Abstract: Embodiments of this invention include a system, method and apparatus for combining light paths of multiple colored light sources through a common integration tunnel.

Abstract: A front projection display device is provided including an image-generating source configured to generate an image, a wide angle lens system adapted to receive the image, and a screen. The wide angle lens system may be configured to increase distortion of the image in a first stage and decrease distortion of the image in a second stage. The screen may be configured to receive the image from the wide angle lens system on a first side and reflect the image back to a viewer on the first side. In another embodiment, a screen is provided for a front projection system, the screen may be configured to receive light from a steep angle and may include any number of surface topographies configured to reflect light back to the viewer along a desired viewing plane.

Abstract: A Fresnel lens for a display device is provided. The Fresnel lens includes a first sloped surface angled to receive input light, a second sloped surface facing the first sloped surface, and a valley floor linking the first sloped surface to the second sloped surface. The valley floor may be configured to scatter stray light reflected from the first sloped surface.

Abstract: A thin rear projection television using a wide angle lens system is provided. In an embodiment, a fresnel screen is used in which there are at least two spatial zones in the screen with different properties. The at least two zones may be adapted to compensate for the variation in input angle.

Abstract: The ultra-thin rear projection display device described herein includes a lens system and one or more planar mirrors that are parallel to a screen on which an image is to be displayed. The screen may be a Fresnel lens having a plurality of bumps on the output surface to reduce the visibility of a stray light image. The Fresnel lens may have a diffusion layer on the output side of the Fresnel lens.

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 improves the brightness and/or color balance of a projected image. The system includes an auxiliary light source from which compensating light co-propagates with polychromatic light emitted by a primary light source along a primary light path. The compensating light has an emission energy content that minimizes an emission energy imbalance introduced by the primary light source. In a first preferred embodiment, the auxiliary light source is affixed at a location near the entrance end of a light tunnel such that the compensating light coincides with the primary light path before first reflection occurs. In a second preferred embodiment, the auxiliary light source is coupled to a light reflector adjacent to the primary light source and thereby allows the compensating light to propagate through the image projection system with the same efficiency as that of the light generated by the primary light source.

Abstract: The image projection system of the present invention improves either one or both of the brightness and color balance of a projected image. The system includes an auxiliary light source from which compensating light co-propagates with polychromatic light emitted by a primary light source along a primary light path. The compensating light has an emission energy content that minimizes an emission energy imbalance introduced by the primary light source. In a first preferred embodiment, the auxiliary light source is affixed at a location near the entrance end of a light tunnel such that the compensating light coincides with the primary light path before first reflection occurs. In a second preferred embodiment, the auxiliary light source is coupled to a light reflector adjacent to the primary light source and thereby allows the compensating light to propagate through the image projection system with the same efficiency as that of the light generated by the primary light source.

Abstract: An image projector has an optical path including, from upstream to downstream, a light source, a light pipe, a polarization conversion prism, a positive lens group and a light valve. The light pipe has an outlet and an inlet, and is constructed to receive light from the light source and to produce a unique projection display format as light is transmitted therethrough. The polarization conversion prism recycles light to optimize the amount of light that is properly polarized in the system. The positive lens group includes at least one positive lens positioned downstream of the polarization conversion prism. The positive lens group images the outlet of the light pipe onto the light valve.

Abstract: Paper and paperboard materials having enhanced biodegradability are produced by treatment of substrates with aqueous chemical solutions having properties which increase the decomposition of the substrates so treated. The chemical solutions consist of chemical nutrients which provide a source of alternate electron acceptors to enhance biodegradability through facultative anaerobic decomposition or chemical nutrients which, increase microbial growth on the paper or paperboard thereby enhancing decomposition of the paper or paperboard. The chemical solutions are absorbed and retained in the substrate or incorporated directly into a slurry of fibrous based material and formed into a paper product using paper making apparatus. In both instances, the methods enhance the biodegradability of the paper or paperboard so treated.

Abstract: A single sideband radio system. The system comprises a transmitter and a receiver. The transmitter comprises a transmitter baseband processing portion for generating a first baseband signal comprising first, second, and pilot components and modulating the first baseband signal in inverse proportion to the strength of the first component of the first baseband signal and an RF output stage for generating and transmitting a single sideband signal comprising first, second, and pilot portions corresponding to the first, second, and pilot components of the modulated first baseband signal. The receiver comprises an RF input stage for receiving the single sideband signal and a receiver baseband processing portion for generating a second baseband signal comprising first, second, and third components corresponding to the first, second, and third portions of the single sideband signal and for correcting the second baseband signal based on the pilot component of the second baseband signal.

Abstract: A decontamination system for rinsing hazardous materials from victims or suited emergency personnel using hand held thin flat octagonal rings of square aluminum tubing having a plurality of radially inwardly directed nozzles for simultaneously spraying water inwardly toward all sides of the part of a person at the center of the ring in a pattern from each nozzle which is wide but confined to about the thickness of the ring. Each ring has two external diametrically opposed sockets for receiving telescoping handles for spraying movement by one or two assisting persons, or it may be manipulated by a user for self-spraying by being hand held or by being pulled down around the user from an elevated horizontal position in which it is supported by elastic cords within a tent frame structure.

Abstract: A lamina for a medium density structural board made from dimensioned wood flakes cut from a mixture of hardwood species and having a high retained internal bond strength is disclosed. The wood flakes are blended with a phenol formaldehyde resin having a major quantity of a low molecular weight fraction and a wax and then formed into a hot pressed product. The lamina may be used alone or as the core of a structural board having veneer, hardboard or plywood face panels. Three or more lamina may be formed into a structural board or used as the core of a board having veneer, hardboard or plywood face panels.