Minus 30 na Plus 80: Wanem samting tru Wide Tempereture i minim long wanpela Automotive TFT Display

Stori

Disemba 15, 2008

Wide tempereja em tupela namba long wanpela datasit na foapela feilia mod long fil: senis bilong 'liquid crystal phase', 'backlight decay', 'polariser yellowing' na 'cracked solder joints'. Wanem samting i feil long wanwan arere, bilong wanem 'vibration' i kilim ol konekta pastaim, wanem samting IATF 16949 i askim long wanpela 'display factory', na hau long raitim wanpela bikpela 'temperature spec' we i no inap long kisim sedo.

Tripela kain soim kar, tripela set bilong lo

Dispela tok 'vehicle display' i karamapim tripela kain kain maket. Faktori fit bilong wanpela kampani bilong wokim kar i nidim IATF 16949, PPAP na 'reliability' we ol i skelim long laip bilong kar. Bihain long maket i laikim lukluk na sais bilong putim, wantaim setifikesen bar we i daunbilo tru. Ol masin bilong konstraksen na egrikalsa i nidim 'vibration', das na 'temperature resistance', tasol ol samting bilong EMC i no wankain olsem ol pasindia kar.

Miksim tripela na 'classic error' i kamap: prais bilong 'aftermarket' i kamap long 'factory-fit reliability'. Olsem na namba wan step em i no long askim sapos wanpela saplaia i ken wokim wanpela otomotiv TFT displei, em i long makim husat bilong tripela yu na sapos ol pepa bilong kampani i wokim kar i stret. Taim ol i stretim pinis, prais, taim bilong kisim na namba bilong sampela samting i senis.

Tru tumas: wanpela fektori-fit sempel i min olsem wanpela ful PPAP paket we ol i wokim long templet bilong man i wokim kar na 6-pela i go inap 10-pela wik; wanpela 'aftermarket sample' i min olsem tripela wok yunit na wanpela o tupela wik. Wankain saplaia, wankain panel, 5-pela taim i narapela long kos bilong proses. Sapos yu givim nem long kategori long taim bilong askim, dispela bai sevim planti pas bihain.

Wanem samting i no wok gut long Minus 30

Kol i no isi tasol. Viskositi i go antap, taim bilong bekim i go antap long 25 milisekon i go antap long 200, na piksa i bagarap. Taim em i kol moa yet, wara kristal i go insait long wanpela 'smectic phase' na i stop long bekim olgeta, na lusim wanpela blak o waitpela skrin. Dispela em ol samting, i no tuning.

Antap long 'liquid crystal', kol i save bagarapim tripela narapela hap. Adhesive insait long FPC i save bruk bruk na bruk taim em i ben. Polariser adhesive i save go liklik na i go antap long ol arere. Draiva IC i nidim bikpela voltej long stat, olsem na kol stat em ples we ol feil i save bung. Wanpela trupela bikpela tempereja LCD -30C +80C kastom spesifikasen i tok moa long wanpela mak. Em i tok hamas seken bihain long pawa-ap long minus 30, bihain long tupela aua bilong sokim, wanpela stretpela piksa i mas kamap. Wanpela mak we i no gat taim bilong kamap orait gen i no tok wanpela samting.

Wanem samting i no wok gut long Plus 80

Hat em i moa hait bikos i no gat wanpela samting i save bagarap hariap. Olgeta tenpela digri bilong LED junksen tempereja i save daunim laip bilong beklait. Wanpela 'polarisa' we ol i kukim long 80 digri i save kamap yelo insait long planti mun, na i save tanim waitpela i kamap krim, na komplen i save kamap hap yia bihain. Voltej bilong 'liquid crystal threshold' i save senis wantaim tempereja, 'contrast' i pundaun, na 'temperature compensation' i kamap bikpela samting.

Ples we i hat tru insait long kar em i no 'dashboard' tasol em i senta konsol aninit long winskrin, we san i save san i go antap long 90 digri, na wankain eria i save go daun long 20 insait long 10-pela minit taim ea kondisen i wok. Dispela 'thermal cycling' i save bagarapim ol 'adhesive' na 'solder joints' moa long taim hat i save bagarapim oltaim. Olsem na bikpela tempereja tes i mas gat ol 'thermal shock cycles' wantaim wanpela namba we i stap, na i no stedi-stet damp hat tasol.

Vaibresen na Sok: Join i bagarap, i no panel

Ol tes bilong 'vibration' bilong ol kar i save kisim 10 i go inap 500 hertz long sampela g, we i luk olsem i no bikpela tumas. Tasol ol bagarap i no save kamap long glas o long wara kristal. Ol i save kamap long ol 'interface': 'bond' namel long FPC na glas, 'connector' namel long FPC na 'main board', ol 'solder joints' insait long 'backlight'.

Wanpela 'feil bond' i soim olsem i gat sampela 'vertical lines' o wanpela 'dead zone', em i nambawan 'repair trigger' long ol 'vehicle display'. Rot bilong stretim em i no ol glas we i tik moa tasol ol 'stiffeners', wanpela nupela 'bonding process', na FPC routing we ol i wokim bilong kisim 'strain'. Ol masin bilong wokim haus i save putim bikpela 'amplitude', liklik 'frequency' na 'stone impact', we i mekim wok bilong makim haus na 'cover' i bikpela samting moa long 'panel' yet.

I gat wanpela samting we ol i no luksave long en we i save kamapim guria: ol fan na ol spika. Ol i sindaun ausait long displei tasol insait long wankain haus, na kirapim straksa long wanpela 'fixed frequency' we inap long pundaun long wanpela FPC resonans. Dispela feilia i no save kamap long wanpela bens na i save kamap bihain long sampela tausen kilomita tasol. Traim dispela masin we yu bungim pinis, na i no panel tasol.

Wanem samting IATF 16949 i askim long wanpela 'display factory'

IATF 16949 em i no wanpela setifiket, em i wanpela sabmisen paket. Taim ol i putim long wanpela displei, as bilong en em PPAP set: ol rekot bilong disain we i karamapim ol droing na ol spesifikasen, proses flo daigram, PFMEA, kontrol plen, mesamen sistem analisis, na inisial proses kapabiliti stadi.

Measurement system analysis na capability em ol samting we ol faktori bilong soim ol samting i save pundaun long en. Hau ol i save skelim lait, 'chromaticity' na 'contrast', long wanem instramen, wantaim wanem kain 'repeatability' — planti i no inap bekim. Stadi bilong 'capability' i laikim ol statistiks long 300 pis bihain long narapela, na wanpela liklik program i no inap long kamapim 300 pis. Toktok i kamap olsem sapos ol data bilong bipo i kam long wanpela prodak bilong pletfom em i orait o sapos 'batch sampling' inap, na ol kastoma i no wanbel long dispela. Stretim pastaim long yu kolim, o ol sempel bai pinis pastaim long ol pepa wok i pinis.

Tripela samting we i pasim rot bilong tasim kar

'Capacitive touch' insait long kar em i hat moa long fon bikos long tripela as. Namba wan, EMC: ol saplai, ol mota na ol ignisen sistem we i gat swits i save redi strong inap long mekim 'sampling' i no stret. Namba tu, ol glav, we ol taim bilong kol long not i save mekim oltaim, na glav mode i save senisim pasin bilong pilim hevi. Namba tri, wara: ren long winskrin, ol dring i kapsait na ol presa wasa olgeta i kamapim wanpela film long kava we i save kirapim ol giaman tats.

Wanpela TFT LCM wantaim kapasitiv tats kastom disain olsem na i no inap stop long sapos ol i laikim tats. Em i mas kolim nem bilong 'touch controller', 'cover thickness' na 'water-rejection algorithm'. Sapos yu muvim kava long 1.1 i go long 2.0 milimita, dispela i save daunim 'sensitivity' na fosim 'retuning', na ol i mas testim 'water algorithm' taim em i wet na i no ritim wanpela 'datasheet' we i tok olsem wara i sapotim.

Wanpela tok lukaut: 'glove mode' i save baim 'sensitivity' wantaim 'gain', na 'gain' i save kostim 'noise immunity'. Long wanpela datasit dispela i gat tupela indipenden paramita; long yusim ol i wanpela wok tasol. Askim long 'signal-to-noise ratio' long 'glove mode' na i no askim long 'glove support'.

Raitim wanpela bikpela tempereja spesifikesen we i no inap long kisim sedo

Promis bilong wanpela saplaia long bikpela tempereja em i wanpela lain tasol: wok long minus 30 i go inap long plus 80. Dispela mak i gat tripela kain mining — i stap laip taim yu putim na i no bagarap, i soim na i no gat garanti long mekim wok, na i inapim olgeta spesifikesen. Ol samting i narapela i bikpela na tu ol prais i bikpela.

Brukim sentens i go long tripela. Toksave long 'storage range', 'range' we 'display' i mas wok long en, na ol samting we i stap insait long dispela 'range': liklik 'contrast', 'maximum response time', 'maximum brightness decay'. Putim wanpela 'cold-start' rikwaemen. Sapos ol i raitim olsem, wanpela saplaia i no inap long givim samting sapos em i lait, na inspeksen i gat ol mak we ol i ken skelim. Taim ol i makim wanpela TFT LCD modul saplaia, ol lain husat i laik kolim dispela tripela lain wanwan ol i save mekim ol gutpela wok bilong ol kar. Planti bilong dispela wok em ol i wokim long Saina, na wanpela gutpela saplaia bai givim ol PPAP evidens pastaim long yu tingting long askim long en.