A hnuah chuan .Capacitive touch screen a awm bawk.Touch signal a dawng a, touch data chu electrical pulse-ah a chantir a, chu chu 1000-ah a thawn chhuak a ni.Touch screen a ni a .Control IC chu processing atan hman a ni. Signal chu low-noise amplifier LNA hmangin a amplified hmasa a, chutah chuan analog-to-digital conversion leh demodulation hmangin a amplified a, a tawpah chuan data processing atan DSP-ah a thawn leh a ni.
A Capacitive touch screen a awm bawk.A tlangpuiin M+N (M column leh n rows) physical a nei a.Capacitive touch sensor te pawh a awm bawk.. M+N interlaced sensor te hian M*n capacitive sensing point an siam a. User kut zungtang chuan touch screen a hnaih chuan a capacitance chu a inthlak danglam zel ang. Sensor inkar hlat zawng (chu chu, a kianga row emaw column emaw inkar hlat zawng) chu millimeter tlemte vel a ni tlangpui a, chu hlat zawng hian touch screen-a physical resolution m*n a tichiang a ni.
a coordinate system chu .Capacitive touch screen a awm bawk.module a awm em?Tin, LCD module pawh a danglam vek bawk. LCD module pakhata pixel coordinate te chu a tlangpuiin a resolution hmangin an teh thin. Entirnan, WVGA screen hian resolution 800*480 a nei a, chu chu line khatah RGB pixels 480 nei line 800 a awm tihna a ni. Chutiang chuan hmun bik chu x leh y lam hawia pixel points (x, y) hmangin a hriat theih a ni. ChumiCapacitive touch screen module a awm bawk.Coordinate system chu a original physical size angin X leh Y direction-ah a ruat thin. Input leh output operation dik leh dik loh hriat chian nan coordinate system pahnih inkarah hian mapping method tling tak a awm tur a ni.
Chuvangin, touch screen control IC-a DSP processor chuan 100 inkarah pixel mapping conversion a tih a ngai a ni.Capacitive touch screen module a awm bawk.leh data hmuh chhuah chunga LCD module chu, chutiang chuan touch screen-a user-in touch point a neih chu user-in a point a nih leh nih loh a hriat theih nan.
Chu bakah, touch coordinate-te stability vawng reng tur chuan touch screen control IC chuan touch point-a jitter chu a process belh a ngai a, chutah chuan finger jitter leh capacitance data noise te pawh a tel a, coordinate-te smoothing theihna tur coordinate inthlak dan angin low{{0}pass filter-a filter coefficient pawh thlak a ngai a ni. Deal nen.
A tawp berah chuan data chu host-ah i thawn hmain software hmangin data chu i thlir hmasa tur a ni a, eng function nge touch tan eng atan nge hman tih i hre hmasa tur a ni. Hetiang hian screen-a khawih tawhna hmun lian leh te, a pianzia leh a awmna hmun hriat a ngai a ni. A tul chuan processor pawhin chutiang bawka touch chu group hrang hrangah a buatsaih ang. User chuan finger a move chuan processor chuan user touch start leh end point inkar danglamna chu a chhut chhuak thin.
