Bayer Intellectual Property Gmbh

Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Technische Hochschule Nürnberg Georg Simon Ohm

Bayer Materialscience Ag

Technische Hochschule Nuernberg Georg-simon-ohm

Michael Roppel

Rafael Oser

Wilfried Haese

Ulrich Blaschke

Friedrich-Karl Bruder

Alexander Meyer

Franky Bruynseels

Raymond Wong

Ice Zhang

Dieter Rühle

Andrea Maier-Richter

Eckard Foltin

Martin Gebhard

Jörg Wehrle

Matthias Voetz

Bernhard Heck

Burkhard Reitze

Michael Prein

Alena Taranka

Alexander Von Hoffmann

Peter Schibli

Oser Rafael

The invention relates to the use of branched aliphatic hydrocarbons such as squalane in compositions based on thermoplastic polymer, in particular on polycarbonate, which are used for producing molded parts used in LED lighting units, such as covers for instance. According to the invention it has been found that the use of branched aliphatic hydrocarbons makes it possible to enhance the total transmission and the transmission in the range from 360 to 460 nm, thus making corresponding compositions particularly suitable for producing molded parts for use in combination with white LED light sources. It has additionally been shown that yellowing and haze are simultaneously reduced.

Covers for LED light sources

The present invention relates to a projection spotlight module comprising a reflector with a first focal point and a second focal point, a light source which is disposed at the first focal point of the reflector or close to the first focal point of the reflector, a lens that has its focal point in common with the second focal point of the reflector, and a stop system with color filters for reducing color fringing. Projection spotlight modules according to the invention are especially suited for illumination in the automotive sector, of utility vehicles, of rail vehicles, of two-wheeled vehicles, of ships, in particular as headlights, as theater spotlights or as architectural lightings, for instance in the illumination of facades.

Device for reducing color fringing

A luminous body comprises a transparent plastic moulding with indentations, and LED DIEs disposed within the indentations. One side of each LED DIE lies approximately flush with an upper side of the moulding, and each LED DIE is connected to an electricity supply via electrical conductors disposed on the moulding. A method for producing such a luminous body is also disclosed.

Luminous body with LED dies and production thereof

This invention relates to the use of polycarbonate for the production of an optical recording medium in which secure high speed operation, a transcriptability of the pit/groove structure of &#x3e;85% and sufficient disc flatness can be achieved and the polycarbonate is based on bisphenol A and the polycarbonate contains a release agent in an amount less than 2000 ppm.

Substrate material for high speed optical discs

Growing community of inventors

Burscheid, Germany

Michael Roppel