Thesis - Teknisk Design

herself why should the original interaction been conserved if there is a new one. Theanswer is quite simple, the introduction of haptic feedback in the touch screen ismeant to help and enrich the experience and it is most useful in driving situations, butthe driver could also interact with the device as a primary activity and in this situationthe user might desire to use the original interaction.There are three main navigation interactions considered in the implementationof the device. These are explained below.Navigation across ItemsThis haptic feedback is introduced to enable the user to feel the diverse itemsdisplayed in the screen of the device at a moment. The feedback works incomparison to lack of feedback. To be more precise, the items that can be selectedin the screen have a feedback on it and the empty spaces do not. That means thatwhen the user moves across the screen only the spaces occupied by selectableitems produce haptic feedback to the user.The main point when designing this kind of feedback is that the items in thescreen should be easy to remember and also easy to remember where they areplaced. This would help in the future the users to recognize those without the need tolook.The screens and items including this kind of haptic feedback are three. The firstand easiest to interact with is the main screen and the items are its four activitiesoptions. The next one is the radio and the items are the five set radio stations. Thisbuttons are a bit smaller and closer to each other. The last items with navigationfeedback are the keypad from the telephone. These are 16 buttons from numbers toactions and they are pretty close together.As it can be seen from the description above, they go from really easy todistinguish to more difficult in three levels. Doing it that way enables to measure up towhich level the users are able to distinguish the different buttons.Level SelectorsThere are many level selectors in the infotainment commands of a car, for examplethe volume, the dial selector, temperature and many others. It is interesting up to apoint to have a way to measure how much the user has increased those selectors.A fact that requires a special mention is the design of the selector. Nowadaysthe selectors that are found in cars are rounds as rotary selectors, this is because forthe user is it easier to move a round physical selector that a linear one that has endedges. In this case the selector is not physical but digital and it is easier to follow aline that a round without slipping out of the edges. Furthermore, producing a linegive to the user a feedback on the direction of the selection. If it is moved to theright means higher and to the left down. These two main reasons are why there wasjust one line selector in the prototype; this selector is the volume of the radio.Scrolling through DataSome large amount of data as e-mails or contact is displayed in list. To be able toread this information from the distance where the driver is sitting the letter should bebig enough. This makes impossible to fit all the information in one screen andtherefore, a scrolling list is necessary. When the user is interacting with a scrolling list in34