1. How the iPhone Works
s1200008 Kazuya Watanabe
January 27, 2013

2. About the iPhone (1)
In January 2007, Steve Jobs introduced the Apple iPhone.
Those features are plentiful. You can do these things.
1. To make and receive calls.
2. To watch movies.
3. To listen to music.
4. To browse the Web.
5. To send and receive e-mail and text messages.
In 2008, Apple introduced the second generation iPhone.
This iPhone has a GPS receiver. It lets you view map and
satellite data from Google Maps.

3. About the iPhone (2)
In 2009, Apple introduced the iPhone 3GS.
The iPhone 3GS have more storage capacity than earlier
iPhones.
They have a better camera that’s capable of taking still shots
and video at 30 frames per second.
They have a compass. This is usable when you look for a way.
In 2010, Apple introduced the iPhone 4.
The iPhone 4 sports two cameras on the front and the back.
The iPhone 4 has a retina display with a better resolution
than earlier iPhones.

4. iPhone Touch Screen
The iPhone’s touch screen is a little different from the others
currently on the market.
It can detect multiple touch points simultaneously.
But the iPhone requires you to use your fingers.
The iPhone’s sensors monitor changes in the reflection of waves.
These can be sound waves or beams of near-infrared light.
Sensors feel the infrared light of the finger and points the place.

5. Multi-touch Systems
The iPhone’s touch-sensitive screen includes a layer of capacitive
material.
The iPhone’s capacitors are arranged according to a coordinate
system and can sense changes at each point.
This allows the iPhone to determine the location and movement of
simultaneous touches in multiple locations.
The iPhone works only if you touch it with your fingertip because
of its reliance on this capacitive material.

6. iPhone Processor
The iPhone’s processor is central to correctly interpreting input
from the touch screen.
The capacitive material sends raw touch-location data to the
iPhone’s processor.
These things are happening :
1. Signals travel from the touch screen to the processor as
electrical impulses.
2. The processor uses software to analyze the data and
determine the features of each touch. If you move your finger,
the processor calculates the difference between the starting
point and ending point of your touch.
3. The processor uses its gesture-interpretation software to
determine which gesture you made. It combines your physical
movement with information about application when you
touched the screen.
4. The processor relays your instructions to the program in use.
If the raw data doesn’t match any applicable gestures or
commands, the iPhone disregards it as an extraneous touch.