Siemens Aktiengesellschaft

Osram Opto Semiconductors Gmbh

Matthias Rebhan

Karl Weidner

Hubert Schierling

Walter Wegleiter

Bert Braune

Jörg Zapf

Herbert Schwarzbauer

Norbert Stath

Norbert Seliger

Hans Wulkesch

Laurence Amigues

Kerstin Häse

An optoelectronic component includes a carrier element. At least two elements are arranged in an adjacent fashion on a first side of the carrier element. Each element has at least one optically active region for generating the electromagnetic radiation. The optoelectronic component has an electrically insulating protective layer arranged at least in part on a surface of the at least two adjacent elements which lies opposite the first side. The protective layer, at least in a first region arranged between the at least two adjacent elements, at least predominantly prevents a transmission of the electromagnetic radiation generated by the optically active regions.

Optoelectronic component and production method for an optoelectronic component

A film, based on polyimide or epoxy, is laminated onto a surface of a substrate under a vacuum, so that the film closely covers the surface and adheres thereto. Contact surfaces to be formed on the surface are uncovered by opening windows in the film. A contact is established in a plane manner between each uncovered contact surface and a layer of metal. This establishes a large-surface contact providing high current density for power semiconductor chips.

Method for making contact with electrical contact with electrical contact surfaces of substrate and device with substrate having electrical contact surfaces

The invention relates to a method and apparatus for recognizing a standstill condition when restarting a power converter-fed AC motor without a tachometer generator. According to an embodiment of the invention, a standstill recognition method includes first and second active phases decoupled by a passive phase. In each phase, time characteristics of the orthogonal current components of a measured motor current are recorded, and the energy component of current from the second active phase is further evaluated to generate an average value. This generated average value and an upper range value are then compared to a limiting value, which will be exceeded when the AC motor is at a standstill. Thus, through application of a current measurement and a simple evaluation, one can quickly determine the actual state of the power converter-fed AC motor when restarting.

Method and apparatus for standstill recognition when restarting a power

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Riemerling, Germany

Matthias Rebhan