Fingerprint Cards Anacatum IP Ab

Rise Acreo Ab

Rise Acreo Ae

Erik Svensson

Gert Ingvar Andersson

Nils Einar Hedenstierna

Borys Stoew

Karl Lundahl

Morten Rolle Hansen

The invention relates to a method of a fingerprint sensing system of enabling cancelling out impairment data present in an image captured by a fingerprint sensor of the fingerprint sensing system, a method of a fingerprint sensing system of cancelling out impairment data present in an image captured by a fingerprint sensor of the fingerprint sensing system, and a fingerprint sensing system performing the methods.

Cancelling out impairment data in fingerprint images

The present invention relates to a gyroscope sensor for detecting a rotational motion about a sensitivity axis and comprising means for quadrature compensation. The gyroscope sensor comprises a total inertial mass comprising a first inertial mass and a second inertial mass physically attached to each other and arranged such that a rotation of the first inertial mass about a detection axis caused by the coriolis force when the gyroscope sensor is subjected to a rotation about a sensitivity axis. The gyroscope further comprises a first drive structure having a displaceable drive frame which may cause a respective of the first or second inertial mass to rotate about the detection axis in order to compensate for quadrature errors originating from faulty coupling between a drive mode and a sense mode of the gyroscope sensor.

Quadrature compensation method for MEMS gyroscopes and a gyroscope sensor

A sensor is disclosed for detecting a rotational motion about a resulting sensitivity axis. The sensor includes at least two dual mass gyroscope units, each of the gyroscope units are adapted to detect a rotational motion about a sensitivity axis of the respective gyroscope unit. The sensitivity axes being parallel to each other and to the resulting sensitivity axis. The gyroscope units are interconnected at the inertial masses of the gyroscope units which cause the gyroscope unit to operate synchronously.

MEMS gyro

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Gothenburg, Sweden

Erik Svensson