Projected Capacitive Touch Technology

Projected Capacitive Touch (PCT) thev naus laus zis yog cov cuab yeej siv hluav taws xob uas tso cai rau qhov tseeb dua thiab hloov pauv hauv kev ua haujlwm, los ntawm etching txheej txheej. Ib qho XY array yog tsim los ntawm etching ib txheej los tsim ib daim phiaj qauv ntawm electrodes, los yog los ntawm etching ob cais, perpendicular txheej ntawm conductive cov ntaub ntawv uas parallel kab los yog lem los tsim daim phiaj (zoo ib yam li pixel daim phiaj nyob rau hauv LCD zaub). Kev siv hluav taws xob rau cov array tsim ib daim phiaj ntawm cov capacitors.

Projected capacitive touch screen qauv zoo li cas?

Muaj ntau yam qauv hauv qhov projected capacitive technology. "Ib daim ntawv piled-up qauv" muaj X thiab Y electrodes piled ntawm ib daim ntawv. "Ib daim ntawv ob-sided qauv" muaj X thiab Y electrodes ntawm nws nto thiab nraub qaum ntawm ib daim ntawv feem. "Ob-daim ntawv-laminated qauv" muaj ob nplooj ntawv sib ntsib nrog electrodes nyob nruab nrab. Yog li, qhov projected capacitive sensor muaj X thiab Y electrodes, thiab muaj ntau txoj hauv kev los muab lawv ua ke.

Qhov projection capacitance sensing tshuab yuav muab faib ua ob hom: tus kheej capacitance thiab kev sib nrig sib capacitance.

Self capacitance tseem hu ua absolute capacitance. Nws yuav siv cov khoom paub zoo li lwm yam electrode ntawm lub capacitance. Cov khoom induces nqi nruab nrab ntawm lub sensing electrode thiab sensord electrode, thiab txiav txim siab txoj hauj lwm los ntawm kev soj ntsuam qhov kev hloov ntawm lub coupling capacitance. Txawm li cas los xij, yog tias nws yog ib qho kov, tsuas yog ib pab pawg ntawm kev tswj hwm tau txiav txim siab hauv x-axis thiab Y-axis cov lus qhia los ntawm kev hloov pauv, thiab cov kev sib koom ua ke kuj yog qhov tshwj xeeb. Yog tias muaj ob lub ntsiab lus kov ntawm lub vijtsam kov thiab ob lub ntsiab lus no tsis nyob hauv tib X kev taw qhia lossis tib y kev taw qhia, thiab muaj ob qhov kev sib koom tes hauv X thiab Y cov lus qhia raws li, plaub qhov kev sib koom ua ke. Pom tseeb, tsuas yog ob qhov kev sib koom tes yog qhov tiag, thiab ob qho tib si feem ntau hu ua "cov ntsiab lus dab". Yog li ntawd, tus kheej lub vijtsam capacitive tsis tuaj yeem paub qhov tseeb ntau kov.

Kev sib nrig sib capacitance tseem hu ua cross capacitance, uas yog tsim los ntawm kev sib txuas ntawm cov electrodes uas nyob ib sab. Thaum cov khoom hnov ​​​​mob ze rau ntawm txoj kab hluav taws xob los ntawm ib qho hluav taws xob mus rau lwm qhov, kev hloov pauv ntawm kev sib nrig sib capacitance yuav hnov. Thaum lub transverse electrodes xa tawm excitation signals nyob rau hauv lem, tag nrho cov longitudinal electrodes tau txais cov teeb liab nyob rau tib lub sij hawm. Nyob rau hauv txoj kev no, lub capacitance ntawm kev sib tshuam ntawm tag nrho cov transverse thiab longitudinal electrodes tuaj yeem tau txais, uas yog, lub capacitance ntawm ob sab dav hlau ntawm tag nrho lub vijtsam kov. Thaum tib neeg ntiv tes mus txog, lub peev xwm hauv zos yuav raug txo. Raws li ob-dimensional capacitance hloov cov ntaub ntawv ntawm lub vijtsam kov, qhov kev sib koom tes ntawm txhua qhov kov tau raug xam. Yog li ntawd, txawm tias muaj ntau lub ntsiab lus kov ntawm lub vijtsam, qhov kev sib koom tes tiag tiag ntawm txhua qhov kov tau suav tau.

Nqa ib tug ntiv tes los yog cov cwj mem hluav taws xob ze rau ntawm lub sensor qhov chaw hloov pauv hauv zos electrostatic teb. Lub peev xwm hloov pauv ntawm txhua tus neeg taw tes ntawm kab sib chaws tuaj yeem ntsuas kom raug txiav txim siab qhov chaw kov.

Kev siv daim phiaj tso cai rau kev daws teeb meem ntau dua vis-a-vis resistive thev naus laus zis, thiab tseem tso cai rau kev ua haujlwm ntau yam. Yog li, PCT qhov kev daws teeb meem ntau dua tso cai rau kev ua haujlwm txawm tias tsis muaj kev sib cuag ncaj qha, xws li cov txheej txheem txheej txheem tuaj yeem coated nrog cov txheej txheem insulating ntxiv, tseem ua haujlwm txawm tias nyob rau hauv cov tshuaj tiv thaiv, lossis tom qab huab cua thiab iav pov thawj.

Qhov zoo:

• Kov muaj nuj nqi ua haujlwm los ntawm cov neeg siv khoom nruab nrog cov khoom siv, suav nrog cov iav uas tiv thaiv cov iav mus txog 18 hli tuab.

• Ua haujlwm sab nraum zoov - hauv nag, daus, dej khov, thiab plua plav.

• Muaj tseeb tiaj pem hauv ntej nto ua tau yam tsis muaj bezel.

• Ua haujlwm nrog cov ntiv tes, hnab looj tes los yog cov cwj mem conductive.

• Ua haujlwm txawm tias iav yog khawb lossis tawg.

Qhov tsis zoo:

• Cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob yog qhov nyuaj dua, piv rau lwm cov thev naus laus zis

• Tsis muaj kev txhawb nqa kev ywj pheej stylus tag nrho

Technologies ntawm Touch Screen

Resistive Technology : Analog 4-wire Resistive, Analog 5-Wire Resistive, Analog 7-wire Resistive, Analog 8-wire Resistive, Nta ntawm resistive technology

Capacitive Technology: Nto Capacitive kov tshuab, Projected Capacitive kov tshuab