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CAUTIONS for LED Display

1. Cleaning
Ifdcleaningdofdtheddisplaydisdnecessary,dgentlydwipedthedsurfacedanddthedpinsdoutdwithdalcoholdordIPA.dUsedofddharshd
chemicalsdmightdcausedcorrosiondofdthedpinsdordresultdindhazedondthedsurfacedofdtheddisplay.

2. Soldering
Solderdtemperature:dMax.d260@CdfordMax.d3dsec.atd1.6mmdbelowdseatingdplane.

3. Drive Mode

Theddisplaysdcandbeddrivendindeitherdthedconstantdvoltagedmodedordthedconstantdcurrentdmode.dReferdtodthedspecifca-
tionsdondmaximumdallowableddrivedcurrentdindthedcontinuousdcurrentdmodedordthedpulsedcurrentdmode.dItdisdrecom-
mendeddthatdadcurrentdlimitingdresistordisdincorporateddindseriesdwithdeachdLED.

4. Reliability Test For LED Display

Classifcation TestdItem DescriptiondanddTestdCondition Referencedstandard
Evaluatesdresistancedofdtheddevicedwhendoperatedd
atdelectricaldstressd
Ta=underdroomdtemperature MIL-STD-750:1026
OperationdLife If=12mA ～ 25mAdperdsegmentdor MIL-STD-883:1005
Ip=80mA/dutyd=1/8,dPW=1.25ms JISdCd7021d:dB-1
Ip=160mA/dutyd=1/16,PW=1ms(dot)
TestdTimed=d1000hrsd(-24hrs,+72hrs)
Evaluatesdmoisturedresistancedofdtheddevicedwhend
storeddfordadlongd
HighdTemperature
HighdHumidity termdatdhighdtemperaturedanddhumidity MIL-STD-202d:d103B
JISdCd7021d:dB-11
Ta=85d±d5℃
Storage
Rh=90 ～ 95%dRh
TestdTimed=d240hrsd±d2hrs
Endurance Evaluatesdresistancedofdleakagedcurrentdagainstdlongd
Test termdthermal,d
HighdTemperature humidityd,danddelectricaldstressesd
HighdHumidity
ReversedBias Ta=85d±d5℃
Rh=90 ～ 95%dRhddddddddVrd=d5V
Testdtimed=d500hrsd(-24hrs,d+48hrs)
Evaluatesddeviceddurabilitydfordlongdtermdstoragedind
HighdTemperature highdtemperature MIL-STD-883d:d1008
Storage Ta=105d±d5℃ JISdCd7021d:dB-10
TestdTimed=d1000hrs(-24hrs,d+72hrs)
Evaluatesddeviceddurabilitydfordlongdtermdstoragedind
LowdTemperature lowdtemperature
Storage Ta=-35d±d5℃ JISdCd7021d:dB-12
TestdTimed=d1000hrs(-24hrs,d+72hrs)
Evaluatesdresistancedofddevicedatdthermaldstressesdord
expansiondandd MIL-STD-202d:d107D
Temperatured contraction MIL-STD-750d:d1051
Cycling d105℃d～d25℃d～d-35℃d～d25℃ MIL-STD-883d:d1010
d30mindddddd5mindddddd30minddddd5min JISdCd7021d:dA-4
10dCycles(Cobd:dThotd=d65℃dTcoldd=d-25℃ )
Evaluatesddevice'sdstructuredanddmechanicaldresis-
tancedwhend MIL-STD-202d:d107D
suddenlydexposeddatdseveredchanges
ThermaldShock MIL-STD-750d:d1051
Environmentald ddd105d±d5℃dd～dd-35d±d5℃ MIL-STD-883d:d1011
Test dddddd30minddddddddddddd30min
10dCyclesd(Cob:Thotd=d65℃dTcoldd=d-25℃ )
Evaluatesdresistancedtodthermaldstressdcauseddbyd MIL-STD-202d:d210A
solderingd
SolderdResistance MIL-STD-750d:d2031
T.Sold=d260d±d5℃ JISdCd7021d:dA-1
DwelldTimed=d10d±d1dsec
MIL-STD-202d:d208D
Evaluatesdsolderabilitydondleadsdofddevice MIL-STD-750d:d2026
Solderability T.Sold=d230d±d5℃ MIL-STD-883d:d2003
DwelldTimed=d5d±d1sec
JISdCd7021d:dA-2
LED Display > Application Note

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