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How touch screen technology work's??

  Touchscreen technology

          
 
    We use our Phone regularly ..and check frequently for notifications .do you ever asked yourself that how this touchscreen display works??..
In feature every electronic gadgets and home appliance is with touchscreen technology only ...
We will try to find how many touchscreen technology's are available...
 In 1965-1967 sir reachod EA Gohnson invented first touchscreen system that used for air traffic control...
Dr.samuel harst developed first touchscreen sensor...
Let's deep dive into touchscreen technology...

Ther are 4 type's of touchscreen technology's are there ...
1. Resistive  touchscreen system
2. Capacitive touchscreen system
3. Infraded touchscreen system
4. Surface coustic wave touchscreen system

**1 resistive touchscreen system..
        
When it come's to resistive touchscreen system there are two layers one is conductive layer and other one resistive layer and in between a spacers arrangement are there ....this layers placed one after other first 
Conductive layer upon resistive layer.....
Working....                                                           
Conductive layer and protective layer is very flexible .. when we try to touch the screen then conductive and protective layer bends and touches the resistive layer so the flow of current take place ....then cpu detects the exact point  where the current flows ...by using this technology we face some disadvantages like we can operate by single touch only...so zooming not available ...this used in olden mobile phones and also used some ATM machines ..now a days all touchscreens are updating to capacitive touch screen we cannot see this technology in future....
2. capacitive touch screen system.               

We use modified copper or indium tin oxide as electronic layer on 4 sides we have 4 fixed electrodes...this total system is protected by protective layer ....
Working...                                                          
As you can see electronic layer on protective layer .. electrodes apply certain specific voltage and we know human's are good electric conductor's so when we try to touch the screen then the current inside the electronic layer can pass through our body .....then cpu immediately detects at which point , exact location with the help of electrodes...

We can operate through multiple touches ...this technology is used in our mobiles and other electric gadgets , ATMs,home appliances..
We feel good touch experience ,we can also apply another protective layer(screngourd)...it can work in underwater.....and long lasting life time...
**3 infrared touchscreen system.     
              
In this technology we use LED'S left and right and light detecting photo cells on top and bottom ...
Working ...                                                      
When it's come to working the light rays coming from LEDs enter in photocells when we touch the screen the flow of light get distrub ...then immediately cpu detects the Chang of flow of light...

** 4.Surfacecoustic wave touchscreen system    
In this technology one side with ultrasonic sound meter and other side ultrasonic sound receiver....
Working...                                                        
The ultrasonic meter sends ultrasonic waves to ultrasonic receiver when we touch the waves get distrubed so cpu detect the touch point using this technology .....
Prasent we use mostly capacitive touchscreen system only....
I hope you learn something new ...thank you

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