nea wɔahyɛ ho nkɔm no .Capacitive touch a ɛwɔ soro no .wɔ multi-nsateaa a wɔde ka adwuma. Saa ɔkwan yi so .Capacitive touch a ɛwɔ soro no .wɔ mfaso horow a ɛne hann a ɛkɔ soro, mmuae a ɛyɛ ntɛm ntɛmntɛm ne nkwa tenten. Nea enye wɔ ho ne sɛ: Sɛ ɔhyew ne ɔhyew sesa a, capacitance bo no bɛsakra, na ɛde adwumayɛ mu ahotɔ a enye aba na mpɛn pii no ɛrekɔ soro. Hwɛ screen no so mpɛn pii, na nhyɛ gloves a ɛyɛ mmerɛw a wode bɛka wo ho.
Wobetumi akyekyɛ capacitive screens a wɔahyɛ ho nkɔm no mu abien: Self-capacitance screens ne mutual-capacitance screens. Mutual-capacitance screen a ɛtaa ba no yɛ nhwɛsoɔ. Mfinimfini no yɛ electrode ahorow a wɔde ka kar ne electrode ahorow a wɔde gye nneɛma. The driving electrodes emit low-voltage and high-frequency signals and project them to the receiving electrodes to form a stable Electric current, when the human body touches the capacitive screen, because the human body is grounded, the finger and the capacitive screen form an equivalent capacitance, and high-frequency signals can flow into the ground through this equivalent capacitance, so that the amount of charge received at the receiving end no so tew bere a nsateaa no bɛn baabi a ɛde kɔ no, anyinam ahoɔden no so tew kɛse. Awiei koraa no, wɔkyerɛ beae a wɔde wɔn nsa aka no sɛnea current intensity a receiving terminal no nya no te.
Wɔde ITO a ɛwɔ ahwehwɛ no ani so na ɛyɛ electrode nhyehyɛe a ɛda fam ne nea ɛkɔ fam no. Saa electrode ahorow a ɛkɔ soro ne nea ɛkɔ fam yi yɛ capacitor a ɛwɔ fam. Saa capacitor yi na wɔtaa frɛ no self-capacitance, a ɛyɛ capacitance a electrode no kɔ fam. Sɛ nsateaa no de ne nsa ka capacitive screen no a, nsateaa no capacitance no bɛhyɛ screen no capacitance so, na ɛma capacitance a ɛwɔ screen no mu no yɛ kɛse.
Wɔ touch detection no mu no, self-capacitance screen no hu horizontal ne vertical electrode arrays no wɔ akyi, na ɛkyerɛ horizontal ne vertical coordinates no sɛnea nsakrae a ɛba wɔ capacitance mu no te ansa na touch no adu ne akyi, na afei ɛka bom yɛ planar touch coordinates. Ɔno ankasa-capacitance scanning kwan no yɛ pɛ sɛ projecting touch points wɔ .Touch Screen .kɔ x-axis ne y-axis akwankyerɛ so, na afei bu nsusuwii ahorow a ɛwɔ x-axis ne y-axis akwankyerɛ no mu no ho akontaa, na awiei koraa no, wɔde ka bom yɛ no coordinates a ɛwɔ touch point no mu.
Sɛ ɛyɛ biako-Point touch a, projections a ɛwɔ x{1}}axis ne y-axis akwankyerɛ no yɛ soronko, na combination coordinates no nso yɛ soronko. Sɛ touch screen no so nsa abien na ɛwɔ hɔ na nsɛntitiriw abien no nni x kwan koro no ara so anaasɛ Y kwan koro a, ɛnde nsusuwii abien na ɛwɔ x ne y kwan no so, na wɔaka coordinates 4 abom. Ɛda adi sɛ, coordinates abien pɛ na ɛwɔ hɔ ankasa, na abien a aka no taa frɛ no "ahonhommɔne nsɛntitiriw". Enti, ankasa-capacitive screen no ntumi nnya nokware multi-touch.
Mutual capacitance screen no nso de ITO di dwuma de yɛ electrode a ɛkɔ soro ne nea ɛkɔ fam wɔ ahwehwɛ no ani. Nsonsonoeɛ a ɛda ɛne ne ho-capacitance screen ntam ne sɛ capacitance bɛhyehyɛ baabi a electrode ahodoɔ mmienu twa mu, kyerɛ sɛ, saa electrode mmienu yi na ɛyɛ capacitance no nnua mmienu. Sɛ nsateaa no ka capacitive screen no a, ɛka coupling a ɛda electrode abien no ntam a ɛbɛn touch point no, na ɛnam so sesa capacitance a ɛda electrode abien no ntam no. Sɛ worehu mutual capacitance a, electrode ahorow a ɛkɔ soro no de excitation signals kɔ, na vertical electrodes no nyinaa nya signals bere koro mu. Saa kwan yi so no, wobetumi anya capacitance value a ɛwɔ intersection a ɛwɔ horizontal ne vertical electrodes nyinaa mu, kyerɛ sɛ, capacitance a ɛwɔ abien-dimensional plane a ɛwɔ touch screen no nyinaa mu. Sɛnea abien-dimensional capacitance nsakrae data a ɛwɔ .Touch Screen ., wobetumi abu coordinates a ɛwɔ touch point biara mu no ho akontaa. Enti, sɛ mpo touch points pii wɔ screen no so a, wobetumi abu nokware coordinates a ɛwɔ touch point biara mu no ho akontaa.
Mfaso a ɛwɔ mutual capacitance screen no so ne sɛ wiring kakraa bi na ɛwɔ hɔ, na ebetumi ahu na ama nsonsonoe a ɛda nkitahodi ahorow pii ntam no ayɛ kɛse bere koro mu. Self-Capacitance screen no nso tumi te nkitahodi ahorow pii nka, nanso esiane sɛ sɛnkyerɛnne no ankasa yɛ nea ɛyɛ kusuu nti, wontumi nyiyi mu. Bio nso, sensing scheme a ɛwɔ mutual capacitance screen no wɔ mfasoɔ a ɛwɔ ahoɔhare a ɛkɔ ntɛmntɛm ne ahoɔden a ɛba fam a wɔde di dwuma no mu, ɛfiri sɛ ɛtumi susu nodes nyinaa wɔ driving line so wɔ berɛ korɔ no ara mu, enti ɛtumi brɛ acquisition cycles dodoɔ ase 50%. Saa mmienu-electrode nhyehyeɛ yi wɔ dwumadie a ɛfa self-Shinelding abɔnten dede na ɛtumi ma nsɛnkyerɛnneɛ a ɛgyina pintinn wɔ tumi gyinabea pɔtee bi.
Sɛnea ɛte biara no, wɔde sɛnkyerɛnne nsakrae a ɛwɔ x electrode ne y electrode no ntam no kyekyɛ na ɛkyerɛ sɛnea wɔde wɔn nsa ka no, na afei wɔde akontaabu nhyehyɛe ahorow di dwuma de di saa sɛnkyerɛnne dodow a wɔasesa yi ho dwuma de kyerɛ xy nsusuwii a ɛwɔ touch point no mu.
