Abstract: The present invention provides an optical device that achieves reduction in size, reduction in manufacturing costs, improved image quality, and so forth, by simplification and the like of a panel in prisms (POP) structure wherein light-modulating devices and a color synthesizing optical element are integrally formed. A POP structure is configured wherein pins integrally formed with a holding member are inserted through holes formed in the four corners of holding frames storing the liquid crystal panelsso as to fix the holding frames and holding members by adhesion. End faces of holding members opposite to the pins are fixed by adhesion to the side faces of bases fixed on the upper and lower faces of a cross-dichroic prism.
Abstract: A projector changes stepwise electric energy supplied to a light source based on temperature information which is detected by a temperature sensor. The temperature sensor detects the temperature of components of an optical engine or an ambient air temperature. A lamp output control circuit changes stepwise the electric energy supplied to the light source based on the temperature information detected by the temperature sensor.
Abstract: An optical projection system includes a first optical image projector that is configured to generate a first array of image pixels having a first pupil associated therewith. A second optical image projector is configured to generate a second array of image pixels having a second pupil associated therewith. An optical element is configured to superimpose the first and second pupils to create a single exit pupil.
September 19, 2002
Date of Patent:
March 29, 2005
Suresh Balu, D'nardo Colucci, Raymond L. Idaszak, Eric Knisley
Abstract: The invention provides a structure to attach a liquid crystal panel to a prism, which enables further enhancements in cooling capabilities. The structure includes a storing member fixed on a base and holding a holding frame, where a liquid crystal panel is held. Erected pieces to form a space to receive the holding frame are formed protruding on both left and right sides at the light incident side. Protrusions to form an air path with a cross-dichroic prism are formed on both left and right sides on the light emitting side. The liquid crystal panel is attached to the cross-dichroic prism through a holding member having an opening at a portion corresponding to the panel face of the liquid crystal panel.
Abstract: Improved methods and systems for routing and aligning beams and optical elements in an optical device include a multiplexing device and/or a demultiplexing device, which includes an optical alignment element (OAE). The OAE can be configured to substantially compensate for the cumulative alignment errors in the beam path. The OAE allows the optical elements in a device, other than the OAE, to be placed and fixed in place without substantially compensating for optical alignment errors. The OAE is inserted into the beam path and adjusted. This greatly increases the ease in the manufacturing of optical devices, especially for devices with numerous optical elements, and lowers the cost of manufacturing. The multiplexing and/or demultiplexing device can reside within a standard small form factor, such as a GBIC. The devices fold the paths of the traversing beams with a geometry which allows a small package.
July 26, 2002
Date of Patent:
February 15, 2005
Gigabit Optics Corporation
Jenkin A. Richard, Eric V. Chamness, David F. Moore, Steven J. Benerofe, Don A. Clark, Ryan D. Bruneau
Abstract: Provided are a micro mirror device capable of realizing color images without a color wheel by selectively reflecting color beams using a plurality of micro mirrors whose driving axes are positioned in different directions, and a projector employing the same. The micro mirror device can individually control a plurality of micro mirrors, the micro mirror device comprising a plurality of micro mirror units having micro mirrors whose driving axes are positioned at predetermined different angles, the micro mirror units for reflecting light incident in different directions.
Abstract: Disclosed are shutter apparatus provided with a shutter base plate having a shutter aperture, a first arm member which rotates around a center of rotation at a first axis, relative to the shutter base plate, a second arm member which rotates around a center of rotation at a second axis, relative to the shutter base plate, and a plurality of shutter blades, wherein each of the plurality of shutter blades is coupled to the first and second arm members, wherein the first and second arm members rotate around their respective axes whereby the plurality of shutter blades run over the shutter aperture, wherein each shutter blade has a blade main body portion extending in a direction perpendicular to a running direction thereof, and wherein a first shutter blade with a smallest running travel comprises a light shielding portion projecting in the running direction on the coupling portion side to the first and second arm members and arranged to effect light shielding of the shutter aperture, and also disclosed are shut
Abstract: A system for front projection of a continuous image onto at least two non-coplanar viewing surfaces includes a light source, an image source and a projection lens assembly. The light source, image source and projection lens assembly are disposed within a housing to project an image on a first viewing surface and at least one other viewing surface. An image continuity component has a first oblique projection compensator, at least one other oblique projection compensator and the oblique projection compensators are coordinated to project complimentary image portions in a continuous image.
Abstract: A shutter for a camera capable of opening a shutter sector in a reduced period of time includes a shutter opening formed in a shutter plate, shutter sectors for opening and closing the shutter opening, a drive lever having a drive pin for operating the shutter sectors, and an actuator for driving the drive lever. The drive pin penetrates through-holes formed in the shutter sectors. The through-holes have a size sufficiently large so that the drive lever is driven by the actuator substantially in a no-load state immediately after starting to drive the drive lever so that the shutter sectors are not moved until the drive pin has achieved sufficient acceleration.
Abstract: A light collection for an arc lamp includes a parabolic reflector having primary and secondary parabolic reflector sections, the secondary parabolic reflector section divided into subsections, resulting in multiple arc images. The light collection system combines high efficiency and etendue preserving aperture shaping, and is particularly useful in projection display systems.
Abstract: An overhead projector is provided which eliminates disturbing light on a projection screen (12) from parts of a picture plate (2) of the projector which surround a projected document (10) as well as light on the screen (12) which arises when documents are being changed on the picture plate (2). The picture plate (2) is covered with a first polarizing layer (3) which is a supporting surface for the document, by placing a second polarizing layer (9) in the path of the light close to a projector head (6, 7) and by arranging the polarization directions of the first and second polarizing layers (3, 9) perpendicular to each other so that light which first passes the first polarizing layer (3) where no document is placed and thereafter passes the second polarizing layer (9) is absorbed.
Abstract: In one aspect of the invention, what is provided is a camera body adapted to be joined to a cover having an outer electronic circuit with a set of electrical contacts, said contacts being positioned by the cover in relation to an aperture. The camera body comprises a primary electronic circuit with a set of electrical contacts adapted to engage the electrical contacts of the outer electronic circuit and to cooperate therewith to perform a set of camera functions when the set of electrical contacts from the outer electronic circuit is held against the set of electrical contacts from the inner electronic circuit. A post is aligned with the set of electrical contacts of the inner electronic circuit said post being adapted to engage an aperture in the cover so that as the cover is joined to the body, the set of electrical contacts from the outer electronic circuit is aligned with the set of electrical contacts from the inner electronic circuit.
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: A disclosed photographing apparatus has a LCD display, a select member, and a controller. The display displays information about a photographic condition, in arbitrary display form using a dot-matrix. The select member selects one display mode among a plurality of display modes. In each mode of the plurality of display modes, display forms are different to each other, standard information required for photographing is displayed common to every display mode, and at least one information inherent to each display mode is displayed. The controller controls the display to display the display mode selected by the selector, and at a time of starting the camera, to display a display mode which has been displayed when the camera was previously switched off.
Abstract: A motion picture code evaluation apparatus for evaluating an amount of motion picture information after transmission, the apparatus has a header inspection unit for inspecting a frame header and determining that whether the frame header is abnormal or not to calculate frame loss ratio every predetermined time, an extracting unit for extracting motion picture coding parameter from the frame header and detecting variation of the motion picture coding parameter in the predetermined time, and an amount-of-motion-picture-information calculating unit for summing the motion picture coding parameter and weight, which is based on the variation of the motion picture coding parameter, to calculate an ideal amount of motion picture information every predetermined time, in which an actual amount of motion picture information is calculated by multiplying the ideal amount of motion picture information by (1−the frame loss ratio).
Abstract: In a projector device, a plurality of light source each including a lamp and a reflection mirror are arranged in parallel in an opposing relation to each other with optical axes thereof being offset such that light fluxes from the light sources are compressed in the offset direction, respectively. The compressed light fluxes are reflected at right angles by orthogonal reflecting surfaces of a reflection member including reflection mirrors or reflection prisms to form a plurality of parallel emitting lights in one direction. The projector device includes a condenser portion for condensing the parallel emitting lights to a single emitting light flux. The light fluxes from the light sources are passed through a polarizer portion before the incidence on the reflection member or after the emission from the reflection member such that the light fluxes become linear polarized lights having polarizing directions coincident with polarizing directions of liquid crystal panels.
Abstract: An image projector system includes a cold light source, a projection lens, a slide retaining unit, and a liquid crystal module. The slide retaining unit is disposed between the cold light source and the projection lens, and is adapted to retain removably a projector slide between the cold light source and the projection lens when the image projector system is operated in a slide projection mode. The liquid crystal module includes a liquid crystal panel retained removably on the slide retaining unit between the cold light source and the projection lens to permit operation of the image projector system in a liquid crystal projection mode.
Abstract: An image projection apparatus including a light source for emitting a plurality of monochromatic color beams having different wave lengths; a first light transmit unit; a light switch unit having a plurality of mirrors for selectively deflecting the monochromatic color beams at a predetermined angle; a quadrangular beam generating unit for converting the reflected monochromatic color beams into quadrangular beams having certain ratios of length to height; a panel for receiving the converted quadrangular beams and forming a monochromatic color bar on at least one portion of upper, mid, and lower portions thereof; and a projection lens unit disposed opposite to the panel. Accordingly, by using the light switches, a monochromatic color bar is formed on single panel with the same utilization efficiency of light as that of three panels, thereby embodying a high image quality.
Abstract: A power-saving method with integrated photodiode light source. This device has a circuit board with a plurality of red, green and blue photodiodes as the device's light source. Additionally, a light control circuit is used to control light beam from the light source illuminating a reflector and then reflecting to a reflective display panel in order to reflect the light beam and generate an image. Thus, a projection module can project the image on a viewing plate. As cited, the inventive device includes: a light control circuit, a light source module, a polarizing beam splitter (PBS), a reflective display panel and a projection module.
November 18, 2002
Date of Patent:
April 27, 2004
Delta Electronics Inc.
Hsiao Yi Li, Hung Lung Cheng, He Chiang Liu
Abstract: An image synthesizing optical apparatus includes displays for modulating first, second, and third color beams according to image signals and outputting the first, second, and third color beams thus modulated. The optical axis of the second color beam coincides with the optical axis of the first color beam. The optical axis of the third color beam crosses a midpoint between the first and second displays on the optical axes of the first and second color beams. The apparatus has a color beam combining unit at the midpoint and combining the color beams from the respective displays, and a support supporting the foregoing components. The support maintains optical path lengths of the respective color beams from the displays to the color beam combining unit equal even with a change in temperature.