Abstract: A method for selectively accessing a projected image is provided. In one embodiment, the method may include requesting an image display device to transmit over a network a projected image as displayed by the image display device. The method further may include receiving a copy of the requested projected image from the image display device in response to the request over the network.

Abstract: A display screen is provided. The display screen may be configured to receive an image from a display device, and includes a first surface with a topography configured to transmit light from the image, and a second surface configured with light reflecting portions and light absorbing portions. The light reflecting portions may be configured to substantially reflect light transmitted from the first surface, and the light absorbing portions may be configured to substantially absorb environmental light.

Abstract: A projection system is provided with a controller equipped to drive light emitting devices of a light source of the projection system in a manner that enhances the operational life of the light emitting devices, the ability to provide peak white, and/or finer gray scale.

Abstract: A projection apparatus comprises a Light Emitting Diode (LED) and a cooling arrangement is described herein.

Abstract: Geographically distributed conference sites each have a telephone receiver and a dataconferencing appliance connected to a shared voice call network. Each site also has a display device for displaying images comprised of image data produced by an image source. The dataconferencing appliance is connected to a data network that links the sites independently of the voice call network. To initiate a dataconference session between the sites, a voice call session is first established between the telephone receivers via the voice call network. An address negotiation procedure implemented in software or hardware of the dataconferencing appliance is then manually initiated to identify a network access code and communicate it to at least a second one of the sites within the voice call session. The network access code is used to establish a data communication session via the data network for convenient transmission of image data between the sites.

Abstract: A projection apparatus is formed employing a transparent optical element to receive a plurality of colored light bundles from a plurality of light sources along a plurality of optical paths and to emit the plurality of colored light bundles along a substantially common optical path due, at least in part, to refraction through the transparent optical element.

Abstract: A projection apparatus is formed employing a solid state light source having either an associated or integrated sensor to monitor a thermal condition of a region of the solid state light source. The sensor is equipped to output a signal indicative of the thermal condition of the monitored region. In various embodiments, a controller is also provided to conditionally initiate one or more thermal management actions based at least in part on the thermal condition of the region as indicated by the signal.

Abstract: A projection system is provided with a primary light source and an auxiliary light source to compensate the primary light source for at least white light during an initial period to provide a user with an instant-on experience. In various embodiments, the auxiliary light source further compensates the primary light source for energy deficiencies for the red spectrum to achieve more balance in color.

Abstract: An image projection system achieves improved image brightness and optical efficiency by redirecting some of the unused polychromatic light emitted by a primary light source and reflected by a spatially nonuniform light filter back into the lamp assembly housing the light source. The unused portions of the polychromatic light are re-reflected for transmission through a different spatial region of the light filter, resulting in an approximately 30% increase in probability of transmission. Because recirculation of unused light occurs within the lamp assembly, there is no significant reduction in etendue. In a first preferred embodiment, an interference light filter reflects certain colors of light while transmitting other colors of light. In a second preferred embodiment, a polarizing light filter passes light in certain polarization states while reflecting light in other polarization states.

Abstract: A projection apparatus is formed employing at least one micro mirror with a tilt axis disposed on a first plane, and a number of light sources disposed on a light source axis disposed on a second plane, where the light source axis is parallel to the tilt axis.

Abstract: A method for selectively accessing a projected image is provided. In one embodiment, the method may include requesting an image display device to transmit over a network a projected image as displayed by the image display device. The method further may include receiving a copy of the requested projected image from the image display device in response to the request over the network.

Abstract: A projection system is provided with a primary light source and an auxiliary light source to compensate the primary light source for at least white light during an initial period to provide a user with an instant-on experience. In various embodiments, the auxiliary light source further compensates the primary light source for energy deficiencies for the red spectrum to achieve more balance in color.

Abstract: Projected systems (10, 12, 14, 16) include light source apparatuses (20, 24, 26) for programming narrow bands of unpolarized blue, green, and red light to associated reflective imaging devices that reflect selected patterns of the blue, green, and red light into a dichroic cross-combiner assembly (70, 72, 74), which recombines the light into a composite image and directs it into a projection lens (90) The reflective imaging devices are preferably micromirror displays (50, 51) having an array of pivotable micromirrors (52, 53) that direct on-state micromirror light to the projection lens and direct off-state micromirror light to a light absorbing surface (84).

Abstract: An optical panel having a small inlet, and a method of making a small inlet optical panel, are disclosed, which optical panel includes a individually coating, stacking, and cutting a first plurality of stacked optical waveguides to form an outlet face body with an outlet face, individually coating, stacking, and cutting a second plurality of stacked optical waveguides to form an inlet face body with an inlet face, and connecting an optical coupling element to the first plurality and second plurality of stacked optical waveguides, wherein the optical coupling element redirects light along a parallel axis of the inlet face to a parallel axis of the outlet face. In the preferred embodiment of the present invention, the inlet face is disposed obliquely with and askew from the outlet face.

Abstract: An image projection system achieves improved image brightness and optical efficiency by redirecting some of the unused polychromatic light emitted by a primary light source and reflected by a spatially nonuniform light filter back into the lamp assembly housing the light source. The unused portions of the polychromatic light are re-reflected for transmission through a different spatial region of the light filter, resulting in an approximately 30% increase in probability of transmission. Because recirculation of unused light occurs within the lamp assembly, there is no significant reduction in etendue. In a first preferred embodiment, an interference light filter reflects certain colors of light while transmitting other colors of light. In a second preferred embodiment, a polarizing light filter passes light in certain polarization states while reflecting light in other polarization states.

Abstract: Geographically distributed conference sites each have a telephone receiver and a dataconferencing appliance connected to a shared voice call network. Each site also has a display device for displaying images comprised of image data produced by an image source. The dataconferencing appliance is connected to a data network that links the sites independently of the voice call network. To initiate a dataconference session between the sites, a voice call session is first established between the telephone receivers via the voice call network. An address negotiation procedure implemented in software or hardware of the dataconferencing appliance is then manually initiated to identify a network access code and communicate it to at least a second one of the sites within the voice call session. The network access code is used to establish a data communication session via the data network for convenient transmission of image data between the sites.

Abstract: Geographically distributed conference sites each have a telephone receiver and a dataconferencing appliance connected to a shared voice call network. Each site also has a display device for displaying images comprised of image data produced by an image source. The dataconferencing appliance is connected to a data network that links the sites independently of the voice call network. To initiate a dataconference session between the sites, a voice call session is first established between the telephone receivers via the voice call network. An access negotiation procedure implemented in software or hardware of the dataconferencing appliance is then manually initiated to identify a network device access code and communicate it to at least a second one of the sites within the voice call session. The network device access code is used to establish a data communication session via the data network for convenient transmission of image data between the sites.

Abstract: A color sequential video projector (10) employs a color modulating device (22) and a segmented light pipe (30) that coact to provide a high luminous efficiency. The color modulating device splits polychromatic light into three different colored light beams (24, 26, 28) that are positionally stationary, but alternate mutually exclusive colors sequentially with time such that each pixel of a light valve (48) is exposed to all three colors during an image frame time. The segmented light pipe receives the three light beams and forms three adjacent color bands that are precisely aligned on the light valve. Because all three colors of light are constantly illuminating the light valve, light losses are substantially eliminated. The color modulating device employs multiple color wheels (82, 84, 86) each having filter segments (90, 92, 94) that form the three light beams by reflecting the alternating, mutual exclusive colors as the wheels rotate.

Abstract: An optical panel having a small inlet, and a method of making a small inlet optical panel, are disclosed, which optical panel includes a individually coating, stacking, and cutting a first plurality of stacked optical waveguides to form an outlet face body with an outlet face, individually coating, stacking, and cutting a second plurality of stacked optical waveguides to form an inlet face body with an inlet face, and connecting an optical coupling element to the first plurality and to the second plurality, wherein the optical coupling element redirects light along a parallel axis of the inlet face to a parallel axis of the outlet face. In the preferred embodiment of the present invention, the inlet face is disposed obliquely with and askew from the outlet face.

Abstract: Projected systems (10, 12, 14, 16) include light source apparatuses (20, 24, 26) for programming narrow bands of unpolarized blue, green, and red light to associated reflective imaging devices that reflect selected patterns of the blue, green, and red light into a dichroic cross-combiner assembly (70, 72, 74), which recombines the light into a composite image and directs it into a projection lens (90) The reflective imaging devices are preferably micromirror displays (50, 51) having an array of pivotable micromirrors (52, 53) that direct on-state micromirror light to the projection lens and direct off-state micromirror light to a light absorbing surface (84).