Aaj kal ke phones mein capacitive touchscreens use hoti hain.
Ye screen do layers mein divided hoti hai. Pehla hai Touch screen digitizer aur dusri hai iske peeche lagi LCD ya Amoled screen. Jo Touch digitizer ke front me hota hai, jisse scratch resistant glass jesse gorilla glass ke nam se market kiya jata hai, iske upr Indium Tin Oxide ki coating hoti hai.
Jo isse conductive bnati hai. Uss ke piche, 2 layers hoti hai jiske upar ek baal jitni patli transparent vertical aur horizontal conductive lines hoti hai, Vertical lines ko driving lines kehte hain jisme constant electric current flow krta rehta hai, isse, ek electric filed bnati hai.
Horizontal lines ko sensing lines kehte hain. jo electric charge ke change ko detect karti hain. Ye do no lines mil kar ek electro static grid bnati hai. Ye sabhi layes ek dusre ke sath chipka di jati hai jisse banta hai touchscreen digitizer. Is sath ek Toch screen processor lgaya jata hai jiska kaam hota hai, physical touch ko digital signal mein convert krna. Issi digitizer ke peeche ek LCD ya AMOLED screen lga di jati hai.
Jab aap screen ko touch karte ho, toh Humari skin mein mojood positive aur negative charged atoms, touch digitizer ke ek specific point ki electrostatic field ko change kr dete hai. Iss chnage ko touch digitizer processor detect krta hai, aur ye process krta hai ki screen ke upr grid par apne kahan touch kiya hai, auri iske X aur Y coordinates ka data Phone me lage processor tak bhejta hai.
Phone ka processor in touch inputs ko screen par dikhae jaen vale visuals ke actions me convert krta hai jisse apka touch register ho jata hai aur ap aisi interesting video tak phoch jate ho.
History of touchscreens
1965 mein E.A. Johnson ne touchscreen interface ka concept record kiya tha. Tab, Malvern, England mein, Royal Radar Establishment ke engineer Eric Arthur Johnson ne traffic control ke liye ek touchscreen develop karne ka plan banaya.
E.A. Johnson ne touchscreens ke baare mein ek detailed aur extensive paper likha aur publish kiya. Is paper mein touchscreen technology ke prototypes aur diagrams ke zariye samjhaya gaya tha ki yeh technology kaise kaam karti hai. 1969 mein, E.A. Johnson ko apne invention ke liye patent bhi mil gaya.
1970 mein Dr. G. Samuel Hurst ne resistive touchscreens ko banaya, jo capacitive touchscreens ke pehle invent hone ke bawajood initial years mein zyada popular hue. Dr. Hurst ne yeh technology lagbhag accident se develop ki thi. Tab, Hurst University of Kentucky mein research kar rahe the, aur unhone apne design ko patent karne ki koshish ki taaki is accidental discovery ko replicate hone se bachaya ja sake. Lekin, us waqt iska scientific value sirf lab tak hi seemit lag raha tha.
1970 mein Oak Ridge National Laboratory wapas aane ke baad, Hurst ne ek after-hours investigation shuru ki. Unhone dekha ki ek conductive cover sheet screen ke liye zaroori cheez thi. Yeh breakthrough resistive touch technology ke development ki raah khol gaya, jise unhone aur unki team ne elographics naam diya. Unhone finally pehli curved glass touch interface ko patent bhi kiya.
1982 mein, University of Toronto ke Nimish Mehta ne pehla human-controlled multitouch device banaya. Uske baad, Myron Krueger, ek American computer artist, ne ek optical system develop kiya jo hand gestures ko capture kar sakta tha. Yeh gesture interaction ko pioneer kiya gaya.
1980s ke early years mein touchscreens ko commercialize kiya gaya. 1984 mein, Bell Labs ke Bob Boie ne pehla transparent multitouch screen interface create kiya. Is innovation ne multitouch technology ko significantly advance kiya, aur users ko visuals ko apne fingertips se modify karne ka mauka diya.
2007 mein, Apple ne pehli baar touchscreen smartphone launch kiya, jo success hua. iPhone ka design compact aur user-friendly tha aur isme minimal multitouch functionality thi. Is wajah se, users ek finger se shift key ko hold nahi kar sakte the aur doosre finger se capital letter type nahi kar sakte the keyboard mode mein. Lekin, iPhone mein zooming ke liye pinching capability thi, jo researcher Krueger ne invent ki thi.
Pehla iPhone touchscreen technologies ko worldwide popular banane mein madadgar sabit hua.
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