipe, and receives the light ray outputted through the exit of the light pipe. The second lens module has a second focal surface and receives the light ray outputted through the first lens module. The image module is disposed on the second focal surface of the second lens module and receives the light ray outputted through the second lens module.

Abstract: A projection device, having an optical engine device and an adjusting device is provided. The optical engine device has an optical engine and a fixing device coupled to the optical engine. A first thread hole is formed in the optical engine along a Z-axis direction. An image is projected parallel to the Z-axis. The adjusting device further has an adjusting frame in which a second thread hole is formed along the Z-axis direction and an adjusting bolt screws through the second thread hole and the first thread hole. The operation of the adjusting bolt, the fixing device as well as the optical engine is moved relatively to the adjusting frame along the Z-axis. Thereby, the optical engine has a built-in adjustment mechanism to ensure the focal length maintained as the design value after assembly, such that the image quality of the projection device is enhanced.

Abstract: Described herein are devices that provide projection-type video output in a portable design. The projection-type display devices include a battery that stores electrical energy. The battery increases display device portability and flexible usage by permitting display device operation in locations not serviceable by a fixed power supply. For example, inclusion of a battery extends projector-type display device usage into a car, library, remote environment, or any other setting where fixed power outlets are not readily available or within power cord reach. To increase device endurance from a finite battery power supply, the present invention may also implement one or more hardware designs that reduce power consumption.

Abstract: 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.

Abstract: A projector includes: an operating panel having a plurality of operating buttons which carry out various operations, is exposed in the external surface of an exterior housing; a projection optical device configured to project an image light into which an incident luminous flux has been modulated in accordance with image information; an image adjustment section configured to change the relative positions of a plurality of lenses configuring the projection optical device; and an image adjustment panel having image adjustment buttons which cause the image adjustment section to operate, wherein the image adjustment panel is disposed in a position independent of the operating panel.

Abstract: A wide-angle projection zoom lens includes, in order from the magnification side: a first group that remains stationary during zooming and has a negative refractive power; second to fourth groups that are movable independently from each other during zooming; a fifth group that remains stationary during zooming and has a positive refractive power. The projection zoom lens is configured to be telecentric on the reduction side. The first group includes five lenses having negative, negative, negative, positive, negative refractive powers. During zooming from the wide-angle end to the telephoto end, the first group and the fifth group remain stationary, and the second to fourth groups are movable in a direction of the optical axis so as to narrow a space between the first group and the second group and widen a space between the fourth group and the fifth group.

Abstract: A projection apparatus including a projection body, a support and a pivoting member is provided. The support is disposed underneath the projection body. The pivoting member serves as a pivot between the projection body and the support, and both sides of the support are supported on a supporting surface. The projection body is suitable for swinging with the pivoting member as a pivot and therefore users are able to quickly adjust the degree of elevation and inclination of the projection body.

Abstract: A projector device, includes: a projector unit, including a light source and a projection lens whose focal position is variable, that projects an image upon a projection surface with a light flux outputted from the light source that passes through the projection lens; an image-capturing unit, including a photographic lens whose focal position is variable, that captures an image of a subject with a light flux from the exterior that passes through the photographic lens; and a single drive source that generates drive force for changing both the focal position of the projection lens and the focal position of the photographic lens.

Abstract: A system and method of multi-directional projection in which the optical output from a projector is modified in response to characteristics of nearby surfaces, upon which projection can be directed. The multi-directional projection system can provide beneficial output as a primary indicator or a secondary indicating device that can be controlled by itself or synchronously with other devices, such as output from a computer monitor. One implementation incorporates an optical sensor coupled to the projector for registering object characteristics (e.g., distance, reflectance, texture, color, and ambient lighting), such as during a mapping operation performed across the pan and tilt range of the projector. The projection system preferably incorporates a focusing assembly and may include other controllable optical elements such as zoom. Control is preferably provided through commands within an application programming interface (API), such as executing on a personal computer or other form of computer device.

Abstract: An image offset adjustment apparatus for an LCD projector which is constructed to enable the adjustment of an image offset. The LCD projector includes a light source for emitting light, mirrors, and an LCD installed in front of the mirrors so that an image generated in the LCD is enlarged and projected on a screen. The image offset adjustment apparatus includes a projection lens section including a plurality of projection lenses having their respective LCDs at different circumferential positions to have different image offsets; a lens housing for housing the respective projection lenses adjacent to one another in a circumferential direction; rotation means for rotating the lens housing; and a controller for controlling the rotation means so that the lens housing can be controllably rotated to select one of the projection lenses and one of the image offsets as desired by a user.

Abstract: 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.

Abstract: A projection optical unit for obliquely projecting an image displayed on an image display element upon a projection surface, enlargedly, comprises: a lens group, being disposed neighboring to the image display element, and including a plural number of projection lenses therein; and a reflection mirror for reflecting lights emitting from the lens group, to be projected onto the projection surface, obliquely, wherein assuming that a light beam, emitting from a center of the display screen of the image display element, passing through a center of an entrance pupil of the lens group, and entering into a screen center on the projection surface, is a screen center light beam, then the screen center light beam is incident upon the projection surface, obliquely, with respect to a normal line thereon, the lens group comprises a front lens group including a plural number of refraction lenses, being disposed thereafter directing from the image display element to the projection surface and having rotationally symmetric s

Abstract: Disclosed is a focusing device for a beam projector, which includes an adjustment member mounted on a housing of the beam projector to be linearly movable, a pivoting member rotatably mounted on the housing, a link member extending from the pivoting member at a point separated from a rotation axis of the pivoting member, and a lens assembly mounted to be linearly movable within the housing while interfering with the pivoting member, in which the link member rotates the pivoting member according to the linear movement of the adjustment member and the lens assembly linearly moves within the housing according to the rotation of the pivoting member. The focusing device can perform fine focusing and adjust the focusing distance without using a gear or motor to make the beam projector compact and mount the beam projector on the portable terminal.

Abstract: A projector includes: a light source; an image processing section adapted to perform an expansion process of an aspect ratio in either one of a horizontal direction and a vertical direction of an image to be formed by an image signal input; a light modulation element adapted to modulate light from the light source to form an image on which the expansion process is performed; a projection optical system adapted to project the image, formed by the light modulation element, on a projection surface; and an anamorphic zoom optical system adapted to be capable of changing a magnification ratio of the image with respect to a direction different from a direction, along which the expansion process is performed in the image processing section, out of the horizontal direction and the vertical direction.

Abstract: 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.

Abstract: A light emitting system is disclosed, including a light generator, a complex lens and an activating unit. The light generator provides a light beam emitted in a first direction in parallel to an optic axis. The complex lens, disposed on a path of the light beam, includes a plurality of micro structures for refracting the light beam. The activating unit includes an activating member coupled to the complex lens. The activating member activates the complex lens with an activation frequency to reciprocally move in a second direction alternate to the first direction. By the disposition of the complex lens, the energy of the light beam is uniformly distributed. Additionally, speckle produced by the light beam is reciprocally moved within an area by the activating unit, creating a photogene reaction, to successfully eliminate existence of the speckle.

Abstract: A projector includes: a light valve configured to modulate light emitted from a light source according to image information to form image light; a support and drive unit configured to support a projection lens for projecting the image light formed by the light valve such that the projection lens can be replaced, and shift a mounted lens as the supported projection lens in a first direction within a plane perpendicular to a system optical axis of the entire projector; and a control unit configured to determine information concerning an allowable range of the shift of the mounted lens in the first direction, and control the operation of the support and drive unit such that the shift of the mounted lens lies within the determined allowable range.

Abstract: A projection-type image display apparatus for projecting an image, enlargedly, onto a projection surface, comprises: an image display element; a lens group, being disposed behind the image display element, comprising therein, a front lens group made up with a plural number of lenses, including, at least, a refractive lens, having a positive power and being rotationally symmetric in a surface configuration thereof, and a rear lens group made up with a plural number of lenses, including, at least, a lens having a free curved surface configuration and being rotationally asymmetric, thereby emitting the image displayed on the image display element; a reflection mirror for reflecting the light from the lens group, thereby projection onto the projection surface, obliquely; and a movement member for moving the plural number of lenses of the rear lens group.

Abstract: A projection-type image display apparatus for projecting an image, enlargedly, onto a projection surface, comprises: an image display element; a lens group, being disposed behind the image display element, comprising therein, a front lens group made up with a plural number of lenses, including, at least, a refractive lens, having a positive power and being rotationally symmetric in a surface configuration thereof, and a rear lens group made up with a plural number of lenses, including, at least, a lens having a free curved surface configuration and being rotationally asymmetric, thereby emitting the image displayed on the image display element; a reflection mirror for reflecting the light from the lens group, thereby projection onto the projection surface, obliquely; a first mounting base, on which the rear lens group is mounted; and a rod member, which is provided on the mounting base for moving the mounting base.

Abstract: A projection image display apparatus has a front panel, a projection lens, a lens hood, and a lens dial. The front panel has an opening for the projection lens. The projection lens projects through the opening for the projection lens. The lens hood covers the projection lens circumferentially, and has an opening spaced from an end of the lens hood for a dial. The lens dial is provided for adjusting focusing or zooming. It is provided at a circumference of the projection lens and exposed through the opening for the dial. The apparatus can thus avoid dust or the like foreign matters otherwise entering from a top side thereof into its main body, and also protect the projection lens when the apparatus is carried and inadvertently has a projection lens unit brought into contact with a desk or the like.

Abstract: A projector includes an image forming device, a projection lens for projecting an image produced by the image forming device, and an external case which accommodates the image forming device and at least a part of the projection lens and has an opening through which a light emission end of the projection lens is exposed. The projection lens has a lens barrel and a plurality of lenses equipped within the lens barrel. The lens barrel has a fixed part and a movable part. A turn table for shifting the movable part of the lens barrel in the direction of the optical axis of the projection lens is provided. The direction of the rotation axis of the turn table is substantially perpendicular to the optical axis of the projection lens. The top surface of the turn table is exposed through the outer surface of the external case.

Abstract: A projection-type display apparatus that projects an image toward a projection surface and displays the image thereon, the apparatus includes: a projecting section that includes a focal length adjusting mechanism and projects an image; an adjustment image controlling section that uses the projecting section to project a guide display image suggesting how to adjust the position where the projection-type display apparatus is installed and uses the projecting section to project a calibration image having a predetermined shape when the guide display image is projected; a projection distance measuring section that measures a projection distance that is the distance to the projection surface based on a captured image obtained by capturing the calibration image; and a focus adjusting section that operates the focal length adjusting mechanism based on the projection distance to perform focus adjustment so that the displayed guide display image is brought into focus.

Abstract: A projection image display device includes a light source; an illumination optical system that uniformly irradiates a surface of an image modulating element (primary image surface) with a light beam emitted from the light source; and a projection optical system that performs with respect to a screen (a secondary image surface) extended projection on image information provided at the primary image surface and modulated by the image modulating element. The projection optical system includes a first optical system having a positive refractive power, and a second optical system having a concave reflecting surface. The first optical system has a common optical axis at which all optical components of the first optical system have rotationally symmetric surfaces, and a screen shift function that causes the secondary image surface to be moved by moving at least one of the optical components of the first optical system substantially perpendicularly to the optical axis.

Abstract: A projector which projects an image onto a projection surface, and displays it thereon, includes: a light source; a light modulator which modulates light from the light source into an image light representing the image; a projection optical system which projects the image light modulated by the light modulator onto the projection surface; a keystone distortion correction section which carries out a keystone distortion correction process for correcting a keystone distortion of the image projected onto the projection surface; a detection section which detects a stop of a movement of the projector; and a control section which, on the stop of the movement of the projector being detected in the detection section, causes the keystone distortion correction section to start the keystone distortion correction process in accordance with a relative positional relationship between the projector after being moved and the projection surface.

Abstract: Described herein are devices that provide projection-type video output in a portable and flexible design. The design includes a projection chamber, a base, and an interface that permits relative positioning between the projection chamber and base. The base maintains the position of the display device. The projection chamber includes components responsible for the production of images based on received video data and components responsible for the projection of those images. Relative pointing between the projection chamber and base allows the projection chamber to be pointed—and an output projected image to be positioned—with minimal effort.

Abstract: A display apparatus adapted to generate image data for controlling a first light modulation section adapted to project a first window, and image data for controlling a second light modulation section adapted to project a second window smaller than the first window and projected so as to overlap with the first window, includes: a first image conversion section adapted to convert a resolution of input image data in accordance a resolution of the first light modulation section to form the image data for controlling the first light modulation section; and a second image conversion section adapted to extract data included in a range corresponding to a resolution of the second light modulation section among the input image data to form the image data for controlling the second light modulation section.

Abstract: A projection-type display apparatus includes an illumination optical system (1) including a light source, a reflection-type light valve (2) having an image forming area on a to-be-illuminated surface illuminated by the illumination optical system (1), and a projection optical system (3) that projects an image formed on the image forming area of the reflection-type light valve (2). The projection optical system (1) is shiftable in a direction approximately perpendicular to a projection optical axis. An F-number of the projection optical system (3) is smaller than an F-number of the illumination optical system (1). Between the projection optical system (3) and the reflection-type light valve (2), an opening defining member (12) that defines an incident side opening of the projection optical system (3) is provided, which is not moved by the shifting of the projection optical system (3).

Abstract: A transportable projector includes a focus adjustment unit for moving a focus lens in a projection lens, an acceleration sensor for detecting acceleration in a direction along an optical axis of the projection lens in the projector, a determination unit for determining whether the projector is in a stationary state or in a moving state in accordance with an output of the acceleration sensor and for respectively determining the direction to which the projector has moved and the distance that the projector has moved in accordance with an output of the acceleration sensor, and a control unit for controlling movement of the focus lens by the focus adjustment unit in accordance with the determined direction and the determined distance of the projector.

Abstract: The invention provides an imaging module disposed on a projection system. The imaging module comprises an extended lens device, which connects to the image outlet of the body of the projection system by a rotation mechanism. By rotating the rotation mechanism, the projection system may optionally project images through the extending lens device onto the screen in two perpendicular directions, of which the image ratio of the two images are reciprocal.

Abstract: A highly precision, super stable, structure compact and fully lockable ball joint mechanism optical mounts are presented. Both stationary plate and movable plate have a partial-spherical hole or conical hole. Facing spacing aligns the bases of the partial-spherical holes or conical holes; a space adjustable cavity is formed. An external-spherical circumference shape optical element carrier plate fits and mates in the space adjustable combined cavity forms a ball joint mechanism, or an external-column circumference and edges chamfered optical element carrier plate fits and mates in the space adjustable combined internal-spherical shaped cavity forms an angle tilt-able and around axis swivel-able joint pair mechanism. A removable tooling for exporting a tilting and rotating movement to the optical element carrier plate are presented. Locking ring pushes the movable plate to adjust the combined cavity and locking the optical element carrier plate and to lock optical element that is carried thereby.

Abstract: A handheld projector includes a housing, a projection lens module defining an optical axis, and an adjusting member movably mounted inside the housing. The projection lens module includes a sleeve, an outer barrel fixing the sleeve therein, an inner barrel received in the outer barrel, and a projection lens received in the inner barrel. The sleeve includes a first sidewall defining a guide groove angled relative to the optical axis. The outer barrel includes a second sidewall defining at least one cam groove angled relative to the optical axis. The projection lens includes at least one cam follower corresponding to the cam groove. The adjusting member includes a first surface facing the projection lens module. A guide post extends from the first surface corresponding to the guide groove. Each cam follower is plugged into the corresponding cam groove. The guide post is plugged into the guide groove.

Abstract: A lens-adjusting module includes a base, a tray movably disposed on the base, a lens fixed at the tray, and an adjusting device including a casing, a worm, a transmission gear, and a transmission element. The casing is fixed at the base. The worm is pivoted at the casing. The transmission gear is pivoted at the casing and geared to the worm. The transmission element is fixed at the transmission gear and connected to the tray. When the worm rotates such that the transmission gear rotates, the transmission gear drives the transmission element such that the tray moves relatively to the base along an axis. The disposition of the elements of the lens-adjusting module may satisfy a designing requirement of a designer for space planning.

Abstract: A handheld projector includes a housing, a projection lens module having an optical axis and a focusing member fixed inside the housing. The projection lens module includes an inner barrel fixed inside the housing, an outer barrel sleeving the inner barrel, and a projection lens received in the inner barrel. The outer barrel includes a first sidewall. At least one cam groove is defined in the first sidewall. A guide bar extends from the first sidewall. The projection lens includes cam follower corresponding to the cam groove. The focusing member includes a body portion with a first surface facing the projection lens module. A guide groove is defined on the first surface corresponding to the guide bar. The guide groove is tilted relative to the optical axis. Each cam follower is plugged into the corresponding cam groove. The guide bar is plugged into the guide groove.

Abstract: A projection type video display apparatus having a projection lens opening (3) formed in the front end (1a) of the apparatus and a lend adjustment opening (5) formed in one end adjacent the front end, both openings protected against dust and external mechanical shocks. The projection type video display apparatus is adapted to project an image that is generated by modulating light emitted from a light source based on video signals, through a projection lens unit (2) exposed in the projection lens opening (3). The apparatus comprises lens adjustment members (e.g. adjustment dial 4) for zooming and/or focusing the projection lens unit (2), and a cover mechanism (slide cover 7) for opening and closing the projection lens opening (3) and lend adjustment opening (5).

Abstract: A projector has a case, a zoom lens, a zoom ring, a control plate, a lodging element, a control rod, and a handle. The case has an opening, and the zoom ring is disposed within the case and nearby the opening, the zoom ring is moved back and forth to drive the zoom rod. The control plate is mounted on the case and laid over the opening movably, the lodging element is movably contacted with the control rod, wherein the handle accepts the force along the extending direction of the rectangular opening so as to let the control plate move the lodging element along the extending direction of the rectangular opening and further to move the control rod for continuously regulating the focal length of the zoom lens.

Abstract: A projector which projects projection light representing an image onto a projection surface, includes: a focus adjusting unit which shifts focus of the projection light according to operation by a user; an adjustment image projecting unit which projects an adjustment image containing a portion representing a predetermined pattern by the projection light; an imaging unit which shoots the projection surface to which the adjustment image is projected; a specifying unit which specifies a focusing condition of the focus on the projection surface by analyzing image data that is shot by the imaging unit; and a condition indicating unit which displays the specified focusing condition.

Abstract: A video display system which combines image processing and an anamorphic lens which displays television, HDTV wide-screen format images, and Cinemascope theatre video in a constant vertical height automatically with no resolution lost to black stripes on the top and bottom of the screen that contain no picture information.

Abstract: A projection type video display apparatus having a projection lens opening (3) formed in the front end (1a) of the apparatus and a lend adjustment opening (5) formed in one end adjacent the front end, both openings protected against dust and external mechanical shocks. The projection type video display apparatus is adapted to project an image that is generated by modulating light emitted from a light source based on video signals, through a projection lens unit (2) exposed in the projection lens opening (3). The apparatus comprises lens adjustment members (e.g. adjustment dial 4) for zooming and/or focusing the projection lens unit (2), and a cover mechanism (slide cover 7) for opening and closing the projection lens opening (3) and lend adjustment opening (5).

Abstract: An image display apparatus and an image display method, by which a desired image formation state on a retina can be constantly maintained, are provided.

Abstract: A lens adjusting device including a frame, a lens, a base, at least a positioning structure, and a locking device is provided. The lens is fixed on the frame. The base has a through hole with a predetermined shape formed thereon. The positioning structure is disposed on the base for movably positioning the frame on a plane above the base. The locking device including a screw, a nut, and a fixer is capable of fixing the frame to the base. The screw penetrates the frame and extends to below the base through the through hole of the base. The size of the through hole is greater than the size of a corresponding cross-section of the screw. The nut is disposed below the base and assembled to the screw to position the screw on the base. The fixer is disposed on the frame to constrain the rotation of the nut.

Abstract: An output light from an a 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.