Tsev > Xov xwm > Ntsiab lus

Yuav Ua Li Cas Thiaj Li Cov Hluav Taws Xob Cov Hluav Taws Xob

May 04, 2017

Touchscreens tau siv ntau hom tswv yim ntau tshaj plaub lub xyoo dhau los txheeb xyuas cov khoom ntiv tes ntawm qhov kev ntsuas ntawm cov khoom siv, kho qhov muag, thiab hluav taws xob. Hnub no lub tshuab hluav taws xob hluav taws xob muaj peev xwm tau pom tau tias yog ntau txoj hau kev thiab ntau txoj kev paub txog tib neeg kev sib tham.

Tus capacitor yog ib qho hluav taws xob hluav taws xob, uas nyob rau hauv nws daim ntawv nyuaj, yog li ntawm ob txoj hlua hluav taws xob sib cais los ntawm kev sib txawv insulating. Tam sim no tus (DC) ntawm hluav taws xob tsis tuaj yeem siv qhov sib txawv no, tab sis tam sim no hloov tau (AC) yuav ua kom quab yuam kom khiav tawm ntawm ib sab mus rau lwm. Qhov nplaim ntawm ib lub screenshreen yog pam nrog ib daim phiaj ntawm electrodes. Qhov chaw uas peb ntiv tes tawm los so, kev sib cuag tseem yog tsim thiab AC lub tam sim no tau tsim nyob rau hauv cov cuab yeej ua kom haj yam muaj nyob hauv peb lub cev-uas pabcuam kev sib txawv thiab ua tiav hauv Circuit Court.

"Cov tibneeg yog cov neeg ua haujlwm zoo," Neil Gershenfeld, Director of MIT's Center for Bits thiab Atoms, yog li siv peb cov ntiv tes kaw qhov hluav taws xob ua rau nws yooj yim los mus tshawb xyuas tib neeg kev sib raug zoo nrog kev siab ncaj. Yog tias qhov chaw nyob ntawm touchscreen yog xav paub txog AC tam sim no, "muaj kom tau txoj kev rov qab [hluav taws xob]," hais tias Gershenfeld. Rau lub touchscreen ntawm ib tug handheld ntaus xws li smartphone, "koj nyob nraum tuav nws nrog rau lwm txhais tes," thiab qhov no ua tiav cov hluav taws xob lub voj rau lub backside ntawm lub ntaus ntawv, uas yog hluav taws xob grounded. Yog tias qhov touchscreen yog ib feem ntawm kev teeb tsa, xws li ATM, qee qhov chaw ntawm peb lub cev yuav muaj kev sib txuas nrog lub hauv paus hluav taws xob. "Nws yog ib qho nyuaj heev (rau peb lub cev) kom tsis txhob ua ib daim ntawv sib chwv hauv av," Gershenfeld hais tias, qhov ntawd yuav ua rau tib neeg (lossis lawv cov ntiv tes) kaw lub voj voos hluav taws xob rau cov ntxaij vab tshaus loj.

Yog hais tias nws suab tswb kom muaj hluav taws xob dua los ntawm koj lub cev, tsis txhob txhawj. AC currents nyob rau hauv touchscreens yog nyob rau hauv theem rau natural charge conduction nyob rau hauv peb lub cev-thiab lub tiag tiag Revolution thiab nqi hluav taws xob niaj hnub touchscreens lies nyob rau hauv lub ceev ntawm lawv cov lus teb. "Lub hero unsung yog microcontroller," notes Gershenfeld. Qab txhua tus electrode ntawm touchscreen grid lus dag "ib qho microcontroller embedded uas muaj ib lub pob zeb ntawm nanoseconds." Nws yog lub sij hawm no lub sij hawm sai uas pab cov niaj hnub smartphones kom muaj kev sib cuam tshuam zoo nrog tib neeg kov, thiab nws yog qhov kev vam meej uas tau tsav lub nce kev nce hau hais Ntawm touchscreens nyob rau hauv xyoo tsis ntev los no.Tam sim no, qhov nruab nrab touch screen muaj; tft 7, 7 lcd lossis gps 7,

Capacitive sensing tau coj mus rau kev npaj txhij txog tshiab nrhav, xws li kev ua lub siab ua siv rau kev tsheb kom paub txog qhov chaw ntawm lawv cov neeg nyob, ua lag luam los ntawm Gershenfeld's kuaj thiab raws li ib hom kev ntsuam xyuas, uas siv hluav taws xob. Nrog me ntsis kev sib koom tes ntawm tus txiv neej thiab lub tshuab, cov ntxig touch-sensitive tau qhib lub qhov rooj mus rau ib lub party ntawm tshiab sib tham sib yees.