255 results about "Video projector" patented technology

A video display for two or three dimensions has a flat liquid-crystal screen which ejects light from the plane at a selectable line. One or, in the case of a 3-D display, several video projectors project a linear image into the plane from an edge. A complete image is written on the screen by addressing the line with appropriate images as it is scanned down the screen. To screen a three-dimensional image, the video projectors, each projecting an image as seen at a slightly different angle, combine to constitute a three-dimensional display which produces a three-dimensional image that is one line high.

The present invention is directed to an apparatus and method for displaying 3D images. The apparatus comprises: a) a screen with angular dependent diffusion characteristics for direction selectively forwarding light; b) a screen illuminating system, the screen illuminating system comprising multiple modules for generating multiple light beams incident on points of the screen, the modules being arranged so that each point of the screen is illuminated by multiple modules, and the incident light beams generated by one module are projected into multiple different directions from the module towards multiple different points of the screen, and further the different incident light beams generated by one module are forwarded towards different emitting directions from the screen, means for coding each incident light beam with the image information of a single image point in the module, where the 3D image perceived by an observer being generated by multiple modules; c) a control system to control the modules; and d) means for imparting an exit divergence to the exiting light beams being transmitted through or reflected from the screen, the measure of the exit divergence substantially corresponding to the angle between neighbouring emitting directions associated with the optically neighbouring modules, go as to provide a substantially continuous motion parallax in the 3D image perceived by an observer. The apparatus according to the invention comprises imaging means for generating the incident light beams with a convergent section converging substantially towards a point of the screen, where a convergence of the incident light beams is substantially equal to the exit divergence of the light beams exiting the screen. The modules can be video projectors, LED projectors, the optical engines of these, or the like, arranged periodically shifted, preferably in the horizontal direction and the diffuser screen is realised as a holographic screen, arrays of diffractive or refractive elements, retroreflective surfaces, or any combination thereof, for imparting a larger divergence to the exit light beams along at least one, preferably in the vertical direction, while in the other direction the angle of divergence provided by the screen is smaller than the angle between the neighbouring emitting directions associated with the optically neighbouring modules. The invention is also directed to a method implemented by the apparatus according to the invention.

A system for correcting the intensities of pixels supplied to a projector. An image generated by the projector has a number of regions formed by the overlapping of the image with one or more other images generated by one or more other projectors. The system includes: a first unit configured to generate a horizontal scaling value; a second unit configured to generate a vertical scaling value; a first multiplier configured to multiply the horizontal scaling value and the vertical scaling value to obtain a scaling coefficient, and a set of one or more additional multipliers configured to multiply components of an input pixel by the scaling coefficient to determine components for an output pixel. The first unit and second unit compute their respective scaling values in a way that allows for regions whose boundaries non-aligned in the vertical direction.

There is provided a system and method for controlling a tracking device to follow a location of a performer on a stage. The tracking device may comprise a lighting fixture such as a high output video projector or an automated mechanical moving light such as a DMX lighting fixture to provide a followspot, or a microphone to record audio from a particular performer. The method comprises capturing a video feed of the stage using a camera, presenting the video feed on a display of a control device, receiving input data indicating a position of the performer in the video feed, translating the input data into the location of the performer on the stage, and adjusting the tracking device to follow the location of the performer on the stage. The control device thereby provides lighting operators with an intuitive interface readily implemented using cost effective commodity hardware.

A voice-activated video display mechanism that projects or displays information on a screen during a presentation as controlled by a user's voice is disclosed. The preprogramed slides or pictures change in response to certain spoken words by the presenter. Such functionality permits seamless display of information that corresponds directly to the speaker's spoken word thus allowing for a presentation that is easier to comprehend and understand. Also, the projector has capabilities for the playback of DVD media, either as part of a presentation or as a separate standalone DVD viewer. A built in printer also allows for the production of hard copies of the displayed information.

A multi-camera high-definition or standard-definition switched video signal is distributed from the Point of Capture (POC) using industry standard technology for broadband distribution such as fiber optic or satellite, to a Point Of Display (POD) where multiple video projectors or displays integrated with a digital light show and high-end audio are utilized to provide a totally immersive entertainment environment. That environment is controlled using a graphically based tool called the LightPiano™, and is then extended through the festival atmosphere in the Club Annex, where licensed merchandise, auctions, and swap meets are located. Online Instant Messaging, Short Message System (SMS) text messaging, Chat, and Fan Clubs generate additional content, which is sent back to the POD. There is extensive use of the Worldwide Web for both local and remote access to the chat, fan clubs, SMS and instant messaging systems, as well as for online access for customers to view scheduling, and purchase ticketing, webcasts and archive access. The Web is also used by the venue owner to manage the entire system for booking, data mining, scheduling, ticketing, webcasting, and facilities management. The Web interface combined with the power of the LightPiano makes this complex interrelated system relatively easy and intuitive to operate. It significantly lowers the cost of operation and makes the system scalable to a large network of POCs and PODs. It allows one POC to feed many PODs, enabling a truly global distributed, immersive entertainment environment.

A video projector (1) comprises a light source (11) enclosed in a lamp box (12), an optical engine (100) including a color wheel (13), an optical tunnel (15), a mirror (16) and a DMD (Digital Micro-mirror Device) (17), and a blower fan (30a) disposed in the vicinity of the light source (11) and below the optical engine (100). The blower fan (30b) sucks air through a portion of the optical engine (100) where the optical tunnel (159 and so an are provided except the color wheel (13), generates a cooling air and exhausts a part of the cooling air toward the color wheel (13) and the rest of the cooling air toward the light source (11), so that the elements of the optical engine (100) and the light source (11) are cooled by the blower fan (30b) simultaneously.

Provided is an image projection system including a screen, an input terminal, an image processing unit, an image projector, and invisible light ray-shielding member, characterized in that: the screen has a pattern-printed sheet having reflection patterns for transmitting positional information by reflecting invisible light rays or absorption patterns for transmitting positional information by absorbing invisible light rays; the input terminal has an invisible light ray-applying portion, detects a reflected light ray of an invisible light ray, which is applied from the invisible light ray-applying portion and reflected from a specific site of the pattern-printed sheet, reads positional information of any one of the reflection patterns or any one of the absorption patterns, and outputs the positional information to the image processing unit; the image processing unit converts the positional information input from the input terminal into image information A, and transfers the image information A to the image projector; the image projector converts the image information A transferred from the image processing unit into visible light rays, and projects the visible light rays on the screen; and the invisible light ray-shielding means is placed in front of or inside the image projector, and removes the invisible light ray from the visible light rays to be projected. The present invention can provide the image projection system in which, even when a screen is large, the positional information of the screen can be simply input in a non-contact fashion with high accuracy, and image information converted from the input positional information can be further converted into visible light rays to be projected.

The aim of the invention is to provide a method and an arrangement for carrying out said method, by which means optical holograms and interactive computer graphics can be harmoniously and uniformly combined, so that all components can be recognised in an optically sharp and separate manner and the holograms can be represented in a modified manner, especially also partially accentuated. According to the invention, the hologram is illuminated by an illumination image projected by the video projector, a holographic wave front that can be seen by the observer is reconstructed therefrom, and computer graphics are simultaneously displayed on the screen. The invention also relates to a method for combining computer graphics with an optical hologram having a virtual content, using a partially transparent, optical element, a hologram, a monitor located on the side of the partially transparent element opposing the observer, and a video projector, the 3D holographic image of the hologram superimposing the image of the monitor.

A projector screen having a simple configuration, which provides a wide field of view angle and can be used for both transmission and reflection projection is achieved. A screen according to the present invention is provided with a directional scattering layer that scatters incoming light within a specific angular range and transmits incoming light outside the specific angular range. Further, an image projection system can be made by combining the screen with an image projector that projects an image onto the screen.

A video projector includes a display device which receives an image signal and generates image light projected onto a projection surface. A scaling processor scales the input image signal. An OSD processor generates and corrects an adjustment pattern image in accordance with a correction instruction on the projection surface. An image signal synthesizer combines the image signal processed by the scaling processor with an OSD image signal generated and corrected by the OSD processor to generate a combined image signal. A trapezoidal distortion corrector performs trapezoidal distortion correction on the combined image signal from the image signal synthesizer based on the correction of the adjustment pattern image on the projection surface. The adjustment pattern image generated by the OSD processor includes a reference quadrangle pattern and downsized quadrangle patterns, which are reduced in size from the reference quadrangle pattern.

A system in accordance with the invention includes an interactive video system that creates immersive multimedia experiences through responsive physical interaction and audience participation. The system transform floors, walls, screens, staging and other surfaces and video output devices into an interactive experience. Motion tracking and projection systems enable the combination of a background message to be manipulated in response to audience participation, including human body movements. Included within the system is a software application with a setup and programming user interface, used in conjunction with external hardware to which it is connected. External hardware includes, in one basic embodiment, one or more video projectors, one or more video cameras, and one or more computers. The computer receives input from the video cameras, and modifies the projected video based upon that input. A single system unit can be networked to other system units on a LAN, WAN, or global network.

High definition (HD) video may be sent from, e.g., a laptop computer on a table in a room to a video projector mounted on the ceiling using a 60 GHz high capacity (2.5 Gbps) wireless link. At this frequency and data rate, the signal is so short range and directional that low power may be used and the video may be transmitted in an uncompressed form such that so much data is transmitted each second that bootlegging the content is essentially untenable. No wiring between the HD video source and the HD video display is necessary.

A method and system for preventing a visual video copy being made of a projected image on a screen. In a theater or television or computer screen environment, an image is displayed on a screen by a film projector or a video projector or by the cathode ray tube or the LCD screen. A form of piracy is accomplished by copying the image on the screen with a video camcorder or camera. This invention seeks to produce visual presentations which invention inhibits off-screen copying by camcorders or cameras. A preferred embodiment of the invention comprises of recording means which records images at variable frame rates which rates are either pre-programmed or decided by the user of the means. The variation of the frame rates forms a rate sequence which is recorded simultaneously when the images are recorded. The rate sequence will be read by the display device when the recorded images are displayed such that the images are displayed at the frame rates at which they are recorded. An unauthorized attempt to record the image sequence off the screen without the rate sequence will only record images displayed at unsynchronized rates. It will be extremely difficult if not impossible for an unauthorized person to attempt to synchronize his recording means to the various frame rates of display when the frame rate variation is large. This will make the unauthorized duplicated copy virtually unwatchable.

An autostereoscopic display system includes a lenticular lens display screen that projects a plurality of views of a scene from its front surface. A plurality of video projectors are disposed to the rear of the display screen and focus on a convergence point of the display screen's rear surface. Imaging computers drive the video projectors, each having a memory storing a scene to be displayed on the display screen. Each computer renders the scene from a preselected viewpoint that may be different from the viewpoints of the other imaging computers.

An illumination device includes a light source, which emits light polarized in a single direction, and a beam splitting unit, which splits the polarized light into beams of polarized light at a given ratio. A switching unit switches light converters to convert the polarized light, which is split into a plurality of beams, into beams of colored light. The beams of colored light are combined to change the balance of color purity and light amount of the polarized light.