Mfundo ntchito yotchinga capacitive kukhudza

The working principle of capacitive touch screen

Kuwunika mwachidule

Mawonekedwe owoneka bwino amafunika kuzindikira kukhudza kambiri powonjezera ma elekitirodi amtundu umodzi. Mwachidule, chinsalucho chimagawika m'magawo awiri, ndipo magulu angapo a capacitance amagwirira ntchito pawokha, kotero mawonekedwe a capacitive amatha kudziyimira pawokha Magwiridwe amtundu uliwonse amapezeka, ndipo atakonzedwa, kukhudza kosiyanasiyana kumangodziwika.

Njira yolumikizira Capacitive technology CTP (Capacity Touch Panel) imagwiritsa ntchito kulowetsedwa kwa thupi kuti ligwire ntchito. Chophimba cha capacitive ndichowonekera pazenera zinayi. Pakatikati ndi cholumikizira pazenera lagalasi chilichonse chimakutidwa ndi chingwe cha ITO (Nano Indium Tin Metal oxide). Gawo lakunja ndikoteteza kwa galasi la silika lokhala ndi makulidwe a 0.0015mm okha, komanso zokutira za ITO. Monga malo ogwirira ntchito, maelekitirodi anayi amachokera kumakona anayi, ndipo mkati mwa ITO ndiye gawo lazenera kuti muwonetsetse malo ogwira ntchito.

Wogwiritsa ntchito akagwira chophimba cha capacitive, chifukwa chamagetsi amthupi la munthu, chala cha wogwiritsa ntchito komanso mawonekedwe ake amapangira cholumikizira. Chifukwa malo ogwirira ntchito amalumikizidwa ndi chizindikiritso chapamwamba kwambiri, chala chimatenga kamphindi kakang'ono, kamene kamayenda kuchokera kumakona anayi azenera. Zomwe zikuyenda kupyola maelekitirodi anayi ndizoyenera kutengera kutalika kwa chala chala mpaka ngodya zinayi. Wowongolera akuwerengera molondola magawanidwe anayi apano molondola. Itha kufikira 99% molondola ndipo imakhala ndi mayankho ochepera 3ms.

Pulojekiti Yoyenera

Kukhudza ukadaulo wa gulu capacitive gulu The ntchito capacitive kukhudza nsalu yotchinga ndi etch osiyana zigawo ITO conductive dera zigawo ziwiri za on kuyanika ITO conductive galasi. Mitundu yokhazikika pamitundu iwiriyi ndiyofanana, ndipo imatha kuwonedwa ngati ma slider omwe amasintha mosiyanasiyana mu ma X ndi Y mayendedwe. Popeza nyumba za X ndi Y zili m'malo osiyanasiyana, mphindikati ya capacitor imapangidwa pamphambano. Chotsatsira chimodzi chitha kugwiritsidwa ntchito ngati chingwe choyendetsa, ndipo chimzakecho chimatha kugwiritsidwa ntchito ngati chingwe chodziwira. Pakadali pano pakadutsa waya umodzi pamzere woyendetsa, ngati pangakhale chizindikiro cha kusintha kwa capacitance kuchokera kunja, zimapangitsa kusintha kwa ma capacitance pamtundu wina wa waya. Kusintha kwa mtengo wodziwika wa capacitance kumatha kuyezedwa ndi makina amagetsi omwe amalumikizidwa nawo, kenako nkukhala chizindikiro cha digito ndi wolamulira wa A / D kuti makompyuta azigwiritsa ntchito masamu kuti apeze malo (X, Y) olamulira, ndi ndiye mukwaniritse cholinga chokhazikitsa.

Pogwira ntchito, wowongolera sequentially amapereka zamakono pamzere woyendetsa, kotero kuti gawo lamagetsi limapangidwa pakati pa mfundo iliyonse ndi waya. Kenako jambulani mzati wazolowera ndi mzati kuti muyese kusintha kwa capacitance pakati pama electrode ake, kuti mukwaniritse malo okhala ndi mfundo zingapo. Chala kapena cholumikizira chikayandikira, woyang'anira amazindikira mwachangu kusintha kwa capacitance pakati pa mfundo yolumikizira ndi waya, kenako ndikutsimikizira momwe akukhudzidwira. Mtundu woterewu umayendetsedwa ndi seti ya ma AC, ndipo mayankho ake pazenera lakukhudzidwa amawonedwa ndi ma elekitirodi olamulira enawo. Ogwiritsa ntchito amatcha ichikuwolokakupatsidwa ulemu, kapena kuyerekezera koyerekeza. Chojambuliracho chimakutidwa ndi X ndi Y axis ITO. Chala chikakhudza pamwamba pazenera lakumverera, kuchuluka kwa capacitance pansi pamfundo kumawonjezera kutengera mtunda wokhudza kukhudza. Kujambula mosalekeza pa sensa kumazindikira kusintha kwamphamvu ya capacitance. Chip chowongolera chimawerengera malo okhudza ndikuwanena ku processor.


Nthawi yamakalata: May-17-2021