Dissertation Defense - Barbaros Kirişken (PHDEE)

Barbaros Kirişken - Ph.D. Electrical and Electronics Engineering

Asst. Prof. Özkan Bebek– Advisor

Date: 11.06.2021

Time: 09:00

Location: This meeting will be held ONLINE. Please send an e-mail to gizem.bakir@ozyegin.edu.tr in order to participate in this defense.

Efficient Methodologies for Actualizing Haptic Feedback in Consumer Electronics

Thesis Committee:

Asst. Prof. Özkan Bebek– Advisor, Özyeğin University

Prof. H. Fatih Uğurdağ, Özyeğin University

Asst. Prof. Barkan Uğurlu, Özyeğin University

Assoc. Prof. Mutlu Boztepe, Ege University

Assoc. Prof. Evren Samur, Boğaziçi University

Abstract:

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 mechanical support. On the other hand, haptic interactions in consumer devices have become more critical with immersive streaming content by including high-resolution video, sound and Augmented Reality/Virtual Reality (AR/VR), and tactile information. 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 thesis, a novel driving pattern and complete system design are presented that enables similar 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. Numerical 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 comparing smartphones with the novel LRA driving pattern and the benchmark devices demonstrated the feasibility of a low-cost solution to improve haptic effects and illusions.

Although the analysis in this thesis focuses on two main touch controls, a sizeable haptic library that can be used in any mobile application has been created as a result of the study. This integrated haptic library has been created for the mobile operating systems, and the library can be used to create common haptic gestures and also in AR/VR studies.

The results of this study are essential in terms of mobile devices' ability to reproduce haptic illusions with very low latency from the data of tactile internet (TI) and video streams containing haptic data, which will play a critical role for 5G technologies.

Bio: 

Barbaros Kirişken received the B.Eng. degree in electrical and electronics engineering from Eastern Mediterranean University, N. Cyprus, in 2007, and the M.S. degree in electric and electronics engineering from Ozyegin University, Istanbul, Turkey, in 2013, where he is currently pursuing the Ph.D. degree in electrical and electronics engineering.

In his long-term professional experience, he had several roles in the Research and Development Department with Vestel Electronics, Manisa, Turkey. He held several technical positions in designing and testing consumer electronics devices, especially brown goods from 2008 to 2017. Since 2017, he has also been a Manager with Innovative Technologies Group, Vestel. His research interests include consumer electronics, display technologies, IoT, system design, and haptics.