PhD Dissertations

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    Efficient methodologies for actualizing haptic feedback in consumer electronics
    (2021-06-11) Kirişken, Barbaros; Bebek, Özkan; Bebek, Özkan; Uğurdağ, Hasan Fatih; Uğurlu, Regaip Barkan; Samur, E.; Boztepe, M.; Department of Electrical and Electronics Engineering; Kirişken, Barbaros
    There are significant limitations to creating effective haptic illusions in mobile devices such as tablets and smartphones. The main limitations are that these devices are too small in size to accommodate complex actuators and that they are without mechan ical support. Recent studies and commercial products show that the use of larger and complex multi-coil linear resonant actuators (LRAs) can significantly improve tactile perception quality at the expense of significant customer expectations such as size and cost. Solutions in the literature show no low-cost, feasible surface haptic application directly applicable to mobile consumer products. In this dissertation, a novel driving pattern and complete system design are presented that enables simi lar quality haptic effects using a simple LRA system. The proposed driving pattern consists of segmented signals with different frequencies and duty cycles determined from finite element-based modal analysis, and it was mainly used to simulate the two most common touch controls, the button and slider, on a mobile device. Nu merical and experimental results showed that the system can achieve a 3× reduction in cost, a 9× reduction in weight, and a 6× reduction in volume. User tests com paring smartphones with the novel LRA driving pattern and the benchmark devices demonstrated the feasibility of a low-cost solution to improve haptic effects and illu sions. Although the analysis in this dissertation focuses on two main touch controls, a haptic library that can be used in any mobile and augmented reality/virtual reality (AR/VR) applications has been created as a result of the study.