Ambient light (ALS)
Global positioning system (GPS)
Very useful in touch based Mobile Phones.
While on call and you bring the device near
your ear, Proximity Sensor detects it and
can turn off the screen to avoid accidental
touch of the screen by ear.
An ambient light sensor to portable
devices such as tablets, smart phones,
and laptops extends battery life and
enables easy-to-view displays that are
optimized to the environment.
The Global Positioning System (GPS) is a
satellite-based navigation system made
up of a network of 24 satellites placed
into orbit by the U.S. Department of
Defense. GPS was originally intended for
The accelerometer in mobiles (like the
iPhone) is used to measure the
orientation or vertical and horizontal
positioning of the phone. The most basic
application of this is the device knowing
when to alternate the view of the screen
depending on how you are holding it.
The digital compass that's usually based
on a sensor called magnetometer
provides mobile phones with a simple
orientation in relation to the Earth's
magnetic field. As a result, your phone
always knows which way is North so it
can auto rotate your digital maps
depending on your physical orientation.
A gyroscope is a device for measuring or
maintaining orientation, based on the
principles of angular momentum.
OSAMA KARIM KIDWAI