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Title: Development of a dispenser printer to realise electroluminescent lamps on fabrics
Author: De Vos, Marc
ISNI:       0000 0004 7224 5867
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 2016
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Dispenser printed electroluminescent (EL) lamps on fabric have been investigated and a functional dispenser printed prototype that outperforms the commercial equivalent is presented. The state of the art in dispenser printing and screen-printing is considered and existing patents and prototype devices reviewed. No examples of printed electroluminescent lamps on fabric were found therefore providing an opportunity for novel work to be produced. A simulation model of the dispenser printer was developed, allowing the best performing dispense pressure for a defined ink to be found. An experimental method for identifying a suitable dispense pressure was also compared to the simulation. The results showed that the experimental method offered the same results more quickly, so an experimental approach was selected. The ability to print complex shapes was developed, enhancing the usefulness of the technology for a commercial application. A requirement for maintaining a constant separation between the substrate and the dispenser nozzle was discovered and this capability was integrated to allow the printing of complex shapes in a continuous print mode. Many displacement sensors were reviewed and a selection were tested before the Keyence LK-G10 was selected. The results from the Keyence profiles were validated against a commercial profilometer and the University of Southampton systen was found to fail to measure the transparent conducting layer although it could measure the transparent interface which the other displacement sensors could not. Phosphor and transparent conducting layers were investigated and optimised solutions for different use scenarios such as different lamp colours are identified. The route the dispenser nozzle takes to fill a defined area with ink was investigated. The results recommended the rectilinear pattern at 70% density as the best performer out of five infill patterns tested. Novel dispenser printed EL lamps on fabric were demonstrated. The dispenser printed EL lamps were compared to University of Southampton screen-printed and commercial screen-printed EL lamps. The results showed the dispenser printed EL lamps outperformed the commercial lamps and had comparable performance to the University of Southampton screen-printed EL lamps.
Supervisor: Tudor, Michael Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available