Every time I look at my phone,
I see that it contains various sensors.
The functions of these sensors are not all clear.
Today, I will list the various sensors found in mobile phones.
The arrangement is based onmost commonly used -> least commonly used.
Generally, the more sensors there are, the higher the price.
|
Sensor Type |
Core Function |
Corresponding Application Scenarios |
|
Beidou / GPS Positioning Sensor |
Receives satellite signals to obtain geographical location and speed information. |
Map Navigation (Amap / Baidu Maps), delivery / ride-hailing positioning, exercise trajectory recording, location sharing, check-in. |
|
Fingerprint Sensor |
Identifies user fingerprint characteristics. |
Fingerprint Unlock, Fingerprint Payment (WeChat / Alipay), fingerprint encrypted files / apps, fingerprint authorization operations (e.g., confirming transfers). |
|
Vibration Sensor (Piezoelectric) |
Detects vibration signals, perceives touch or external vibrations. |
Phone Vibration Feedback (key presses / notifications), Touch Sensing (some full-screen gestures), Drop Detection (in some models). |
|
Accelerometer |
Measures linear acceleration, perceives motion state and device orientation. |
Automatic Screen Rotation, step counting, photo stabilization, health tracking (running / cycling data recording), Shake Interaction. |
|
Light Sensor |
Detects ambient light intensity. |
Automatic Screen Brightness Adjustment, camera auto-exposure, eye protection mode trigger, some app brightness adaptation (e.g., reading apps). |
|
Gyroscope |
Measures angular acceleration, accurately captures device rotation / tilt actions. |
Mobile games (e.g., steering control in racing games), VR/AR scene interaction, video stabilization (EIS), Navigation Direction Correction. |
|
Electronic Compass (Geomagnetic Sensor) |
Perceives the Earth’s magnetic field to determine direction (north, south, east, west). |
Map Navigation (direction positioning), Compass app, outdoor adventure positioning, AR real-world navigation (e.g., walking navigation arrows). |
|
Distance Sensor |
Detects the distance between an object and the phone (short distance). |
During calls, screen off to prevent accidental touches, phone unlocking (e.g., infrared distance assistance for facial recognition), some gesture operations (e.g., air swipe). |
|
Facial Recognition Sensor (Infrared / 3D) |
Collects facial feature information for identity verification. |
Facial Unlock, Facial Payment, secure app login, privacy protection (e.g., facial authorization to view albums). |
|
Flicker Sensor |
Detects flicker of the screen and ambient light to optimize display effects and eye protection mode. |
Photography: Eliminates “water ripple” and stripes caused by artificial light sources (e.g., LED lights, fluorescent lights). Video Recording: Provides precise exposure time and white balance calibration to ensure smooth and clear dynamic images. |
|
X-axis Linear Motor |
Provides haptic feedback (e.g., gaming vibrations, typing feedback). |
Gaming, input methods, system interactions, notification reminders. |
|
Infrared Sensor |
Emits / receives infrared signals for short-range data transmission or detection. |
Infrared Remote Control (controlling home appliances), facial recognition assistance (nighttime lighting / distance detection), temperature measurement function in some models. |
|
Hall Sensor |
Perceives changes in the magnetic field to detect proximity to magnetic objects. |
Wireless Charging, phone stand automatic wake/sleep, flip cover protection screen off / on. |
|
Laser Focus Sensor |
Emits laser to measure the distance to the subject, assisting in focusing. |
Camera Quick Focus, low-light environment focus optimization, precise tracking focus when shooting moving objects, macro shooting focus assistance. |
|
Multispectral Sensor |
Detects environmental spectral information (including color temperature, light wave bands). |
Camera white balance calibration (restoring true colors), HDR shooting optimization, color accuracy enhancement, skin tone optimization in some models. |
|
Heart Rate Sensor (Optical) |
Detects user heart rate, blood oxygen saturation, and other physiological data. |
Health and Fitness Apps (heart rate monitoring), blood oxygen detection, sleep quality analysis, stress monitoring (supported by some models). |
|
Temperature Sensor |
Detects the temperature of the phone body and the environment. |
Battery Overheat Protection (limits charging / performance at high temperatures), environmental temperature display, temperature adjustment during camera shooting. |
|
Humidity Sensor |
Detects environmental humidity. |
Weather apps humidity data collection, some smart home interactions (e.g., controlling humidifiers based on humidity information sent from the phone). |
|
Pressure Sensor |
Measures atmospheric pressure, indirectly calculates altitude. |
Weather apps pressure / altitude display, weather forecasting (predicting rain based on pressure changes), mountain climbing activity data recording, navigation assistance. |
A total of 19 types of sensors have been listed.
This covers most types currently found in mobile phones.
I hope this is somewhat useful to everyone.