1. History and Application
1.1. 1965 first touch screen
1.2. 1984 Casino AT-550 watch
1.3. 1993 first phone using multi-touch screen technology-Simon
1.4. 1998figerworks
1.5. 2002 Microsoft Tablet PC
1.6. 2007 iPhone
1.7. 2008 first touch-screen ATM
1.8. 2010 iPad
2. Capactive Touch Screen
2.1. Advantages
2.1.1. •Multi touch support available
2.1.2. •Visibility good even in sunlight
2.1.3. •Highly sensitive to finger touch leading to ease of use
2.1.4. •Not prone to dust particles
2.1.5. •Glossy look and feel
2.2. Disadvantages
2.2.1. •Need to have atleast 5% humidity to achieve capacitive effect
2.2.2. •More expensive than Resistive touch screen
2.2.3. Doesn't work with inanimate objects/fingernails/gloved fingers
2.3. Principle
3. Types
3.1. Resistive Touch Screen
3.1.1. Advantages
3.1.1.1. •Relatively cheaper
3.1.1.2. •Can operate with any pointing devices like stylus, pen, nail etc
3.1.1.3. •Can operate at any level of humidity
3.1.1.4. •Ease of use, as it could be used even with winter gloves on
3.1.1.5. •Very useful for people using handwriting recongition system
3.1.1.6. •More accurate than capacitive touch screen
3.1.2. Disadvantages
3.1.2.1. •Multi touch support not available
3.1.2.2. •Highly sensitive
3.1.2.3. •Poor visibility in sunlight
3.1.2.4. •Screen, being sensitive at the upper layer, can be more vulnerable to scratches!
3.1.3. Principle