Thesis - Teknisk Design

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Enablesmultitouching*Cleaned withclothes withoutcommand inputPosibility ofprotective layers(LONG LIVESPAN)Models withpressure inforMiddle costActivated bycapacitive stylus &globed hands**Less accurate thanresistiveConductivesmudges caninterferenceResistant to waterand dustCheapPossiblemultitouch***Any object detectedPressure threshlod todetectionWorst visibility andamount of emittedlightExternal layer easilyscratched (LIVESPANSHORT)Information from x-axisImage clarity andreslutionNo functionality affectedby scratchingAny solid can be detectedEasy to breakInterfereces due to dustor waterHigh visibilityNo need to touch screen toactivateAny solid can be detected Most expensive Not working on cold weatherTable 2.1 Comparison between touch screen technologies*Look at the different type of capacitive touch screens, multitouch in Mutual Capacitance touch screen.**Some information regarding globed hand in capacitive touch screens.***Stantum’s resistive touch screen.14
2.3 The interactionMarket research on haptic feedback devicesWhen starting to talk about haptic feedback in touch screen devices as mobilephones or tablets, the vast majority of the people would think of the device vibrationas the most common in nowadays electronic objects. But when going deeper intothe subject and carrying some research you can notice that it is the past of hapticfeedback, manufacturers are moving to a more real experience.FULL BODY TACTILE DISPLAYThe first touch screen devices including haptics as feedback were implemented withvibrating motors or mechanical actuators. Those make the whole device vibratewhen a feedback is needed (Poupyrev et al. 2002). Although, that solution is not thebest to have haptic feedback in touch screen devices, it makes people realize thatthere is a need of haptic feedback for a touch screen device to be user-friendly.Taking regular vibration into consideration there is one weak feature that mustbe taken into consideration. When the device vibrate you may lose your point ofcontact and your precision due to the movement, which makes the hapticfeedback worse that the lack of it. It also makes noise when vibrating if it is placed ina rigid place, something not desirable in a large number of situations. For example ifyou are using haptic feedback instead of sound feedback because silence isneeded. Another important fact to highlight is the lack of dimensional spacefeedback of the touch screen; if the whole device vibrates there is no possibility toknow where you are touching or where you have to be touching instead. Theconsumption of energy due to the movement of the motor is relatively high andreally important for those devices running with a battery. Last, as it is the wholedevice that vibrates there are quite few tactons that can be implemented(Poupyrev et al. 2002). Actually, even if it does not seem like an advantageousfeature nowadays it is a good start for new users to get in touch with this feedbackwithout being overload.SCREEN TACTILE DISPLAYTechnology, regarding haptic feedback, continues its development. <strong>Design</strong>ers foundout the error of making the whole device vibrate not only for the disturbances thatthe movement might cause to the user but also for the high consumption of energy.The next step for the improvement of the haptic feedback was to focus themovement into the touch screen. Therefore, you can only get the haptic feedback ifyou are interacting with the touch screen; the finger touching the touch screen is theonly part of your body receiving haptic feedback. As the movement was slightly lessextensive people can make more precise movements while the device vibrates anddo not lose their point of contact so often. Regarding noise, it is reduced due to areduction of the surface in movement, a new design of the wave shape and moreaccurate mechanical design, even though it is not cancelled (Poupyrev, I. and15
Page 1: Design and evaluation of hapticfeed
Page 4 and 5: Design and evaluation of haptic fee
Page 6 and 7: AbstractDesign and evaluation of ha
Page 8 and 9: THE GLOBAL PARTICIPANT´S REQUIREME
Page 10 and 11: directions, hence, a driver, while
Page 12 and 13: these interactions are already chos
Page 14 and 15: Haptic’s lecturesStartTouch scree
Page 16 and 17: as part of human’s skills in the
Page 18 and 19: Among the weaknesses of these devic
Page 20 and 21: Back to the general capacitive touc
Page 24 and 25: Maruyama, S. 2003). At that point,
Page 26 and 27: “TOUCH CLICK” FEEDBACKA relativ
Page 28 and 29: unlimited variations of vibrations,
Page 30 and 31: COMPARISON BETWEEN HAPTIC FEEDBACK
Page 32 and 33: 3Results from the analysis oftheore
Page 34 and 35: Figure 3.1 Requisites for an in-veh
Page 36 and 37: 3.2 SECOND QUESTION:Which haptic fe
Page 38 and 39: First step intohaptic feedbackNo ov
Page 40 and 41: The deviceThe device that has been
Page 42 and 43: herself why should the original int
Page 44 and 45: method from Immersion. This method
Page 46 and 47: create the virtual. That is related
Page 48 and 49: THE RADIOThe radio has five buttons
Page 50 and 51: is a check box. Only one check box
Page 52 and 53: EfficiencyThe efficiency is the amo
Page 54 and 55: market because the inherent usabili
Page 56 and 57: Components of usabilityHere it will
Page 58 and 59: Figure 4.2 Notional learning curve,
Page 60 and 61: o If he or she has a car?o Which br
Page 62 and 63: SpeedAffects cognitive workload?DAL
Page 64 and 65: Deviation of normative pathTask 2:
Page 66 and 67: Deviation of normative pathFigure 4
Page 68 and 69: Participant 32520151050Effort ofAtt
Page 70 and 71: Participant 3 Happiness Stimulation
Page 72 and 73:
Analysis of usability study5With th
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solved, although once one individua
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Discussion6The discussion will be c
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confirmation on release. When the u
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ReferenceAlexander, J., Marshall, M
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Immersion Corporation 3. What is Mo
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Appendix IUHL Effect Library listII
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Power21 Triple Click - High Power 3
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71 Alert 9 - High Power72 Alert 10
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122 Engine 4 - Mid Power Infinite R
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Participant Characteristic’s Form
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Interview on LearnabilityFirst test
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‣ Time on task ………………
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DALI QuestionnaireInstructions:Thro
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Effort of attentionorVisual demandE
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Tactile demandorInterferenceTactile
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Weighted rating:Study: …………
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XXIII
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CHALMERS UNIVERTITY OF TECHNOLOGYSE
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Thesis - Teknisk Design

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