Osram Gesellschaft MIT Beschraenkter Haftung

Osram Gmbh

Osram Ag

Osram Beteiligungsverwaltung Gmbh

Jens Richter

Jan Oliver Drumm

Peter Vogt

Claus Seibert

Christian Gammer

Frank Massmann

Ronny Kürschner

Christian Grammer

According to the present disclosure, a converter device is provided. The device includes a phosphor element for converting a pump radiation into a conversion radiation and an excitation coil for producing an alternating magnetic field in which the phosphor element is arranged. The phosphor element has a conductor loop forming a coupling coil that is inductively coupled to the excitation coil such that the coupling coil and hence the phosphor element can be monitored by way of the inductive coupling.

Converter device and irradiation device having such a converter device

An optical converter is to be simply and reliably monitored. Thereto, a circuit device including a measurement bridge with a measurement branch, a first comparison branch and a second comparison branch is provided. A conductor path loop of the converter can be integrated in the measurement branch. The first comparison branch has a first series resistance variable via a first active element. Similarly, the second comparison branch has a second series resistance variable via a second active element. The first and the second active elements are respectively controllable by the same control signal. The circuit device further has an evaluation circuit with a first comparator and a second comparator, the outputs of which form the control signal and at the same time an output signal of the circuit device in AND-gated manner. Each comparator compares a tap of its respective comparison branch to a tap of the measurement branch.

Monitoring an optical converter

In various embodiments, a lighting device is provided. The lighting device includes a phosphor volume for at least partial wavelength conversion of primary light into secondary light, a primary light semiconductor light source for irradiating the phosphor volume with primary light, a measurement light generating arrangement for generating measurement light having a spectral composition outside the primary light and the secondary light, a measurement light detector sensitive to the measurement light, and a measurement light filter, which is fixedly connected to the phosphor volume and is optically arranged between the measurement light generating arrangement and the measurement light detector.

Lighting device

A method for adjusting the color point of a lighting unit including semiconductor-based lasers for generating an RGB signal. The method may include supplying at least one component of the RGB signal to a sensor via a filter; and actuating at least one of the semiconductor-based lasers by means of a signal detected by the sensor.

Method and device for adjusting the color point of a lighting unit

Various embodiments relate to a projection device for projecting useful data onto a projection surface. In this case, a first laser device generates radiation having a first wavelength and a second laser device generates radiation having a second wavelength. The spots of the respective beams are detected by a sensor device and fed to a drive device for the laser devices. Said drive device temporally shifts the drive signals relative to one another in such a way that a horizontal distance between the spots is minimized. Various embodiments furthermore relate to a corresponding method for projecting useful data.

Projection device

A method for projecting at least one light beam may include lengthening at least in part a holding duration for at least one pixel with respect to at least one further pixel.

Method and device for projecting at least one light beam

In various embodiments, a method for projecting at least one light beam is provided. The method may include providing at least one light beam; and setting a time base of a processor configured to control the at least one light beam as a function of a deflection of the at least one light beam.

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Deuerling, Germany

Jens Richter