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"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 7901084 | Image projector with display modes A portable video projector includes facility to direct a projected image field along an axis in an alignment corresponding to the state of an optical element. ... | 03/08/2011 |
| 7436572 | Micromirrors and hinge structures for micromirror arrays in projection displays A spatial light modulator is disclosed, along with methods for making such a modulator. The spatial light modulator comprises an array of micromirrors each having a hinge and a micromirror plate held via a hinge on a substrate, the micromirror plate being attached t... | 10/14/2008 |
| 7365907 | Rear projection image display apparatus A compact rear projection image display apparatus in which the projection distance in a projection optical system is substantially reduced and no reflection mirror is used, thereby eliminating a major cause of image trapezoidal distortion. The rear projection image ... | 04/29/2008 |
| 7244030 | Rear projection type image display device The present invention relates to a rear projection type image display device comprising projection lenses (2, 3) for projecting an image displayed on an image display element onto a transmission type screen (6) on a larger scale, an optical path turn-b... | 07/17/2007 |
| 7195358 | Rear projection type image display device The present invention relates to a rear projection type image display device comprising projection lenses (2, 3) for projecting an image displayed on an image display element onto a transmission type screen (6) on a larger scale, an optical path turn-b... | 03/27/2007 |
| 7187343 | Image projection with display-condition compensation A method of projecting a compensated principal image may include projecting a principal image onto a surface and projecting an intended calibration image onto a calibration area of the surface. The intended calibration image may be projected when the principal image... | 03/06/2007 |
| 7018047 | Image projection lighting device with variable homogeneity An image projection lighting device is provided which includes a variable homogenizing system. The variable homogenizing system may homogenize light projected by a lamp across a light valve. The variable homogenizing system may vary the light across the light valve ... | 03/28/2006 |
| 6947198 | Emissive image display apparatus A large screen emissive display operating at atmospheric pressure includes pixels, the red, green, and blue subpixels of which are excited by UV laser light scanned onto the subpixels by a pixel activation mechanism. The pixel activation mechanism includes three gra... | 09/20/2005 |
| 6643069 | SLM-base color projection display having multiple SLM's and multiple projection lenses An optical unit (20, 30) for color projection display system that has three SLMs (21, 31) and three projection lenses (27, 37). Each SLM (21, 31) receives light of a different primary color, which it modulates to form images for that color. Each SLM (21, ... | 11/04/2003 |
| 6578969 | Arrangement for cutting off radiation in projectors and/or illumination devices An arrangement is disclosed for cutting off intensive radiation in projectors and/or illumination devices whose projection head, which projects the light, is mounted in a receptacle or holder rotatable about an azimuth axis so as to be swivelable about an... | 06/17/2003 |
| 6175431 | Projection systems based on reconfigurable holographic optics A projection system and a method of displaying a projected input image on a projection screen of the system utilize one or more reconfigurable holographic optical elements (HOEs) to optically manipulate propagating light in the system. The reconfigurable ... | 01/16/2001 |
| 6020940 | Liquid crystal projector and method of driving the projector The present invention is directed to a liquid crystal projector comprising a light source for emitting white light, a separation mechanism for separating the white light into light beams with a plurality of colors at different angles, a liquid crystal pan... | 02/01/2000 |
| 5805244 | Liquid crystal projector using a monochromatic liquid crystal display A liquid crystal projector using monochromatic liquid crystal displays (LCDs). The liquid crystal projector includes a filter for filtering light emitted from a light source and for outputting a white light. A condenser lens group then condenses the white... | 09/08/1998 |
| 5311226 | Toy projector A toy projector (10) is equipped with a light source (11), a non-light-transmitting member (13) having at least one light-transmitting part (14) which transmits the light from the light source (11), a member (15) having light-transmitting designs provided... | 05/10/1994 |
| 4532696 | Method of manufacturing a semiconductor device for forming a deep field region in a semiconductor substrate This invention provides a method of forming a buried element isolation region in a semiconductor substrate. The method comprises steps of forming a gate electrode material pattern on a gate insulating film formed on a semiconductive substrate, forming a g... | 08/06/1985 |
