Sensors have been used in cellphones since they were invented but if we talk about SmartPhones , Sensors are the thing thats make a SmartPhone Smart .. With the help of various sensors, man-made devices are able to feel the world like God-made creatures do..
The most popular sensors which most SmarPhones have & their basic functions are
An accelerometer measures proper acceleration & detects angle.. When the phone is rotated for 90 degrees, it can automatically switch between vertical display & horizontal display.When we move the phone up and down, the accelerometer sensor sends the corresponding information to CPU and by which softwares can control the menu selection, flipping, image switching and other operations.
Gyroscope sensors measures angular velocity (rqotational angle).. A Gyroscope is Spinning wheel or disc in which the axis of rotation is free to assume any orientation. In racing and other games, accelerometer can even replace the arrow keys, to turn, accelerate, and break the vehicle by roating the phone at different angles, thus making the game more entertaining..
Proximity Sensors :
Proximity sensors in SmartPhones are mainly used to smartly regulate the Phone by detecting nearby objects without any physical contact.When the mobile phone is placed near the ear during a phone call, it can automatically turn off the screen and backlight, to extend the battery life. The touch screen is also disabled at the same time, to prevent unintentional hang up of the call by miss touching on the screen.
Finger Print :
As the demand increases for security of personal data, fingerprint recognition technology has been applied to latest SmartPhones. The sensor capture a specific fingerprint then quickly analyze the fingerprint and certifies the user..
Pedometer sensors are not available on all smartphones .. Pedometer counts each step a person by detecting motions.
Light Sensors :
Light Sensors are typically used to adjust your display brightness automatically by sensing light..
There are many other sensors available in SmartPhones like Compass Sensors (Megnetometer),Gravity Sensors, Image Sensors etc.As the sensors have achieved substantial improvement in the size, cost and accuracy SmartPhones are getting smarter day by day ..
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