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Michalow A.,Microfluidics | Michalow A.,Bartels Mikrotechnik GmbH
Sensors (Peterborough, NH) | Year: 2011

A robust, postage-stamp-sized micropump, with low energy consumption and a use life of more than 10,000 hours, enables new applications for both gas and liquid chemical sensor systems by facilitating their use in networked installations and handheld systems. The important technical features of the micropump are based a dual-membrane pump mechanism actuated by a double configuration of piezo elements in combination with passive valves. Only a single polymeric material, polyphenylene sulfone (PPSU), comes into contact with the pumping medium. Regarding medical-field applications, the material is certified in accordance to ISO 10993 and USP class VI. When the voltage decreases, the piezoceramic's corresponding deformation causes the membrane to flex upwards, sucking in the fluid and refilling the chamber. The pump can perform several hundred such pumping cycles per second. The pump's simple design integrates numerous features into a few injection-molded components, which means that the dual-membrane micropump systems can be produced at a low cost.

Woitschach O.,University of Bremen | Sosna C.,University of Bremen | Lang W.,University of Bremen | Uckelmann J.,Bartels Mikrotechnik GmbH
Proceedings of IEEE Sensors | Year: 2010

In this paper a prototype of an intelligent micropump is presented. The electrical parameters of the micropump are regulated by measuring the actual flow rate with an integrated thermal flow sensor. The micropump moves liquids with a regulated flow rate with a range of 100 μl/min to several ml/min. The accuracy is better than 10 %. The micropump and flow sensor are controlled via integrated electronics to form a fully integrated system. The flow sensor is placed directly into the path of the fluid of the micropump, to minimize the complexity of the system and maximize its robustness. Further the system was manufactured using low cost methods. The gained flexibility of the system opens the door to a wide range of applications such as the dosage of fluids e.g. in the biomedical and pharmaceutical industry. ©2010 IEEE.

Rawert J.,Advanced Display Technology GmbH ADT | Jerosch D.,Advanced Display Technology GmbH ADT | Blankenbach K.,Pforzheim University | Bartels F.,Bartels Mikrotechnik GmbH
Digest of Technical Papers - SID International Symposium | Year: 2010

D 3-Displays electrowetting displays ("Droplet-Driven- Displays"; developed by advanced display technology (ADT) Deutschland GmbH) have features like bistability and highest reflectivity, which offer unique application options in the area of non-emissive displays. This paper deals with the "No Power" (green) display technology and its applications for indicators and character displays including optical performance comparison. © 2010 SID.

Blankenbach K.,Pforzheim University | Bartels F.,Bartels Mikrotechnik GmbH | Rawert J.,Advanced display technology adt | Jerosch D.,Advanced display technology adt
IDW'10 - Proceedings of the 17th International Display Workshops | Year: 2010

High reflectivity and transmissive backlight mode are advantages of electrowetting displays; ADTs approach is the only bistable one. This paper deals with LED replacements for energy-saving systems. Achievements are fully compatible integration into LED housings, superior optical performance of electrowetting indicators in bright light compared to LEDs and "in-cell" touch. © 2010 ITE and SID.

Blankenbach K.,Pforzheim University | Jentsch M.,Pforzheim University | Rawert J.,Advanced display technology adt | Jerosch D.,Advanced display technology adt | And 2 more authors.
Digest of Technical Papers - SID International Symposium | Year: 2011

adt's electrowetting displays are designed for bistability ("green") and capable of all backlight modes (reflective, transflective and transmissive). Compared to LED indicators, our pixels draw no power and are sunlight readable. Using CMY stacks we achieved a superior color gamut and high reflectivity (both topics are essential for electronic billboards). © 2011 SID.

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