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| Number | Title | Issue Date |
| 6827451 | Multiple light valve lighting device or apparatus with wide color palette and improved contrast ratio An apparatus is disclosed comprising a lamp which produces a first light which may be a white light; a first light valve, a second light valve, a first color separator, and a first aperture device. The first color separator receives the white light from the lamp, an... | 12/07/2004 |
| 6575577 | Multiple light valve lighting device or apparatus with wide color palette and improved contrast ratio An apparatus is disclosed comprising a lamp which produces a first light which may be a white light; a first light valve, a second light valve, a first color separator, and a first aperture device. The first color separator receives the white light from t... | 06/10/2003 |
| 6561653 | Multiple light valve lighting device or apparatus with wide color palette and improved contrast ratio An apparatus is disclosed comprising a lamp which produces a first light which may be a white light; a first light valve, a second light valve, and a first aperture device, which may be a first electronically switchable filter. The first aperture device o... | 05/13/2003 |
| 5459591 | Electromagnetic energy beam steering devices The present invention relates to beam steering and scanning devices which utilize an imaging cell which incorporates a solid-state cholesteric liquid crystal (CLC) element, an electronically controlled, variable half-wave retarder and a source of circular... | 10/17/1995 |
| 4723171 | Electroscopic fluid picture-display device suitable for displaying television images An electroscopic fluid picture-display device suitable for display television images and operating with pulse duration modulation. A picture signal sample-and-hold circuit (S/H) is followed by a pulse duration modulator (UG, DE) which comprises a first el... | 02/02/1988 |
