購買液晶顯示器必定防備的七大騙局（TheseventrapsthatmustbetakencareofwhenbuyingLCDs）TheseventrapsthatmustbetakencareofwhenbuyingLCDsAnyproductpricedependslargelyonthecost,reducethecostisthemosteffectivewaytoimproveprofits,soallkindsofproductsareeasytocutcornersonthecostoflinks,theliquidcrystaldisplayisnoexception.Seeminglysimilarproducts,differentmanufacturers,differentmodels,therearehundredsorevenmorethan1000yuangap,thereasonisthatthereisadifferenceincost.ThepanellevelistheeasiesttocutcornersAliquidcrystaldisplayseventypercentofthecostfromtheliquidcrystalpanel,aliquidcrystalpanelisacorecomponentofliquidcrystaldisplaywell,ofcourseitismostlikelytocutcornersofparts.Firstofall,therearedifferencesinperformanceofLCDpanels,theperformanceofamoregeneralLCDpanel,butalsoahighangleofview,highcontrastpanel.Performanceeffectofliquidcrystaldisplayornot,basicallybythechoiceofwhatthepaneldecided,badJSislikelytobesomeshoddy,lowperformanceproductsforsuperiorperformanceproductsandHuyouexpensiveforsuchproductsonlyneedtocarefullychecktheinformation,therealperformancecancleartheproducteasytodistinguish.Inaddition,theliquidcrystalpanelthesameperformancewhenthesaleofthefactorywassetatdifferentlevels,anddifferentlevelsofpanelpricesaredifferent,inordertoreducethecostonlyneedtoorderalowlevelpanelontheline.Fromthepanelappearanceisdifficulttodistinguishbetweenthegradeofthepanel,soafterallthepanelassembledintoaproductfromthesaleisdifficulttoseethedifference.Todistinguishthegradeofthepanel,mainlytoseethenumberofpixelsofthepanel,thelessthenumberofpixels,andpromisednohighlightspanellevelishigher.Thehighlevelpanelitselfislightsmall,nootherproblemssuchasspots,color.Thelowerlevelofthepanelhavemoreorlessproblems,suchasbadormore,therearestains,lightishard.Thatistosay,thisiswhentheactualbusinessclassificationpanelfactorybychoosingtodistinguish,goodproductquality,highgrade,higherprices,orlowgoodsordefectiveproducts,thepriceiscertainlylow.ThisclassificationstandardiswidelyusedinITproductparts.Infact,therearemanyLCDdisplaygiantsarenotspeciallycustomizedproprietaryLCDpanels,butalsowithothertwoorthreewiremanufacturersinthesamepanelmanufacturersprocurement.Butthiskindofcompaniesoftenpaymuchattentiontotheselectionpanel,isoftenselectedasmallpartinabatchofLCDpanelmanufacturersinthispartoftheboutiquecoursequalityishigherthanotherproducts,highcost,thepriceofmoreexpensiveandveryeasytounderstand.Infact,fortheirownusepanelmanufacturersqualityoftenhaveamentalpicture,agenttolddealerstosellundertheconditionthatabatchofproducts,becausethepanelqualityispoor,pronetobaddarkspotsandotherissues.Ofcourse,thefasteryousell,thebetter.Ifthepanelqualityisgood,manufacturersmayalsotemporarilyimplementinsurancepolicyonabatchofproducts,becausemanufacturersunderstandthattheseproductsaregood,andtherateofreworkwillnotbehigh.HiddentrickyinLCDproductpackagingDonotthinkthattheproductpackagingisaboxsosimple,theproductpackaginginvolvesmanyissuessuchassafety,environmentalprotection,inthemassproductionofindustrialproducts,packagingisalsoveryimportant,thecostisnotlow.Ifyoudon'tseethediscardedboxes,youcansellafewcentsakilo.Alotofpeoplearescramblingforit,aren'tthey?Liquidcrystaldisplaygoodpackagingisusuallythick,inordertoensurethehandlingtimewillnotbedamaged,therawmaterialsareusuallyrecyclable,environmentallyfriendlymaterial,canfindthelogoonthepackagingmaterialcirculationingeneral.Inthepackagingprinting,paymoreattentiontothemanufacturersusuallyprintedonthebuilt-indisplayappearance,butalsoasfaraspossibletoprovideinformationsuchasdisplay,suchasthetype,size,weight,theapproximateperformance,theprintedtextisalsoacostofprintinglesscostlower.Moreattentionwillalsobepaidtothebeautyoftheouterpacking,Theprintedcontentcanevenincludepicturesandotherinformation,verydelicate.Andintheouterpackaging,Jerrymanufacturersgenerallytrytosimplifythesethings,packagecanbeusedformorethanthespecifications

anouterofsimilarproducts.Inadditiontothepackagingitself,theinternalfillingmaterialcannotbeignored.Themostcommonmaterialsarerecycledpaperandfoamplastics.Recycledpaperismoreexpensive,andisusuallyseenonhigh-enddisplays.Thefoamisverypopular.Becauseitisaby-productofpetroleum,thepriceisverycheap.LCDproductscanalsoshrinkfunctionFamiliarfriendsallknow,thecurrentfieldofliquidcrystaldisplayhasanunwrittenrule,aliquidcrystaldisplayusuallylaunchedwithDVIinterfaceandDVIinterfacewithtwomodels,andotherspecificationsarealmostexactlythesame,ofcourse,thepriceisalsodifferent.Thisisthemostdirectexampleofsimplifyingfunctionalityandreducingcosts.Ofcourse,thereareotherwaystoomitbuilt-inspeakers,microphones,USBinterfaces,andsoon.ThisfunctionalsimplificationcaneffectivelyreducecostswithoutreducingmostoftheperformanceoftheLCDdisplay."Shrink"versionoftheproductwillnotbedesigned,usingthe"original"productsoftheschemecanbeproduced,issimplyarichproductline,theclanofthetwoproductscanmeettheneedsofmorepeople,inlinewithmarketrules.Infact,this"Jerry"canberegardedasanormalmeans,isnotnecessaryasanabhorrenceofthephenomenon,wecitethecaseisnottoeveryonechoosefunctionalproducts,ifthisfunctionisoflittlesignificanceforyou,thenchoose"shrink"productsiscertainlymoresensible.LCDproductssuchasaccessoriescannotbelessTheattachmentisanotherverystraightforwardLCDdisplayTheusualLCDdisplaysincludecables,discs,instructions,othermountingattachments.Anydeductionsorreductionsinqualitycanreducecosts.

link.andThemostcommonexampleisthedoubleinterfacedisplayshouldequippedwithDVIandVGAtwocablechiselDVIline,cansavepartofthecost,dualinterfacedisplayismorehigh-endproducts,twolinesarebasicallytherewillbenow,withthepopularityofDVI,manyentry-leveldisplayalsohasthisinterface,buttheDVIlineisusuallyomitted.Inadditiontosimplydonotgive,thequalityofcableisalsoverycommon.First,saytheVGAsignalline,whichiseasiesttosee.OK,VGAlinediameteriscoarse,andflexibleandelastic,andthejointpartisexquisite,withoutburr.ThepoorqualityVGAwireisnotonlyverythin,butthewireisverycrispandthequalityofthejointisnotgood.Atpresent,manylowdisplayVGAlineshaveshrunkseriously,manybrandsattachedtotheVGAlineisactuallyonlyalittlebitthickthanthekeyboardline.AllthiscomeswithaVGAlinemachine,agradenothigh.TheDVIlineisroughlythesameastheVGAline.Inadditiontothesignalline,thepowerlinealsoshowstheproblem.Goodlinesofflexiblematerial,andthelengthisgenerally1meters,5to2metersorso,thedifferenceinthelengthofthelinehasshrunk,thecorrespondingmaterialrequirementsarereduced.Then,youcanseethroughthesignallineinterfaceauthenticationsaidgoodsignlinehasalotof,whattheEU,Japan,theUnitedStates,andChina'sCCC,thelineisthroughmultinationalcertification,qualityguaranteed.Poorlinecertificationisrare,andsomearenotavailableatall.Ifthemonitorcomeswithspeakers,whatshouldalsopayattentiontocable,goodaudiolineshavedegaussingring,highcost.Ofcourse,ofcoursenot.However,theaudiolinesattachedtothemonitorareallthesame,anditisraretoseecableswithdegaussingloops.Transformerisalsopartoftheimportantaccessoriesdisplay,goodqualityandqualityingeneral,themiddleofgreatflexibility.However,atpresent,manydisplaymanufacturersprefertousebuilt-inpower,sothatthecostoftheirownmaster,orcontrol.Inadditiontothecablecanmakeabigarticle,savethedriveCD-ROM,instructionsarethesame.Althoughthecostofthesepartsisnothigh,Butinthemassproductionofindustrialproducts,theamountaccumulatedisnotsmall.ProductshellpronetoJerrybuildingThebiggestcostoutsidetheLCDpanelistheshell,whichisthemostimportantpartofthedisplaymanufacturers.LCDmanufacturershaveaspecialdesignandR&Dteamfortheshapeoftheproducts,andthecurrentLCDcaneasilydistinguishthemanufacturersfromthedesign.ThelargebrandLCDoftenhasuniquedesigninappearanceandshape,butthesmallfactorieswithinsufficientstrengthoftenadoptsimpleshapedesign,orimitateotherexcellentproducts.Sincethereissomuchknowledgeontheshell,somuchefforthasbeenputintoit,ofcourse,itisveryeasytocutcorners.First,simplifythedesignasmuchaspossible.Forexample:plasticshelldisplaycommonlyusedaresmoothandpitted,whichpittedthesurfacethanexpensive,ifthehousingisdesignedintoalight,thecostisnaturallydesignedthancheapnoodles.Inaddition,intheshapedesigncanalsoadoptthegradualmethod,onlyontheoriginalbasistodosomeminoradjustment,sothatyoucanuseasmuchsparepartsaspossible,sothatthecostsavings.Secondly,itcanreducethematerialoftheshell.Themostcommonmaterialforliquidcrystaldisplaysisplastic,andasmallnumberofhigh-grademetalhousings,suchasAOCand174F,areintegralsteelshells,andSamsung193P+evenusesaluminummagnesiumalloyhousings.Castasidethemetalshell,nottosay,plasticshellisalsoavarietyof,ofwhichthemostimportantisthematerialisdifferent,goodplasticmaterialisenvironmentalprotection,fire,andsomelessisnotsogood.Ingeneral,thequalityofgooddisplay,fireplasticshell,atleastthecostof200yuanorso,iftheuniqueshape,butalsomoreexpensive.Asfarasmetalisconcerned,letalone.Finally,workhardonthemold.Manypeoplemaynotknow,infact,diespendingisoneofthehighestcostofprojectdisplaymanufacturingandR&Dcostisverysimple!Eveniftheappearanceofthedisplay,thelightmoldcostwillbeabout1000000!Anddiecannotold,midwayrequiresalotofmaintenanceinordertomaintainthequalityofhousing,evenifitistomaintainthegooddietherelife,weartoacertainextentisuseless,mustspendalotofmoneytodothenew.Ifthemanufacturerswanttoreducehousingcosts,themoldcancontinuetouseatend-of-lifedegreeunderthecondition,thiscansavealotofmoldcost,buttheshellaccuracywillbegreatlyaffected,willbeveryrough.TCO,RoHScertificationBasicsInordertoensuresafety,environmentalprotectionandotherfactors,someindustrializedproductshavecertainstandardstobeimplemented,thatis,weusuallysaycertification,onlyincompliancewiththesecertificationinordertoallowuserstoeasetheiruse.Certificationofthisitemingeneralgoodscannotsee,cannottouch,andwhenmorecertifiedproductsmusthavemoreadvantages.Andthisisjustoneicononthemonitor,similartotheinvisiblecost,alsoneedmanufacturerspayagreatdealofprice.Throughthesecertificationisnotfree,inaccordancewiththecertificationbodies,feesaredifferent,itcostsalot.Atpresent,China'simplementationofCCCmandatorysecuritycertificationofdisplayproducts,aslongasitisnotinferiorproductswillpassthiscertification.TherestofthecommoncertificationsincludetheCEEuropeancommonmarketsecuritymark,Japan'sJISlogo,theBritishBEABlogo,theUSULlogo,theFrenchNFlogo,andtheGermanCSlogo.Ifthedisplayinthedomesticsales,itonlyneedstopassCCC,andifsoldinthecountriesmentionedabove,itisnecessarytopassthecountry'scertification,obtaincertification.Inadditiontothesafetycertificationthatelectronicproductsmustcarryout,therearesomeprofessionalcertifications,suchasMPR,II,TCO,andthecurrentpopularRoHS.Amongthem,MPRIIisaboutthemonitorradiationcertification,isarelativelybasicstandard,almostallmonitorscanmeetthisstandard.TCOisthecertificationofenvironmentalprotection,andRoHSisthecertificationoflead-freeproduction.

processTCOcertificationisaSwedishLaborUniondevelopedaseriesofstrictandstandardfordisplayproducts,onlyinecology,energy,radiation,humanengineeringandelectricalsafetyfiveaspectsareinlinewiththeTCODevelopmentstandards,canthroughtheTCOversioncertification.TCOiscurrentlyrecognizedasthemoststringentauthenticationsysteminthefieldofdisplay,andthedisplayofthisspecificationcanprovidemaximumprotectionforusers.Currently,TCOhasreleasedthe06standard.RoHS(Restriction,of,Hazardous,Substances,hazardoussubstancesrestrictions)isanofficialcertificationoftheEuropeanUnion(Figure1),knownbytheindustryastheworld'smoststringentenvironmentaldirectives.AccordingtotherelevantprovisionsofRoHScertificationstandards,sinceJuly1,2006,allsoldintheEUmarketofelectricalandelectronicequipmentmustprohibittheuseoflead(Pb),mercury(Hg),cadmium(Cd),sixchromium(Cr6+)andotherheavymetals,andpolybrominateddiphenylether(PBDEtwo)andpolybrominatedbiphenyls(PBB)andotherharmfulsubstances.Ofcourse,RoHS'sinfluenceisnotlimitedtoEurope.Itisbecomingaglobalstandard.Therelevantlawsandregulationsofourcountryhavealreadyenteredthe"bulletin"stage,andwebelieveitwillbepublishedandimplementedsoon.Topassthesecertificationisnoteasy,firstofall,theproductshouldbestrictsecuritycertification,designrequirements,allaspectscannotbecareless,soastoincreasetheproductioncostoftheproduct.Accordingtostatistics,amonitorthroughcertificationrequiresabout200thousandofthecost,althoughtherearedomesticcommissioningunits,butthelicensingrightsinforeigncountries.Theaveragedisplaytakesabout2months,sothecostofasmallcertificationisneverlow.Theselong-termenvironmentalprotectionandlead-freeconsiderations,isclearlynotinlinewiththeideaofJS,somanysmallplantsinadditiontoelectricalsafetycertificationnecessary,ofcourse,alltheothercertification.OthercostcontrolforLCDproductsInadditiontotheaforementionedaspects,thereoftheLCDthatcanbe"costcontrol",includingandpowermodules.

arealsopartscontrolmodulesPositioncontrolmoduleinliquidcrystaldisplayisequivale