Thesis - Teknisk Design

easons of accidents. So to increase security a way of interacting with the devicewithout looking into it must be found. That is why dimensional space resolution is amust to in-vehicle touch screen. Having it might let the driver find something in thetouch screen without taking his or her eyes off the road. The last technology leftwithout dimensional space resolution is screen tactile feedback, and it is for thatreason that is not considered as the appropriate technology.There are only two technologies left, these are localized screen vibration andsurface textured changing. Both have the properties demanded above asdimensional space resolution or large amount of haptic feedback. The fact thatmakes these two stand out among the other haptic feedbacks is the approach to areal experience. On the latest days companies working to produce haptic feedbackin touch screen´s devices have been looking for a complete experience to reducethe sensation of virtuality created by the deprivation of the touch. In one handlocalized screen vibration have the possibility to have unlimited number of tactonsbased in a spread technology (vibration), while in the other using surface texturechanging means leading innovation.To sum up, both, localized screen vibration and surface texture changing arereally good technologies to produce haptic feedback for in-vehicle touch screens.Even though, surface texture changing stands out among the others as the best onefor in-vehicle environment due to the lack of vibration. The technologies producinghaptic feedback will be enumerated in desirable order in the table 3.2.Order of preferenceTechnology1 Surface texture changing2 Localized screen vibration3 Screen Tactile display4 Full body tactile displayUsed in combination with another technology“Touch Click” feedbackNot able to use in this projectUltrasonic air pressure waveTextured surfacesTable 3.2 Technology to produce haptic feedback in order of preference29