Osram Opto Semiconductors Gmbh

Patent-treuhand-gesellschaft Fuer Elektrische Gluehlampen Mbh

Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Osram Gesellschaft MIT Beschrankter Haftung

Osram Gmbh

Osram Ag

Günter Huber

Frank Jermann

Martin Zachau

Andries Ellens

Franz Zwaschka

Wolfgang Rossner

Manfred Kobusch

Dieter Bokor

Tim Fiedler

Dirk Berben

Barbara Huckenbeck

Michael Ostertag

Ulrich Müller

Torsten Fries

Renate Hirrle

Bianca Pohl

Wolfang Rossner

An illumination device with at least one LED as the light source, the LED emitting primary radiation in the range from 370 to 430 nm of the optical spectral region (peak wavelength), this radiation being partially or completely converted into radiation of a longer wavelength by three phosphors which are exposed to the primary radiation from the LED and which emit in the blue, green and red spectral regions, so that white light is formed. The conversion is achieved at least with the aid of a phosphor which emits blue light with a wavelength maximum at 440 to 485 nm, and with the aid of a phosphor which emits green light with a wavelength maximum at 505 to 550 nm, and with the aid of a phosphor which emits red light with a wavelength maximum at 560 to 670 nm.

Illumination device with at least one LED as the light source

The invention relates to a phosphor composition for lamps with a lattice of monoclinic crystal structure (monazite) of type (1&#x2212;g)[((1&#x2212;c&#x2212;a)*Ln, c*Ce, a*A)PO]&#xd7;g*GeO, in which Ln is at least one element selected from the group consisting of lanthanum La, gadolinium Gd and/or Yttrium Y and A is at least one activator selected from the group consisting of terbium Tb, praseodymium Pr and/or europium Eu, and 0&#x2266;a&#x2266;1.0; 0&#x2266;c&#x2266;1.0, and 0&#x3c;g&#x2266;0.2.

Phosphor composition for lamps

A discharge lamp () having a discharge vessel () which surrounds a discharge medium which emits electromagnetic radiation in the VUV region when the lamp is operating has, on the inner side of the discharge vessel wall, a first phosphor layer, which faces the discharge medium and comprises a UVA component which can be excited by the VUV radiation and is intended to emit electromagnetic radiation in the UVA region. A second phosphor layer, which can be excited by the UVA radiation and is intended to emit electromagnetic radiation in the visible region either lies beneath the first phosphor layer or is applied to the outer side of the discharge vessel wall. This results in a lower color locus shift compared to a conventional phosphor mixture, which can be excited directly by VUV radiation.

Discharge lamp with an arrangement of phosphor layers excitable by VUV and UVA radiation

The invention relates to a luminescence conversion led based illumination deice that emits primarily radiation in the range of from 370 and 430 nm of the optical spectrum (peak wavelength). Said radiation is converted to radiation having a longer wavelength using three luminescent substances that emit in the red, green and blue range.

A discharge lamp () having a discharge vessel () that surrounds a discharge medium that emits electromagnetic radiation in the VUV region during operation of the lamp, has on the inner side of the discharge vessel wall a yellow phosphor layer facing the discharge medium, and a blue phosphor layer lying therebelow. By contrast with a conventional three-band phosphor mixture, a higher luminous flux and a smaller color locus displacement are thereby achieved.

Discharge lamp having two-band phosphor

Illumination device with at least one led as the light source

Growing community of inventors

Schrobenhausen, Germany

Günter Huber