Hatzfeld, Christian ; El Khoury, Mario ; Nakic, Christian ; Staab, Matthias ; Winterstein, Thomas ; Schlaak, Helmut F. (2016)
Electrothermal Actuators for Portable Braille Devices.
Eurohaptics 2016 - Work in Progress.
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
The development of large-scale matrix-displays with raised pins in Braille con guration is a widely researched eld in academia and industry. Piezoelectric actuation principles can be used to manufacture such devices at high costs, but several other actuation principles are investigated in search for a low-cost, mobile realization. In this work, we present electrothermal actuators as a possible solution. These actuators are based on thermal expansion of polymeric materials, that can be batch-processed with established micro-manufacturing methods. The combination of two actuators per Braille pin yields a bistable device with no energy consumption for static information display. It exhibits a maximum de ection of 60 µm when resisting a pushing force of 100mN, such assuring readability of Braille text. Current device fabrication is compatible with standard PCB processes, precision machining is investigated as possible low-cost alternative. Major drawback of the device are switching times of a few seconds that restrict the usefulness for high information refreshing rates.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Hatzfeld, Christian ; El Khoury, Mario ; Nakic, Christian ; Staab, Matthias ; Winterstein, Thomas ; Schlaak, Helmut F. |
| Art des Eintrags: | Bibliographie |
| Titel: | Electrothermal Actuators for Portable Braille Devices |
| Sprache: | Englisch |
| Publikationsjahr: | 2016 |
| Veranstaltungstitel: | Eurohaptics 2016 - Work in Progress |
| Kurzbeschreibung (Abstract): | The development of large-scale matrix-displays with raised pins in Braille con guration is a widely researched eld in academia and industry. Piezoelectric actuation principles can be used to manufacture such devices at high costs, but several other actuation principles are investigated in search for a low-cost, mobile realization. In this work, we present electrothermal actuators as a possible solution. These actuators are based on thermal expansion of polymeric materials, that can be batch-processed with established micro-manufacturing methods. The combination of two actuators per Braille pin yields a bistable device with no energy consumption for static information display. It exhibits a maximum de ection of 60 µm when resisting a pushing force of 100mN, such assuring readability of Braille text. Current device fabrication is compatible with standard PCB processes, precision machining is investigated as possible low-cost alternative. Major drawback of the device are switching times of a few seconds that restrict the usefulness for high information refreshing rates. |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Elektromechanische Konstruktionen (aufgelöst 18.12.2018) 18 Fachbereich Elektrotechnik und Informationstechnik > Mikrotechnik und Elektromechanische Systeme 18 Fachbereich Elektrotechnik und Informationstechnik > Mess- und Sensortechnik 18 Fachbereich Elektrotechnik und Informationstechnik |
| Hinterlegungsdatum: | 02 Aug 2016 08:19 |
| Letzte Änderung: | 21 Okt 2016 12:29 |
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