Ntsiav tshuaj los yog smartphone kov screen tsis yog tsuas yog ib tug txhais tau tias ntawm displaying cov lus qhia, tab sis kuj yuav tswj lub tsev, uas yog tseem ceeb heev. Cov thawj xws zaub yog invented rov qab nyob rau hauv lub seventies ntawm lub xeem caug xyoo, thiab tau pib muaj kev koom siv nyob rau hauv gaming consoles thiab smartphones. Conventionally, tag nrho cov sensors yuav tau muab faib mus rau hauv capacitive thiab resistive. Resistive technology yog hnub no obsolete, tab sis siv lug txaus txo tau tus nqi ntawm qhov kawg tus nqi ntawm lub ntaus ntawv. Qhov no technology yuav siv ntawm ib tug kev sib cuag nrog lub screen tej yam ntau los yog tsawg dua yam khoom ntse ntse, tab sis thaum uas tsis muaj nqi thiab ib tug ntau yam ntawm kev tswj accessories xaus daim ntawv teev cov zoo ntawm tej pab kiag li lawm.
Capacitive kov ntxaij yog distinguished los ntawm qhov tseeb hais tias lub gadget tswj yuav tsuas yuav nqa tawm siv tej khoom muaj ib tug loj muaj peev xwm, kev tam sim no. Qhov kev tshuaj ntsuam nws tus kheej yog tsim raws li ib tug iav vaj huam sib luag loj nrog ib resistive cov khoom uas muaj ib tug txaus siab degree ntawm transparency. Thaum cov ntiv tes kov qhov screen, los yog lwm yam twj paj nruas uas ua tam sim no, to tam sim no tshwm sim, lub registered electrodes nyob rau hauv lub ces kaum ntawm lub panels. Capacitive kov ntxaij yog nruab nrog xws li ib tug, uas sau npe tus taw tes ntawm tangency. Yog li ntawd nws puv tawm ib tug kov mus rau ib tug tej yam taw tes. Capacitive kov ntxaij muaj txaus siab cia siab rau, uas nqa tawm tsawg kawg yog ob puas lab touches.
Nws yog ua tau yuav tau xav txog lwm cov kev xaiv ntawm no hom. Kov screen hom capacitive los ua tus progenitor ntawm ib tug technology xws li projection-capacitive. Ntawm no yog lub hauv paus ntsiab lus ntawm cov lag luam yog ua raws li ib daim phiaj ua hauj lwm ntawm electrodes situated nyob rau sab hauv sab ntawm lub screen. Ua ke nrog cov tib neeg lub cev lawv tsim ib tug capacitor, capacitance uas yog tsim ib tug kev hloov ntawm cov zaub xws li. Qhov no technology yog siv nyob rau hauv qhuav ntawm iPhone.
Capacitive kov ntxaij muaj ib tug xov tooj ntawm zoo. Lawv yuav pom tau tias nyob rau hauv sib piv mus rau resistive ua ntau tshwm tag. Ntawm cov hoob kawm, xws li ib tug kev sib piv, tus thawj nce, vim hais tias lawv muaj zoo zoo. Lawv muaj ntau dua cov nqi uas muaj kev cia. Rau lawv, yog tsis muaj yuav tsum tau rau calibration. Lub rhiab heev ntawm xws cov ntxaij vab tshaus yog ntau dua. Multi-touch capacitive kov npo txhawb multi-kov technology, uas tsis yog lub resistive.
Nws yog noteworthy tias cov qauv ntawm cov raug lub ntxaij vab tshaus txhua txhua xyoo yuav ntau thiab ntau mus siv cuag mus rau thaum xaus li rau tau txais kev pab, hnub no nws yuav tau ntau feem ntau pom nyob rau hauv cov nyiaj txiag versions ntawm cov ntsiav tshuaj thiab kov cov xov tooj. Lub tsuas drawback yog mas muaj teeb meem tsis muaj peev xwm mus ua hauj lwm nrog ib tug stylus, tab sis nws yog tsau. Raws li cov nqe lus piav capacitive kov cov ntxaij vab tshaus yuav hu ua tam sim no yog tus tseem pheej nyob rau hauv zus tau tej cov ntsiav tshuaj.