Touch screen chanchin .

Touch screen siam tumna hi EA Johnson-a’n kum 2015-a a sawi hmasak ber a ni a, a tichhuak hmasa ber a ni.1965. Kum 1970 chho tir lam khan touch screen hmasa ber chu Frank Beck leh Bent Stumpe, engineer te chuan an siam a, chu chu 1000 a ni.CERN 100 a ni.. physical product chu 1999-ah siam a ni a, hman a ni.1973. Resistive touch screen hmasa ber chu George Samuel Hurst chuan 1999 khan a siam a.1975Mahse, kum 1982 thleng khan siam chhuah leh hman a ni lo.