Abstract: The invention relates to a tri-color lamp for generating white light comprising a phosphor composition comprising a phosphor of general formula (Ba1-x-y-z-SrxCay)2SiO4:Euz, wherein 0?x?1, 0?y?1 and 0<z<1. The phosphor composition may also comprise a red phosphor. The two phosphors can absorb radiation emitted by a light emitting diode, particularly a blue LED. This arrangement provides a mixing of three light sources—light emitted from the two phosphors and unabsorbed light from the LED. The invention also relates to an alternative to a green LED comprising a single green phosphor of general formula (Ba1-x-y-z-SrxCay)2SiO4:Euz, wherein 0?x?0 1, 0?y?1 and 0<z<1, that absorbs radiation from a blue LED. A resulting device provides green light of high absorption efficiency and high luminous equivalent values.

Abstract: The invention relates to a tri-color lamp for generating white light comprising a phosphor composition comprising a phosphor of general formula (Ba1?x?y?z?SrxCay)2SiO4:Euz, wherein 0?x?1, 0?y?1 and 0<z<1. The phosphor composition may also comprise a red phosphor. The two phosphors can absorb radiation emitted by a light emitting diode, particularly a blue LED. This arrangement provides a mixing of three light sources—light emitted from the two phosphors and unabsorbed light from the LED. The invention also relates to an alternative to a green LED comprising a single green phosphor of general formula (Ba1?x?y?z ?SrxCay)2SiO4:Euz, wherein 0?x?1, 0?y?1 and 0<z<1, that absorbs radiation from a blue LED. A resulting device provides green light of high absorption efficiency and high luminous equivalent values.

Abstract: A light emitting device comprises a light emitting diode that emits primary light and a SrGa2S4:Eu2+ phosphor material capable of absorbing at least a portion of the primary light and emitting secondary light. The secondary light includes a wavelength longer than a wavelength of the primary light.

Abstract: A light source having emissions in a plurality of spectral bands. The simplest light source according to the present invention is constructed from first and second light sources and a dichroic beam splitter. The first and second solid state light sources emit light in first and second bands of non or only partially-overlapping wavelengths. The dichroic beam splitter combines light from the first and second solid state light sources by passing light in the first band while reflecting light in the second band to generate light having a spectral content in the first and second bands. The solid state light sources are preferably arrays of LEDs, VCSELs, or edge emitting semiconductor lasers. A light source having improved radiance in the green region of the spectrum can be constructed by utilizing first and second solid state light sources that emit in different bands in the green portion of the spectrum.

Abstract: A cold cathode (3) in the form of a solid thin film component is the basis for electron-optical terminal image devices. The thin-film structure is made up of a base electrode (5), e.g., in the form of a bundle of parallel strips, an insulating film (6), a semiconductor film (7) and a covering electrode (8), e.g., also a bundle of parallel strips but running perpendicularly to the base electrode (5) bundle. This set of layers borne on a substrate plate (4), is in an evacuated casing (2) and is opposite a fluorescent screen (12) or a light emitter (15), the metalized coating (11) of which forms the counter-pole for the electron acceleration chamber (9). The main applications of such electron-optical terminal image devices are embodiments as matrix-addressed flat displays, image converters or write/read lines.

Abstract: An electroluminescent composition of zinc sulfide containing manganese in an amount of about 10 to 50 mol percent and exhibiting a substantial infrared emission at greater than 700 nanometers wavelength.