完整版济大泉院毕业设计外文资料翻译.docx

完整版济大泉院毕业设计外文资料翻译.docx

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完整版济大泉院毕业设计外文资料翻译

济南大学泉城学院

毕业设计外文资料翻

译

题目为提高信息理解涉及的LED设计因素

专业电气工程及其自动化—

班级电气]]02

学生XXXX

学号XXXXXXXXXXXXXX

指导教师XXXXX_

二◦一五年三月十五日

DesignFactorsofLEDDisplayforImproving

Message

Comprehension

JoeyC.Y.SoandAlanH.S.Chan

DepartmentofManufacturingEngineeringand

EngineeringManagement

CityUniversityofHongKong

KowloonTong

HongKong

Mostofthepreviousstudiesondynamictextdisplaywerelimitedtosmallscreendisplaysandwebsitedesign.Sofar,nostudiesfoundonLED（light-emittingdiode）displayboardforoptimaldisplaymethod.ItisaninterestingquestionofwhatthebestdisplaymethodistodeliverelectronictextmessagestothepublicwithLEDdisplays.Inthispaper,somerelatedempiricalstudiesconcerningthevariousdisplaymethodsofdynamictextpresentation,suchastextdisplaytype,numberofmessagelinesandtextbackgroundcolorcombinationarereviewed.Aproposedexperimentof

ChinesereadingtaskonLEDdisplayunderdifferenttaskconditionsfordeterminingtheeffectsofdisplaymethod,numberofmessagelinesdisplayed,andtextcoloroncomprehensionperformanceandsubjectivepreferenceisalsodiscussedinthispaper.Accordingtothereadabilityandpreferenceratingsofthesubjectsgivenunderdifferentconditions,wecanmakeuseoftheproposedexperimenttoinvestigatethebestdisplaymethodandcolorforcomprehendingthedeliveredmessages,andtoprovideusefuldesignrecommendationsofusingLEDdisplaysforadvertisinganddeliveringmessagestothepublic.

INTRODUCTION

Nowadays,theuseoftheelectronicinformationdisplaysystemsprovidesanextrameansofdeliveringmessagesoradstocustomersorpeopleduringtheirtravelstoworkinourfast-pacedsociety.Theadvanceddisplaytechnologyoffersavarietyofselectionofcolorsanddisplaymethodswhichimprovethepresentationoftextualinformation.LED（Light-emittingdiode）displayswidelyusedasadisplayoutputunitlikeacomputerscreen.Itallowsobserverstoreadmessagesatadistance.TheexplosionofcommunicationtechnologyinthepastdecadesandtheincreaseinuseofLEDdisplaysarousetheinterestinoptimizingeffectivemethodsofdisplayingdynamictext.However,inthepast,researchersonlyfocusedonthestudiesofdynamictextdisplayonsmallscreenssuchascellularphones,pagersanddesktopphones（ChenandChien2005,Laarni2002）andsomeresearcheswereconcernedabouttheoptimaldynamictextdisplayinwebsitedesign（Wangetal.2003,WangandChen2003,Wangetal.2002）.Sofar,nostudiesfoundonLEDdisplayboardforoptimal

displaymethod,inparticular,Chinesereading.ItisaninterestingquestionofwhatthebestdisplaymethodistodeliverelectronictextmessagestothepublicwithLEDdisplays.

Thethreecommondisplaymethodsfordisplayingdynamicstextare:

a）

RSVP（RapidSerialVisualPresentation）—displayssuccessivewordsoftextualinformationatafixedpointonthescreen,usuallyatapredeterminedrate,inrapidsuccession;b）scrolling-ablockoftextmovesupordownineitherarelativelycontinuousoraline-by-linemanner;andc）leading（TimeSquare）-presentsthewordsbysequenceandmovesthestringofwordsfromrighttoleft.Inmanyresearchesonscrolling,thescrollingspeedwasalwayscontrollablebytheoperatorsordesignersinwhichtheymovedthroughthedocumentbyoperatingaandHaselgrove2001）orascrollarrow（Piolatetal.1997）.However,thefixeddisplayspeedmethodwasemployedinthecurrentexperiment.Regardingtheverticalscrolling,textusuallymovesinaline-by-linemannerorscrollscontinuouslyandautomaticallyarasteratatimeupfromthebottomofthescreen.Sincetheleadingmethodisnotpracticalofdisplayingmulti-linetext,onlyRSVPandscrollingmethodsweretestedinthecurrentstudytoinvestigatetheeffectsofthenumberoflinesdisplayedonthecomprehensionperformanceandpreference.ThepresentationofshorttextsegmentsinRSVPeliminateseyemovementsandleadstoapossiblereductionofcognitiveload（Potter1984）.

Concerningthenumberofmessagelines,WangandCao（2005）studiedthemessagedisplayformatofportabledynamicmessagesigns,theirresultsshowedthatasingle-linemessagewasbetterthanamultiple-line

message.Withthesmallernumberoflinesdisplayed,itwouldfacilitatereadersbydirectingtheirattentiontotheappropriatetextunitinitsproperorderandeliminatetheirneedtodecidewhereandwhentheeyesshouldmovenext.

Therearesomeresearchesreportingthatcolorcontrastofthetextbackgroundofadynamicdisplayusers?

visualperformance（Wangetal.2002,WangandChen2003）.ArecentstudybyYangetal.（2005）aboutenhancingmessagesdisplayedonadynamicmessagesignshowedthatifonlyonecolorwasused,amberorgreenwouldbemuchpreferredoverred.Theyalsofoundthatamber-coloredmessageswouldleadtotheshortestresponsetimeandthatwithred-coloredmessages,subjectswouldtakelongertimetorespondtothemessages.AwiderangeofcolorsisavailablewiththeLEDdisplays,andmostcolorsbeingusedarered,green,andamber.

PROPOSEDSTUDY

Basedontheaboveliteraturereview,itisnotedthatnostudydoneonexploringthechoiceofeffectivecolorsorcolorcombination,displaymethodandnumberofmessagelinesforincreasingthereadabilityofmessagesdeliveredfromLEDdisplays.Tofillthegapintheliterature,thereisaneedtoconductaresearchstudywhichmorethoroughlyinvestigatesthesefactorsconsideringcomprehensionperformanceandsubjectivepreference.

Design

Theaimoftheproposedexperimentistoevaluatewhetherdisplay

method,rownumberandtextcolorwouldsignificantlyaffectthecomprehensionscoreandsubjectivepreferenceonLEDdisplayforChinesereading.Thefactorsandlevelsstudiedinthisexperimentareasfollows:

twotextdisplaymethods（RapidSerialVisualPresentation,scrollingwithpause）,fourtypesofrownumber（onetofourlines）,andthreetextcolors（red,greenandamber）.Ineachtestingcondition,thecomprehensionscoresoftheobjectiveperformancemeasureandtheratingsofthesubjectivemeasurewillbecollected.Thecomprehensionscoreoftheobjectiveperformancemeasuredenotedthecorrectnessofsubjectresponsesgiventotheninemultiplechoicequestionsinacomprehensiontaskfollowingthepassagereading.Itwillbeusedfortheevaluationofthesubjects'abilityofunderstandingthepassagesread.Thepreferenceratingisasubjectiveevaluationofthetestingdisplayformatgivenbythereadersreflectingindividualpreference,whichshouldalsobeconsideredwhendesigninganoptimaldisplaymethod.

Subjects

StudentswhoareregisteredforacourseinErgonomicsintheCityUniversityofHongKongwillserveassubjects.TheywillbeassessedtowithanorthoratorandnocolordeficiencywithIshiharaPesudoIsochromaticPlates.

Materials

Chinesepassageswithnotechnicaltermsornamesofunusualwordsontopicsofwillbeused.Thepassagelength,includingpunctuationmarks,rangesfrom77to100characters.

Apparatus

Acomputer（PentiumVI——2.8GHz）witha582mmX326mm（include.Thepanelsizeis512mmX256mm.TheLEDdisplaydotdimensionis128dotsX64dotsanditsdotdiameteris3.75mmwith4mmdotseparation.Itcandisplayupto4rowsof8traditionalChinesecharactersof64mmX64mmlargeperline.Thepassageswillbedisplayedatarateof160charactersperminute.

WorkplaceConditions

Thedisplaywillbemountedatacenter.Thecharacterssizewillsubtendanglesof113,arcatthesubjects,eyes.Theambientilluminationwillbeabout300lx.Noglareorreflectionappearsonthedisplayscreen.Procedure

Asetofquestionsheetswiththreequestionsonapagewillbegiventoeachsubjectatthebeginningofthetest.However,theyarenotallowedtopreviewthequestionsbeforeeachpresentation.SubjectsareaskedtoreadthepassagespresentedontheLEDdisplayandtrytheirbesttounderstandthemessages.Eachpresentationconditionconsistsofthreepassages.Afterreadingthefirstpassageonthedisplay,theywillbeinstructedtoattemptthethreemultiple-choicequestionsonthefirstsheetofthequestionset.Afteroneminute,thenextpassagewillappearonthedisplay.Theprocedureisrepeateduntilallthethreepassagesintheconditionarecompleted.Justafterreadingthethreepassages,apreferenceratingonthatparticularconditionwillbegivenbythesubjectonanine-pointLikertscale.Theproceduresarerepeateduntilalltheeightconditionsweretested.

Inordertoavoidmentalorvisualfatigue,a5-minutebreakisgivenafterreadingthefirst12passages.

DATAANALYSIS

ComprehensionPerformance

Thedependentmeasurecollectedinthisexperimentisthecomprehensionscores（%）,i.e.thepercentageofcorrectnessdenotedthereadingperformanceofeachcondition.Themethodforcalculatingthepercentageofcorrectnessforeachcondition=（thenumberofquestions?

thenumberofwronganswers）thetotalnumberofquestions.Thecomprehensionscoresofindividualsubjectsrangedfrom0to9wereconvertedto0to100%.Toidentifywhichdisplaymethodwouldletcandidatesachievebetterperformanceinthecomprehensiontask,thedifferencesamongstsubjects?

performanceonthedifferentdisplayconditionswillbeevaluatedwithanalysisofvariance（ANOVA）.Bonferronitestwillbeusedforpostcomprehensionscore,thesecondmeasureinthisreadingexperimentisthesubjectivepreferencereflectinganinstantandquicksubjectiveresponseofsubjectstothereadingconditions.Withanine-pointLikertscale,aquestionnaireisusedinthisstudytoinvestigatesubjects'preferencetowardsareadinginterfacewiththeattributesof