Abstract: A three-dimensional display system (10) comprises a display housing (24) and a plurality of projectors (12) for projecting two-dimensional images (102) into a space, each projector (12) having means to adjust the distance between the projector (12) and the projected image (102), and each projector (12) being pivotally mounted to the display housing (24), for adjusting the horizontal and vertical position of the projected two-dimensional image (102) with respect to the projector (12). The display provides a high-resolution, three-dimensional multi-colored image which can be touched safely by the viewer. The display may be respond to physical objects in the display area by altering the image. The display may be used to operate a computer and browse the world wide web.

Abstract: An image display device includes: a laser light source having a plurality of emitting sections arrayed in a predetermined direction; and a light modulation device that includes an illumination region extending in a longitudinal direction and a lateral direction, and that modulates the laser lights emitted from the laser light source in accordance with an image signal. In the image display device, the predetermined direction in which the emitting sections are arrayed coincides with the longitudinal direction of the illumination region of the light modulation device.

Abstract: Slides are selectively presented via a slide presentation system based upon a priority level assigned to a slide presentation. The assigned priority level indicates which of the slides to selectively present and includes a first priority level of at least two priority levels associated with the slide presentation. A request is received during the selective presentation of the slides, via an input device associated with the slide presentation system, to change the priority level assigned to the slide presentation to a second priority level of the at least two priority levels. The remaining slides of the slide presentation are selectively presented via the slide presentation system based upon the second priority level. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

Abstract: An optical system comprises a first image capture device for capturing an image of an observation area, a first display device, a semi-reflecting plate, a concave mirror disposed facing the first display device, and a second display device for displaying a background image. A light beam is scattered by the first display device through the semi-reflecting plate and then reflected by the mirror and the semi-reflecting plate in order to display an aerial image between the semi-reflecting plate and the observation area. A projector projects a light beam toward one of the display devices. The first image capture device is adapted to capture the image of the observation area via said one display device. A alternating control device alternates capture of an image of the observation area by the first image capture device and projection of the light beam projected by the projector.

Abstract: To provide a projector apparatus capable of giving attention stably and clearly to a specific area within an image projected and displayed on a screen, and to provide a display output method and display output program of the apparatus. For that purpose, the projector apparatus for projecting and displaying an image on a screen comprises an input section which accepts an indication of a specific area within the projected and displayed image; and an image processor that subjects a specific area and/or an other area within the image to image processing for emphasizing the specific area, the other area being an area other than the specific area in the image.

Abstract: A briefing system is used to project images onto a projection screen to form a projection picture. The briefing system comprises a pointer, a projector and a computer electrically connected to the projector. The computer outputs an image signal to the projector. The projector projects an image corresponding to the image signal onto the projection screen to form the projection picture. The indicator is used to project an indication point. The projector also captures the image of the projection picture and the indication point and transfers the image to the computer. The computer then calculates a location where the cursor on the computer screen should reach according to the location of the indication point on the projection picture and moves the cursor on the screen to there.

Abstract: According to one embodiment, a projection display device includes a panel which modulates outgoing light from a light source by an image signal, a projection lens which projects image light outgoing from the panel, an imaging unit which converts an optical image entered via the projection lens to the image signal, and a control unit which selectively forms a first light path in which the image light outgoing from the panel is guided to the projection lens, and a second light path in which the optical image entered via the projection lens is guided to the imaging unit.

Abstract: This invention provides systems and methods that allow a user to change the size of a background used with a graphics-based user interface. This enables tailored background sizes based on user preference and allowable conditions, which are particularly useful with display devices having a large display area. By custom sizing a background to current conditions, a user may navigate an image among obstacles at a receiving surface and obstacles along a projection path between a projection lens and receiving surface. In addition, a user may customize the background size on a large LCD screen according to more suitable dimensions for an image used in the background or to a personal preference, thereby creating a personalized look and feel for the graphics-based user interface. One embodiment of the present invention defines a usable area for a graphics-based user interface according to the current size of the background.

Abstract: In an image processing apparatus including an image reading section, an image processing section to distinguish an area where a document exists from an area where the document does not exist according to an output of the image reading section on the basis of an area recognition threshold value, and a document erasure device to erase an output image for an area on a recording material corresponding to the area where the document does not exist, a selector automatically selects either a rectangle erasure function in which an area inside a minimum quadrilateral including the document is made a document area or an oblique angle erasure function in which the document area is formed by both edges of each primary scanning line of the document read by the image reading section, on the basis of a rectangle erasing threshold value and a document background level value.

Abstract: The presentation support system comprises a projector that displays presentation images utilized in a presentation, a presentation support device that produces support information for supporting the presentation according to the progress status of the presentation, and a support information display device that displays the support information. The projector is equipped with a support controller that supplies the support information display device with the support information supplied from the presentation support device.

Abstract: A system for adjusting the color of a light source comprises a first polarizer to polarize the light source, a fixed retarder with its optical axis at a first angle to the polarized light, an electronically variable retarder with its optical axis at a second angle to the polarized light and a second polarizer to polarize the resultant light. This light source may be used where light of adjustable color is needed, for example in a theatrical spotlight or a liquid crystal projection system.

Abstract: An electronic transparency device is provided with a memory in which a plurality of frames of video data ("slides") can be stored. The apparatus includes a control microprocessor which can cause predefined sequences of slides to be presented on the LCD panel automatically. These slide "shows" are defined by the user using a hand held remote control unit in conjuntion with menus displayed on the LCD panel in window fashion by the microprocessor. The user can specify the duration that each slide in a sequence is to be shown, the video transition by which it is to be introduced, the degree of "windowshading" with which it is to be displayed, etc. Once a show is defined, it can be instituted and controlled from the remote control unit. Among other numerous features, the transparency also includes a pointer that can be superimposed on the display and controlled by the remote control unit. This pointer can be used to define certain portions of the screen that are to be displayed in highlighted fashion.

Abstract: A slide projector has a light table oriented at 60.degree. to a generally horizontal base and connected thereto by a detachable connector. The light table has a tray mounted thereon for movement into mutually orthogonal directions parallel to the plane of the light table and supported by a counterweight, the tray receiving a planar slide holder whose slides and windows are alignable with a window in the light table. A projection lamp is located at the front side of the window while the projection optics are located at the rear side of the window.

Abstract: Diapositives are mounted in a strip formed by a pair of flexible sheet members each having at least two picture openings therein in side-by-side relationship and the sheet members are fastened to each other in face-to-face relationship mutually offset by a single picture opening. The frame is interposed between the sheet members and a diapositive is moveably positioned within an opening in the frame. The thickness of the frame is greater than that of the diapositive so that a diapositive is freely moveable within a frame opening and has play between the sheet members. An apparatus for projecting the strip mounted diapositives is provided with a pair of cassettes one of which contains a strip in which the diapositives are mounted and the second cassette contains a strip without any diapositives. The ends of the strips are automatically connected to each other for successively introducing the diapositives into the apparatus.

Abstract: A slide previewer/sorter/stack loader having a holder (18) which is adapted to receive two photographic slides in first and second receptacles at one end thereof. The holder is initially positioned at an angle above horizontal so that a first slide placed on a chute (16, 17) will drop into the first receptacle by force of gravity. When in the initial position, the slide in the holder is illuminated by a back light so that the slide can be previewed through a window in the holder and edited. The holder pivots in such a manner that the second receptacle can be positioned over a slide slot (28) above a projector. Means (26) are provided to restrain the slide in the first receptacle during transit from the initial viewing position to the position wherein the second receptacle is positioned over the slide slot. A second slide in the projector is forced upward by the projector slide lifter mechanism into the second receptacle in the holder, and is retained therein by a latch (52).

Abstract: An overhead projector comprises a stage having at least two guide members fixed to its upper surface and movable longitudinally and transversely above a projector body, a file page having a plurality of slide films fitted therein in rows and columns and pairs of reference edges spaced apart at equidistances from crosswise and lengthwise center axes of the file page and adapted to abut against the guide members of the stage for positioning the file page relative to the stage, and positioning means for determining movements of the stage at determined intervals. The slide films in the file page are spaced apart at distances correspondingly equal to the movement distances determined by the positioning means. The projector is capable of correctly positioning a file page relative to the stage with ease after the file page has been rotated or turned upside down for changing over the projection methods of the projector, such as reflection projection and transmission projection.

Abstract: A system for previewing and projecting slides that are stored in spaced, co-planar relation in a planar holder is disclosed. The slides are previewed, either individually or in a group, in their natural orientation without removing the slides from the holder. Projection of the slides to form a naturally oriented image also is accomplished without removing the slides from the holder. In the preferred embodiment, means are provided for moving the planar slide holder orthogonally with respect to the optical axis of the projection system. A slide indexing system is provided to allow the projectionist to select a particular slide for projection. The slide indexing system utilizes cooperative means on the slide holder and projector to achieve indexing and, if desired, other control functions. In an alternative embodiment, the projected image plane is vertical and can be rotated about a vertical axis at the projector without moving the base of the projector.

Abstract: An illuminated optical viewer for facilitating corrective operations on an object comprises a work platform which can be moved along two mutually perpendicular coordinates and on which in use of the viewer the film negative or other object to be touched-up or to have any faults corrected will be positively located first optical means projecting an enlarged objective image of a small area of the object, located at one position, on to a screen, second optical means producing an enlarged stereoscopic virtual image of a portion placed at a second position displaced from said one position by a predetermined distance in a predetermined direction, said virtual image being formed in substantial alignment with the portion of the object at said second position, scanning means for adjustably moving the object along two co-ordinates of a plane, and two-position changeover means for so shifting the object as to displace an object portion which is located at said one position to said second position without affecting the a