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ex-coworker
Filip has obtained his Ph.D. in 2002
I graduated as an electrotechnical engineer at the University of Gent in 1998. In the same year I've started working on my Ph.D.: 'Introduction of colour in reflective microdisplays'.
The liquid crystals used in the microdisplays are PDLC and PNLC. Both liquid crystals have very similar electro-optical characteristics and don't require polarisers. They are also called 'paper white' liquid crystals because they are as white as paper when there is no voltage applied. This property makes these liquid crystals ideal for bright low power portable personal viewer applications (cellular phones, palm top computers, view finder in camcorders,...).
The first goal of my Ph.D. is to optimize the opto-electrical properties (especially the brightness) of the PDLC/PNLC reflective microdisplays. Topics that are to be studied on this matter are the mirrors of the display (Al, Ni, Ag), the filling of the display (vacuum, non vacuum), curing parameters of the liquid crystal and the cell gap of the display.
The second goal is to design an optical system for personal viewer applications. This optical system has to create an enlarged virtual image of the microdisplay.
There also has to be designed a measurement setup to evaluate the applicability of the personal viewer microdisplay system in 'real life' situations.
Finally it is intended to introduce full colour in the microdisplays.
My Ph.D. studies have been sponsored by the IWT (Flemish Institute for the Promotion of the Scientific-Technological Research in the Industry).