The document provides an overview of various sensors used in smartphones, including accelerometers, gyroscopes, and proximity sensors, along with their functionalities and common applications. It highlights how these sensors measure motion, orientation, and environmental conditions, contributing to the device's capabilities and appeal to consumers. Additionally, it mentions other sensors like ambient light sensors and fingerprint sensors, which enhance user experience and security.

1. Sensors in smartphone
Presented by; Presented to;
Kamal Jeet Mr k srinavasa rao
B.tech (ECE) 3rd Dept. of ECE
MUR14O1264

2. Contents
 Overview
 Different sensors in smartphone
 Accelerometer
 Gyroscope
 Proximity sensor
 Common uses of other sensors

3. Overview
 It measure motion, orientation, and various environmental
conditions.
 Attracts the buyer
 Smart work by sensors
 Manufacturers became competitors

4. Different sensors in smartphone

5. Accelerometer
 Capacitive type hardware sensor
 Measures the acceleration force in m/s2 that is applied to a device on all three
physical axes
 Common uses like motion detection (shake, tilt, etc.)

6. Microstructure of Accelerometer

7. Gyroscope
 Measures angular rate using Coriolis effect
 Similar to accelerometer
 Measures a device's rate of rotation in rad/s around each of the three physical
axes (x, y, and z)
 Common uses like rotation detection (spin, turn, etc.)

8. Gyroscope Structure

9. IR based proximity sensor
 Working principle

10.  Obstacle Sensing Circuit or IR Sensor Circuit
 common use phone position during a call

11. Common uses of other sensors
 Ambient light sensors used for Controlling screen brightness.
 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.
 Fingerprint sensor changed the smartphone security

12. References
 https://www.techulator.com/resources/9421-Overview-sensors-used-
smartphones-tablets.aspx
 https://developer.android.com/guide/topics/sensors/sensors_overview.html
 https://www.google.co.in/search?q=different+sensors+in+smartphones&rlz=1C1
CHZL_enIN732IN732&espv=2&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi97
KO48a3TAhUFTrwKHf9RAe4Q_AUIBigB&biw=1366&bih=613
 http://www.instrumentationtoday.com/mems-accelerometer/2011/08/
 http://www.electronicshub.org/ir-sensor/
 http://www.displaymate.com/AutoBrightness_Controls_2.htm