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EETE APR 2015

Automotive lighting design software models perception by human eye Version 2.0 of Synopsys’ LucidShape lighting design package enables more accurate model creation and contains a diagnostic tool for evaluating how a lighting system will be perceived by the human eye. This is particularly important for evaluating automotive components such as turn signals and brake lights. The LucidShape Visualize Module provides photorealistic visualisations that help designers troubleshoot and improve automotive lighting designs at any stage in the development process. Its Ray Data Viewer allows designers to preview vendor light sources before building model geometry, and its Light Pipe Tool enables fast, robust creation of complete light pipe geometry. An expanded material library with measured BSDF data delivers unsurpassed accuracy for modelling automotive lighting surfaces. LucidShape’s Visualize Module delivers high speed photorealistic images of an automotive lighting system’s lit appearance, which demonstrate luminance effects when light sources in a model are illuminated. Because the Visualize Module depicts all interactions between system geometry and light sources, it provides designers with a physically correct diagnostic tool for evaluating how a lighting system will be perceived by the human eye. The Visualize Module supports environment sources for the integration of 360-degree, high dynamic range (HDR) photographic environments into photorealistic visualisations and includes all physical and optical properties for an immersive, accurate rendering of a lighting scene. It combines LucidShape’s luminance camera and backward ray tracing with its GPUtrace solution to accelerate illumination simulations. Printable electroluminescent sheets in large-format Researchers at the INM – Leibniz Institute for New Materials have developed a cost-effective method that enables electroluminescence to be produced on large, curved surfaces. The solution produces the light-emitting layer and all other components using wet-chemical, printable methods. At present organic semiconducting light-emitting materials (OLEDs) can be incorporated in thin layers and used on curved surfaces but OLEDs for large-area illumination have until now proved to be cost-intensive owing to their low efficiency and short lifetime. “For processing we only need temperatures below 200 degrees Celsius. This means that we can apply all the required partial layers even to films or other flexible substrates,” explained Peter William de Oliveira, head of the program division Optical Materials. The result is that ‘luminous surfaces’ could now be produced cost-effectively and even in large formats. The luminous unit consists of two electrically conductive layers, between which the light-emitting particles are sandwiched in a dielectric binder layer. At least one of the conductive layers is also transparent. Due to the insulating layer, the absorbed energy is efficiently converted into light and appreciable heating is avoided. On application of an AC voltage, light is emitted from the electroluminescent layer. “We embed luminous particles in the form of functionalized zinc sulphide nanoparticles as phosphors into the binder layer,” explained de Oliveira “these are doped with copper or manganese. At present this allows the generation of green and blue-green light.” The electroluminescent light sheets developed at the INM can be directly connected to the customary mains voltage of 230 volts. Rectifiers, ballast capacitors or other switching units that first adapt the voltage can be omitted. www.electronics-eetimes.com Innovating for success Advanced Adhesives for  SMT (Surface Mount Technology)  Die Attach  Flip-Chip bonding  Switches, Relays, Connectors Microdispensing valve DELO-DOT PN2  Cost advantages Long actuator lifetime: >1 billion cycles  Precision and speed Dispensing frequency: up to 300 drops/s  Flexible setup Modular design Foil cartridge DELO-FLEXCAP  Process reliability Bubble-free dispensing Industrial Adhesives Phone +49 8193 9900-0 info@delo.de · www.delo.de/en


EETE APR 2015
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