Fingerprint Image Sensor & Module

Fingerprint authentication has been widely implemented for security in data access, payment and entrance. A new trend in mobile devices, such as smart phones/watches and tablets, utilize fingerprint simple and reliable authentication features. For these highly secure applications, CMOS Sensor Inc’s optical fingerprint sensor is an ideal solution. It is capable of scanning fingerprints through thick cover glass (2.5D glass or thicker) with high resolution and high performance, making it possible for the industry to achieve clean under-glass, under-display and water-proof designs.

Most of the existing mobile devices require cover glass cut-out and/or thinning to accommodate the capacitive fingerprint sensor. For the new generation mobile devices, full top-to-bottom, edge-to-edge displays without any cut-out are highly desired. Cover glass cut-out or thinning usually adds a significant amount of cost to the manufacturing process, as well as weakens the cover glass, resulting in low manufacturing yields. CMOS Sensor Inc’s optical fingerprint sensor, with the capability of scanning through thick glass including 2.5D cover glass, offers a perfect solution to eliminating glass cut-out or thinning.

Fingerprint Sensor Features:

Under-glass / under-display / OLED
Sensing area: 4 mm x 6 mm
1016 dpi: 25 x 25 µm pixel; 160 x 240 array
508 dpi: 50 x 50 µm pixel; 80 x 120 array
256 grey scale (8 bits) values in every pixel
High speed SPI bus compatible serial interface
Exposure time control with configurable LED_ON width
1016 / 508 dpi sensor resolution select
Core Voltage VDD = 3.3 V
Interface control VDDio = 1.8 ~ 3.3 V
Low active power consumption Ivdd = 5 mA typical
Sleep modes for power saving ~ 1 µA typical
Fingerprint scan and read out time ~ 18 ms
24 MHz clock and default 1.28 ms LED_On time

Module Mechanical Drawing and Functional Block Diagrams:

Solutions Applications: