Technology > Adaptive Capacitance Fingerprint Sensor

Atrua’s touch processing system captures an image of the finger’s features as the finger is moved over the sensor. The adaptive capacitance solid state fingerprint sensor technology accurately senses ridges and valleys on the finger as it moves across its surface. Internal circuits within the sensor convert the fingerprint characteristics into a stream of digital data (a frame) that is presented to the host microprocessor using standard bus interfaces compatible with most microprocessors.

The low power fingerprint sensor is based on our unique and fully passive technology, which uses a highly sensitive array of capacitive elements to detect the finest features of the finger and deliver precise data on the finger movements to the intelligent touch processing software at high frame rates and with low latency. These super-sensitive capacitive elements are continuously adapted by Atrua’s intelligent touch processing software to environmental and usage conditions, enabling Atrua Wings to be used by virtually anyone – all finger types in all seasons and under a wide range of environmental conditions.

The fingerprint sensor combined with intelligent touch processing software provides a revolutionary new class of user input for fingerprint-based biometric security and enhanced navigation and control capabilities.

There are two main classes of touch processing algorithms that execute on the host and process data streamed from the fingerprint sensor in order to enable the core functions of this fingerprint touch processing system:

1. Fingerprint authentication algorithms

2. Control & navigation algorithms

The fingerprint authentication feature offers the market’s best accuracy and performance. Fingerprint authentication algorithms extract the minutiae features used for fingerprint verification, and match the minutiae pattern to the user’s template stored on the device. Customer benchmarked against the market’s top fingerprint recognition solutions, Atrua Wings has been shown to break new ground in accuracy, measured in terms of both false negatives (FRR) and false positives (FAR) as well as the ability to enroll virtually anyone. It’s all about improving usability and we stand behind our no compromise accuracy.

Atrua offers the industry’s richest set of control and navigation algorithms, which detect and translate even very fine finger movements into precise control functions.

Atrua’s unique and highly innovative algorithms were developed explicitly for top performance on low-cost platforms, which include the inexpensive, low-end CPUs and meager amounts of memory typical on mobile phones and other small mobile devices. These highly responsive controls can detect and translate even very fine finger movements into precise controls.

In addition to being highly sensitive and accurate, Atrua fingerprint sensors are tougher than nails. Tested to the extremes, they stand up to the use and abuse typical for mobile phones and game devices. They’ve been shown to withstand over 10 million finger swipes. That’s a lot of use! It would take you two full years of operating it for four hours a day, seven days a week, 365 days a year. This incredible durability includes proven resistance to abrasives, acids, bases, all sorts of cosmetics and other chemicals, not to mention ESD zaps at +/- 15KV, levels far higher than likely to be generated by a user in any environment.