lytro wireless camera - info.boydcorp.com · when lytro wanted to introduce its next generation of...
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www.aavid.com 1.855.32.AAVID
IntroductionWhenLytrowantedtointroduceitsnextgenerationofwirelesscamera,theyturnedtoAavid, Thermal division of Boyd Corporation,forassistance.Aavid’sexpertiseinthermalmanagement,FEAanalysis,packagelayoutanddesignfeasibilitystudiesallowedLytrotolaunchthenewcamerainatimelyandcost-effectivemanner.
The ChallengeThecamera’sfeatureset-a4inchtouchscreen,imagesensor,variablepower(dependingonoperatingmode)PCB,solenoidactuatedmechanicalshutterandahighzoomlenswithaccompanyingmotorcontrolboard-requiredathermalsolutionthatwouldensurequalityphotographsandlongproductlife.
Thermally,themostcriticalcomponentwastheimagesensor,asitsoperatingtemperaturedirectlyaffectsthequalityofthecapturedphotographs.Keepingtemperaturedeviationsinsidethecamerabodyatorbelowtheimagesensor’slimitwastheprimaryfocusofthethermalsolution.
OtherPCBcomponents,suchasthehighcapacitybatteryandchipsubcomponentsalsocontributedtointernaltemperatureincreases.Exteriorsurfacetemperature(touchtemperature)hadtoremainundertargetlimitsduringalloperatingstatesofthecamera.
The SolutionTheAavidTeamcreatedahighlydetailedCFDmodeloftheexistingcameraconcept.Thismodel’sparameterswerefine-tuneduntiltheyreflectedthesameresultsfromactuallabtests.
WithaverifiedCFDmodelestablished,Aavidwasabletosuggestvariousinternallayoutsthatcouldimprovethermalperformance.Somemethodsthatwereemployedwere:
-Isolatingthehighpowercomponentsfromthecriticalcomponents
-Optimizingthethermalpathtotransferheatawayfromcriticalcomponents
-Materialselectionandfinishofthecamerabodytoincreaseradiantheattransfer
totheoutsideenvironment
The Deliverables/ResultsAavidprovidedLytrowithreportsdetailingtheexpectedimagesensorjunction,chip,batteryandtouchtemperaturesforvariousoperatingconditions.Allfellbelowspecifiedlimits.
Bycreatingathermalpathwaytotherearsideoftheenclosure(previouslydumpedelsewhere),overallthermalperformancewasincreased.
Aavid‘sTeamfoundthattherewassignificantthermalperformancegainedbyplacingcertainhighpowercomponentsawayfromeachotherandawayfromcriticalcomponentsonthePCB.AnoptimizedPCBlayoutbasedonthesediscoverieswassuggestedtothecustomer.
Itwasshownthatthegravityvectordidnotsignificantlyalterthermalresults;thereforethecamerawasabletooperateinanyorientationwithoutnegativethermalimpact.
UsingthedataandreportsofAavid'sfindings,Lytroapprovedtheproposedchangesandsuccessfullylaunchedtheirnextgenerationofwirelesscameras.
Lytro Wireless Camera Design Case Study