Tus qauv ntawm Capacitive Touch Screen

yooj yim qauv

Lub hauv paus qauv ntawm lub capacitive kov screen yog: lub substrate yog ib txheej plexiglass, ib txheej ntawm pob tshab conductive zaj duab xis yog uniformly forged rau sab hauv thiab sab nrauv ntawm lub plexiglass, thiab nqaim thiab ntev lub khob hliav qab yog muab tso rau ntawm plaub fab. ntawm pob tshab conductive zaj duab xis nyob rau sab nrauv. electrode. Nws txoj hauv kev ua haujlwm yog: thaum tus ntiv tes kov lub capacitive touch screen, lub teeb liab zaus txuas nrog rau qhov chaw ua haujlwm. Nyob rau lub sijhawm no, tus ntiv tes thiab qhov chaw ua haujlwm ntawm lub vijtsam kov tsim lub coupling capacitor, uas yog sib npaug rau tus neeg xyuas pib, vim tias muaj cov teeb liab ntau zaus ntawm qhov chaw ua haujlwm. Ib qho me me tam sim no yog kos ntawm qhov kov. Qhov me me tam sim no ntws los ntawm cov electrodes ntawm plaub fab ntawm lub vijtsam kov. Tam sim no ntws los ntawm plaub lub electrodes yog proportional rau linear nrug ntawm tus ntiv tes mus rau plaub fab. Los ntawm kev suav, tus nqi sib koom tes ntawm qhov chaw sib cuag tuaj yeem tau txais.

Lub capacitive kov npo tuaj yeem pom tau yooj yim raws li lub vijtsam uas muaj plaub txheej ntawm cov ntxaij vab tshaus sib xyaw: txheej txheej sab nraud yog txheej txheej iav tiv thaiv, ua raws li txheej txheej txheej txheej, txheej thib peb yog cov iav tsis siv tshuaj, thiab plaub txheej txheej sab hauv. Nws kuj yog ib txheej conductive. Lub innermost conductive txheej yog lub shielding txheej, uas plays lub luag hauj lwm ntawm shielding lub sab hauv hluav taws xob signals. Cov txheej txheem nruab nrab yog qhov tseem ceeb ntawm tag nrho lub vijtsam kov. Muaj cov coj ncaj qha rau ntawm plaub lub kaum sab xis lossis sab kom pom qhov chaw ntawm qhov taw tes kov.

Cov txheej txheej saum toj kawg nkaus yog tempered iav los yog polyethylene terephthalate (PET). Qhov zoo ntawm PET yog tias lub vijtsam kov tuaj yeem ua kom nyias, thiab ntawm qhov tod tes, nws yog pheej yig dua li cov ntaub ntawv yas thiab iav uas twb muaj lawm. Cov txheej insulating yog iav (0.4-1mm), organic zaj duab xis (10-100um), nplaum, thiab cua txheej. Cov txheej tseem ceeb tshaj plaws yog indium tin oxide (ITO) txheej. Cov tuab tuab ntawm ITO yog 50-100nm, thiab nws cov ntawv tsis kam yog nyob rau hauv thaj tsam ntawm 100-300 ohms. Cov qauv peb-dimensional ntawm cov txheej txheem ITO muaj kev cuam tshuam zoo rau lub capacitive touch screen, uas yog ncaj qha cuam tshuam rau ob qho tseem ceeb capacitance tsis ntawm lub vijtsam kov: inductive capacitance (ntiv tes thiab sab sauv ITO) thiab kab mob cab (nruab nrab ntawm sab sauv thiab qis ITO, thiab qhov sib txawv ntawm qhov qis ITO thiab cov zaub screen. ntawm).

Cov qauv ntawm lub capacitive touch screen yog tsuas yog rau phaj pob tshab zaj duab xis lub cev txheej ntawm lub iav npo, thiab tom qab ntawd ntxiv cov iav tiv thaiv sab nraud ntawm tus neeg xyuas pib. Cov iav ob chav tsim muaj peev xwm tiv thaiv cov neeg xyuas pib txheej thiab cov sensor, thiab lub teeb xa hluav taws xob ntau dua. Muaj peev xwm txhawb nqa ntau qhov kov.

Lub capacitive kov npo yog plated nrog ntev thiab nqaim electrodes ntawm tag nrho plaub sab ntawm lub vijtsam kov los tsim ib qho hluav taws xob qis AC hluav taws xob hauv lub cev conductive. Thaum kov lub vijtsam, vim yog lub zog hluav taws xob ntawm tib neeg lub cev, cov ntiv tes thiab cov neeg xyuas pib txheej yuav deformed.

Capacitive kov npo

Capacitive kov npo

Raws li ib tug coupling capacitor, lub tam sim no tawm los ntawm plaub-sab electrode yuav ntws mus rau qhov sib cuag, thiab lub zog tam sim no inversely proportional rau qhov kev ncua deb ntawm tus ntiv tes thiab cov electrode. Tus maub los nyob tom qab lub vijtsam kov yuav suav qhov piv thiab lub zog ntawm qhov tam sim no kom raug xam qhov chaw ntawm qhov kov taw tes. Ob chav iav ntawm lub capacitive touch screen tsis tsuas yog tiv thaiv cov conductors thiab sensors, tab sis kuj tiv thaiv sab nrauv ib puag ncig los ntawm kev cuam tshuam rau lub vijtsam kov. Txawm hais tias lub vijtsam yog qias neeg, plua plav lossis roj stains, lub capacitive kov lub vijtsam tseem tuaj yeem suav qhov tseeb ntawm qhov kov.

Txij li thaum lub capacitance sib txawv nrog rau qhov chaw sib cuag thiab dielectric ntawm nruab nrab, nws stability tsis zoo, thiab drift phenomenon nyhav tshwm sim. Qhov no hom ntawm kov screen yog tsim rau lub debugging theem ntawm kev loj hlob system.