Osram Gmbh

Osram Ag

Josef Kroell

Ulrich Hartwig

Oskar Schallmoser

Oliver Mehl

Klaus Finsterbusch

Kai Wolter

Martin Brueckel

Markus Baier

Peter Flesch

Holger Laabs

Kai Franz

Bärbel Dierks

According to an embodiment, a polyhedron may be provided. The polyhedron may include a first luminescent face; and a second luminescent face.

Polyhedron, rotational arrangements, light source arrangements, a light source device, a lighting device, a three-dimensional body and projectors

The lighting device () has at least one light generation device () for generating a primary light (P), a first luminophore () for converting the wavelength of the primary light (P) to a first secondary light (S), and a second luminophore () for converting the wavelength of the primary light (P) to a second secondary light (S), the first luminophore () being located on a movable support (), which is provided in order to alternatively move the first luminophore into and out of a beam path of the primary light (P), and the second luminophore being located on a stationary support (). The invention also relates to a method for generating wavelength-converted secondary light from primary light with alternating irradiation of a first luminophore located on a movable support and of a second luminophore located on a stationary support by the primary light. The invention can be used, for example, as a projection device for film and video projection, in endoscopy, for lighting effects in the entertainment industry, for medical irradiations as well as in the automobile industry, in particular as a head light for motor vehicles.

Lighting apparatus with luminophore on a moveable carrier

A lighting device comprising a pump laser matrix () and a phosphor arrangement. The pump laser matrix () is configured to emit pump radiation () having a controllable pump radiation power distribution for the irradiation of the phosphor arrangement (). The phosphor arrangement () comprises at least two different phosphors (R, Y, G) which can be irradiated with the pump radiation () and re-emit said pump radiation in a manner such that it is at least partly and in each case differently wavelength-converted. The lighting device () is configured to generate, with the aid of the pump laser matrix (), a controllable distribution of the surface power density of the pump radiation on the phosphors (R, Y, G) of the phosphor arrangement ().

Lighting device with a pump laser matrix, and method for operating said lighting device

A lighting device may include a pump laser row and a phosphor arrangement. The pump laser row is designed for the purpose of emitting pump laser radiation for the irradiation of the phosphor arrangement. The phosphor arrangement has at least two different phosphors, which can be irradiated with the pump laser radiation and emit the pump laser radiation again at least partially and converted in wavelength differently in each case, and a movable mirror, which is designed for the purpose of reflecting the pump laser radiation of the pump laser row in a targeted manner on the phosphors in dependence on its position.

Lighting device with a pump laser row and method for operating said lighting device

A method for operating a gas discharge lamp featuring a gas discharge lamp burner and a first and a second electrode, wherein the electrodes have a nominal electrode separation in the gas discharge lamp burner before their first activation and said nominal separation is correlated to the lamp voltage. The method may include checking whether the off-time, corresponding to the time duration between two DC voltage phases, has expired; and if the off-time has expired, omitting commutations or applying pseudo-commutations for a predefined time duration which depends on the lamp voltage in such a way that a time duration of the omission of at least one of commutations and application of pseudo-commutations is predefined for each lamp voltage.

Growing community of inventors

Potsdam, Germany

Josef Kroell