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Smartphone Biosensor Applications | MediaTek Smartphone Biosensor

This application note covers MediaTek Smartphone Biosensor features and its applications. It describes Smartphone Biosensor basics and other Biosensor applications used in various smartphones.

Introduction:
The Biosensors which are used in the smartphones along with its applications are known as smartphone biosensors.

Due to advancement in smartphone hardware and software, CMOS cameras and optical biosensors based smartphones have been developed. This has opened the door for Imaging based and spectrometry based detection techniques via multiple approaches.

The smartphone-based microscope and lens free smartphone microscope have become very popular. Following table summarizes Biosensor based imaging techniques used on smartphone platforms.

Sensing Mechanism Detect Target Limit of Detection Smartphone Model
Contact Microscope White Blood cells >=1.6 µm (Samsung)
>=1.5 µm (Sony-Ericsson)
Samsung Galaxy S2 and Sony Ericsson Aino with 8-megapixel camera
Lensfree microscopy Red Blood cells, white blood cells, platelets, Giardia lamblia cysts >= 2.2 µm Moto Zine ZN5 with 5 Megapixel camera
Lensfree shadow imaging Blood cells, Micro-organisms > = 500 nm Samsung Galaxy S4 with 13 Megapixels
Lensfree Image Recognition Paper Based Blood typing Device - Google Nexus 5

Biosensors are used for wide variety of applications which include Food analysis, Environmental applications, Waste water treatment, to monitor glucose levels, Protein engineering, drug discovery applications etc.

MediaTek Smartphone Biosensor Application Note

Smartphone Biosensor
(Image Courtesy MediaTek Inc.)

MediaTek has recently introduced World's first 6-in-1 smartphone biosensor module. Following six measurements are performed by it in few seconds as claimed by the company.
• Heart Rate
• Heart Rate Variability
• SpO2 (Peripheral Oxygen Saturation)
• Blood Pressure Trends
• ECG (Electrocardiography)
• PPG (Photoplethysmography)

MediaTek Smartphone Biosensor module (MT6381) as shown includes I2C/SPI digital interface.


Types of Sensors and Transducers

Proximity Sensor
Occupancy Sensor vs Motion Sensor
LVDT and RVDT sensor
Position, displacement and level sensor
force sensor and strain sensor
temperature sensor
pressure sensor
Humidity sensor
MEMS sensor
Touch sensor
Haptic sensor
Wireless sensor


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